Sefar Architecture Experiences, ideas, and new ways with architecture fabrics

EDITORIAL

Credits

Sefar Architecture – Experiences, ideas, and new ways with architecture fabrics

Published by: The heavens within our reach Sefar AG Architecture At the end of July 2005, this was exactly how we felt. At least Hinterbissaustraße 12 that was the case during a visit to Gerber Architects in Dortmund. 9410 Heiden “We really like your fabric – but how can we incorporate it Switzerland without losing light, that’s to say without a wide and obtrusive Phone +41 (0)71 898 56 17 profile? We don’t want small elements and a proliferation of www.sefar.com panels and seams – we need an open sky, not a cumbersome and heavy-looking ceiling.” Overall responsibility: Ingo Thalhammer As a traditional weaving company, it was no easy matter to fulfill Head of business segment the exacting task set for us by the project manager of the King Sefar Architecture Fahad National Library, Saudi Arabia’s national library in Riyadh. And we freely admit that the countless technical issues did In cooperation with: perplex us to begin with. The draft for the project, however, Sarah Dupont (www.sefar.com) radiated a brilliance all of its own which was hard to escape from. So we accepted these technical issues as challenges and Editors: commissioned ArtEngineering in Stuttgart to create a tensioning Hannes M. Sauler and assembly system especially for our fabric. We wanted to see Renate Gratwohl if heavens within our reach really could be woven and installed. (www.markkom.com) Read all about it in this edition and decide for yourself whether we were successful. At Sefar Architecture, we were delighted that Authors: project manager Thomas Lücking from Gerber Architects gave us Ingo Thalhammer an interview in which he outlines his impressions of the final Renate Gratwohl result. Jutta Metzler Hannes M. Sauler Not only the heavens but also the Lake Constance and the Annette Gigon colorful hustle and bustle of the surrounding streets are reflected Herwig Bretis in the glass facade of the new Würth AG administration building Thomas Krieger in Rorschach, Switzerland. Depending on the weather, the building toys with the light and the facade comes alive, ensuring Layout and design: that instead of presenting an unchanging contrast, it is perceived Antonia Bannwart as an integral component of its attractive surroundings. Metal- (www.buobundschiess.ch) coated on one side and laminated in glass, Sefar Architecture VISION Fabric offers amazing sight protection from the outside Translation from German: inwards while simultaneously providing unhindered vision from John Christian the inside outwards. In this publication, we present the dynamic play of light between building and environment in words and Printed by: pictures. A still more spectacular way to experience this is by A. Walpen AG seeing it for yourself as the building also houses an art exhibition (www.walpen.ch) open to the public.

The fact that luxury automobiles look even better when viewed beneath a backlit sky of fabric is well known at the new Audi showroom in Manhattan. The high scattered-light ratio of light- technical fabric and the slender LightFrame system ensure a shadow-free illumination in which heavenly cars look devilishly desirable!

In this spirit, I hope that reading this edition of Sefar Architecture will be a truly heavenly experience.

Yours sincerely,

Ingo Thalhammer Head of Sefar Architecture

3 Architecture Editorial ...... 3

Credits...... 3

our greatest asset: health Privacy and weather protection for patients at the Bern University Hospital heliport ...... 6

A new light on modern masters The new Kassel Gallery opens upwards...... 10 14 PVDF – the underestimated fluoropolymer...... 14

Renaissance in saudi Arabia Reflecting the successful...... 18

The Lightceiling system...... 24

sefar in discussion with Thomas Lücking, Gerber Architects, Dortmund ...... 26

A work of art by the beach A new type of shell is discovered in California ...... 28

Transparency and space A city growing onwards and upwards...... 30

18 Audi stages car show New branch office for New York...... 36

38

Architecture 4 CoNTENTs

Chic open-air oasis on the Mediterranean Sefar faces up to sun and wind...... 38

TENNECT New intelligence for the fastening of steel cables in membrane construction ...... 44 46

Würth in switzerland Transparency and openness in a prime location...... 46

Privacy in Indian open-plan office A healthy arrangement...... 52

The Frankfurt skyline stays A new start for Westend Gate ...... 54 udine plates office building in GoLD Visionary facade design ...... 58 open skies at a swiss bank with tradition The cantonal bank in a new light ...... 60

Driving air upwards Sefar now on the road too ...... 66 sefar is state of the art Exhibits are part of the SCIN Gallery in London...... 72 54

Preview...... 74

Title page Villa in the South of France. Detail of sun awning from SEFAR® Architecture TENARA® 4T40HF.

Photo © Sail Sculpture designed by architect Amandus VanQuaille for The Nomad Concept 66

5 Architecture Vertically tensioned, UV- and weather-proof SEFAR® Architecture EL-30-T1-UV Fabric ensures privacy and weather protection for patients. Our greatest asset: health Privacy and weather protection for patients at the Bern University Hospital heliport

Architecture 6 hELIPoRT BERN UNIVERSITY HOSPITAL H

There is no time to lose when the helicopter touches down on the roof of the Emergency, Intensive Care, and Operations Center in the heart of Switzerland’s capital city, Bern.

At the same time, personal privacy still needs to be guaranteed. At the “Inselspital”, as the Bern University Hospital is known locally, recent reconstruction work on the helicopter landing area had to take into account not only all the safety aspects, but also provide patient privacy and protection from the elements. Patients arriving by helicopter reach the hospital elevator via the new transport tunnel, out of sight, and well

7 Architecture hELIPoRT BERN UNIVERSITY HOSPITAL

sEFAR® Architecture Inselspital, Bern university EL-30-T1-uV hospital, switzerland Light-technical fabric www.insel.ch

Fabric-technical specifications Client Fabric material Inselspital, Bern University Hospital, PTFE (polytetrafluoroethylene) Operations Directorate Material coating for Premises + Buildings 100% Fluoropolymer Architect Fabric width (cm) 160 w2 Architekten AG, Bern, Weave Panama 2/2 Switzerland surface weight (g/m2) 320 www.w2-architekten.ch highest tensile strength Engineering warp/weft (N/5 cm) Tschopp Ingenieure GmbH, Bern, 2,000/1,800 according to Switzerland, www.tking.ch EN ISO 13934-1 Tailoring/Implementation highest tensile elongation A. Arnegger GmbH, Leutkirch, warp/weft (%) 13/12 according Germany, www.arneggergmbh.de to EN ISO 13934-1 Fabric Water column (mm) > 2,000 SEFAR® Architecture EL-30-T1-UV Fire performance B1 according to DIN 4102; B-s1, d0 according to DIN EN 13501-1 uPF (sun protection factor) 40+ according to DIN EN 13758-1 Light-technical specifications Grade of transmission (%) > 30 according to ASTM D1003 Degree of reflection (%) 69 Absorption (%) < 1 Light-technical fabric Material PTFE Width 160 cm Light transmission > 30% Diffused light ratio Very high and minimal color shifting

H Architecture 8 protected from the weather. When helicopters now need less downward running meters and a width of approx. considering how best to cover the walls of thrust when taking off, which has a 3.2 m tensioned with SEFAR® Architecture the new gangway, the building developer positive effect on noise levels. What still EL-30-T1-UV Fabric. By choosing this decided on Sefar fabric. remains, however, are the high wind loads product, architects from w2 Architekten associated with every helicopter arrival and AG in Bern have a fabric which is UV and When it’s all around: departure. For this reason, it was a basic weather resistant, dirt and water repellant, high wind load prerequisite when designing the walkway easy to maintain, and has a highest tensile between heliport and hospital that the side strength coupled with low surface weight. Around 104 tons of steel and 46 tons of walls could be tensioned vertically and that The framework consists of a steel aluminum were lifted onto the roof using the whole construction could also be re- construction with horizontally positioned a mobile crane by heliport specialists tensioned again afterwards. The other L-profiles. Bitschnau GmbH from Nenzing in Austria, essential characteristics demanded by the and construction took place in fall 2011. contractor were that the fabric was odor- This heliport is now one of the most free and color-fast without yellowing, did innovative of its kind and thanks to satellite not buckle or crease, was resistant to acids navigation it is even possible to land here or alkalis, and contained no plasticizers. in fog or low cloud. As part of the reconstruction work, the grating surfaces The new gangway has since proven to be were replaced by a closed landing and a light yet highly stable patient transit transport platform meaning that route. The walls have a total of 55.50

9 Architecture Architecture 10 NEW KAssEL GALLERy

A new light on modern masters The new Kassel Gallery opens upwards

To a large degree, artistic impact and ability Based on the Pinakothek in Munich, the are judged according to the light in which original gallery was constructed between a work is exhibited. When museums and 1871 and 1877 in the form of two square galleries for their part adopt an intelligent gable ends and a rectangular middle approach to planning and placement, the section. Staab Architects in Berlin have overall impression created is harmonious. facilitated a spatial reorganization by This is case at the new Kassel Gallery, redesigning the internal layout with the which having closed in 2005, reopened in entrance now in the form of a multistorey 2011 and is now showing itself in a new foyer linking all three levels directly. These light too: redeveloped, modernized, and are accessible via two interlocked diagonal in respect of its ceiling solution complying air spaces, two large staircases, and an with the most rigorous of fire regulations. elevator suitable for wheelchairs.

Daylight enhances quality Today the Joseph Beuys and Ulrike Grossarth artist rooms – at the center of The top floor is now much more attractive the building – are once more accessible to with the addition of a modern skylight. the general public. Apart from the need to Project partner Schmid GmbH from comply with modern standards, the Simmerberg im Allgäu decided on a single purpose of the renovation and restoration specially developed and adjustable work was to exploit the qualities and supporting structure, the incorporation of characteristics of the detached building at self-constructed, torsion-resistant Schönen Aussicht. The idea behind this aluminum tenter frames, and the was to develop contemporary spatial application of Sefar fabric. sequences for the envisaged exhibition subjects and as a result, sections of the Stunningly large individual elements open gallery will also be used for the the space upwards, bathing the exhibits “Documenta” exhibition. below in natural light from suspended skylight sails. These are constructed from

11 Architecture NEW KAssEL GALLERy Large, custom-made elements with SEFAR® Architecture IA-80-CL coverings open the room upwards.

New Gallery Museum Area hessen Kassel Kassel, Germany www.museum-kassel.de

Architects Staab Architekten GmbH Berlin, Germany www.staab-architekten.com Project partner Schmid GmbH Weiler-Simmerberg, Germany www.schmidgmbh.de Fabric SEFAR® Architecture IA-80-CL

sEFAR® Architecture IA-80-CL Light-technical and acoustic fabric

Fabric-technical specifications Fabric material PVDF (polyvinylidene fluoride) Fabric width (cm) 270, 340 custom-made tenter frames with two Weave Twill 1/3 tensioned layers of membrane and light- 2 surface weight (g/m ) 440 technical fabric, namely SEFAR® highest tensile strength Architecture IA-80-CL. warp/weft (N/5 cm) 1,800/1,000 according to To ensure an even diffusion of daylight or EN ISO 13934-1 artificial light in the exhibition area and highest tensile elongation foyer, the sails are fitted flush with the level warp/weft (%) 35/27 according of the lower ceiling. to EN ISO 13934-1 Tear propagation force Masters with a magnetic attraction warp/weft (N) 40/80 according to DIN 53859-5 The light ceiling sails on the top floor are Fire performance B1 according to provided with attachment magnets which DIN 4102; B-s1, d0 according automatically release in the event of fire to DIN EN 13501-1 so that the sails open by force of gravity Light-technical specifications alone. Construction of the center of Grade of transmission (%) rotation and brake cylinders is such that > 80 according to ASTM D1003 there is neither tension nor movement Degree of reflection (%) 19 transferred onto the adjacent structural Absorption (%) 1 components.

For maintenance work to the lights above the skylight sails or to the ventilation system, the tenter frames can be easily rotated from below and opened by hand.

Architecture 12 13 Architecture Architecture 14 PVDF – the underestimated fluoropolymer

For interior architecture, the monofilament – High UV-durability almost completely shielded by the atoms fibrous thread made from PVDF satisfies – Maximum flexibility surrounding them. With PTFE, this high aesthetic and functional expectations – Excellent light-technical values shielding effect is at its most pronounced and makes a valuable contribution – High strength values since the polymer contains the maximum towards a renaissance in long-term values. – Odor neutral possible number of fluorine atoms. In the – No yellowing case of PVDF, the effect is slightly reduced Admittedly, the name is not that – Low dirt adhesion because of a smaller number of fluorine straightforward – polyvinylidene fluoride – – Resistant to chemicals atoms in comparison to PTFE, but its but it is known in the industry as PVDF for – Durable thanks to stable polymer chains stability is still noticeably superior when short, making it both easier to write down – No toxic plasticizers compared to common polymers which do and to pronounce. As a fluoropolymer, – No fiber breakage not contain any fluorine, such as polyvinyl this particular material stands somewhat – No embrittlement chloride (PVC) or polyester textiles. in the shadow of its “big brother,” – Good fire performance values polytetrafluoroethylene, better known by Light transmittance its abbreviation PTFE or the registered The chemical inertness and therefore trade name Teflon®. In fact, PVDF displays tough durability of fluoropolymers is down Light lifts moods and emotions, and with properties very similar to PTFE and in some to the fact that on an atomic level fluorine 80% our situational information being respects (e.g. light transmittance) PVDF atoms (in comparison to the very small received visually, it has a profound effect actually outperforms PTFE. hydrogen or chlorine atoms) have a on our biorhythms. Generally speaking, relatively large spatial circumference which light is the region of the electromagnetic Fluoropolymers offers greater protection to the atomic spectrum which is visible to the human bonds between the carbon atoms in the eye. The particular characteristics of chain. In effect, the carbon bonds are fluoropolymers were already covered in some detail in the first issue of Sefar PTFE molecule (C2F4) PVDF molecule (C2H2F2) Architecture. Fluorine, which is obtained from the naturally occurring mineral fluorspar, is a component of a number of polymers such as PTFE or PVDF, giving them unique characteristics. Fluoropolymers can then be spun into yarns which in turn can be woven into top-quality fabrics. Spinning and weaving require special skills on the part of the manufacturer in order to create an homogenous, reproducible end product. These fluoropolymer fabrics meet the growing trend for top-quality black = carbon atoms black = carbon atoms, green = fluorine building materials and distinguish green = fluorine atoms atoms, blue = hydrogen atoms themselves by a series of outstanding – – The full carbon bonds are wellshielded by The carbon bonds –C–C– properties: – – fluorine atoms giving PTFE its unique are relatively well shielded by fluorine atoms, properties. giving PVDF properties similar to PTFE.

15 Architecture Light which passes through a membrane possesses a high proportion of diffuse is affected by several factors. The reflection light, also known as scattered light and and absorption parameters of a membrane this provides an even light source, influence the degree of light transmission noticeably reducing contrasts, especially in (transmission ASTM D1003) through a shaded areas. The fabric gives the medium. Optical spectroscopy also deals impression of a light source, but actually with transmissions dependent on functions as a light diffuser, whether in wavelength and accordingly reflection (EN daylight or artificial light, resulting in an 410 250–2,500 nm). Light-technical fabric agreeable lighting atmosphere with very made from PVDF stands out in particular few shadows. because it shows no significant variation across differing wavelengths (especially in PVDF yarn is obtained directly from the the visible range). extruder as a pure strand known as a Fabric The fabric is able to diffuse light falling on monofilament (similar to a hair). A detour it to such a degree that a backlit fabric ceiling The human eye can also distinguish using extruded membranes which are cut gives the appearance of a single illuminated between two other visual phenomena, into ribbons and have to be drawn into surface. What most people describe namely turbidness (haze/opacity) and weaveable yarn as is the case for PTFE (see as brightness is also known as luminance. image definition (clarity). With turbidness Sefar Architecture Issue 2) is not necessary. Rays from a light source falling on the fabric (haze/opacity), light entering a medium These fine, directly extruded mono - are reflected, scattered and diffracted, will be scattered evenly in all directions, filaments make it possible to weave a or refracted. creating a reduction in visual contrasts and precise fabric which has an homogenous a milky, hazy appearance. textile structure. This homogeneity is

With image definition (clarity), light further intensified by special coating entering a medium will only be scattered technology which is also based on to a small degree, distorting contours and fluoropolymers, ensuring backlit surfaces making them appear less sharp. have a striking appearance. Galleries, museums, work spaces, public meeting All fluoropolymer fibers display amazingly places, and libraries are increasingly high levels of light transmission – much benefiting from these light-technical higher than PVC, polyester or other coated properties. The library in Riyadh (see pages glass fibers. In this case, PVDF even 18–27), which opened in September exceeds PTFE and with the appropriate 2013, is an impressive example of how a coating technology, it is now possible to PVDF light ceiling combined with a suitable manufacture PVDF fabrics with light assembly system (see pages 24–25) is also transmission rates as high as 90%. Values possible for large surface areas. such as this open up even more possibilities for their application in light Glass No plasticizers Glass has a weak, light-scattering surface. ceilings. Whether the light source is natural Diffuse light amounts to < 2%. or artificial, a PVDF fabric membrane Architecture fabrics made from pure scatters incoming light rays rather than fluoropolymers are free from plasticizers, blocking them. The transmitted light unlike other materials such as fabrics or

Architecture 16 membranes made from PVC. impressive example of how a PVDF light Fluoropolymers do not need any additives ceiling combined with a suitable assembly as they are naturally flexible materials. system is also possible for large surface Plasticizers, which are used in synthetic areas. High light transmission combined materials, are based on phthalic acid esters with high light scattering produces and can be harmful to health. The research optimum lighting conditions in interior has not been completed yet, but some spaces. Dispensing with any form of plasticizers are even thought to be plasticizer creates a more healthy and carcinogenic. Because of their high odor-neutral atmosphere. The full volatility, these can become concentrated chemical name may be difficult to in enclosed spaces and then inhaled. Even pronounce but the properties of PVDF brief contact with the skin can be make it an excellent material for textile dangerous as these are able to penetrate architecture. the skin barrier. Many types of plasticizer are now banned by law, but it does not follow that those still permitted are therefore harmless.

Alongside the health aspects, the volatility of plasticizers over time causes the material to become brittle, with a corresponding reduction in tensile strength or tensioning resilience. The material is also subject to accelerated aging: tailoring and assembly, the folding procedure, as well as other external mechanical or chemical demands on the material can also damage the coating. Once the coating is damaged, the components of the plasticizer quickly escape into the environment. The result is localized embrittlement which leads to a reduction in strength values and thus to impaired operational safety. summary

An increasing number of applications in galleries, museums, work spaces, public meeting places, and libraries bear witness to the unique properties of the fluoropolymer PVDF. The library in Riyadh, which opened in September 2013, is an

17 Architecture KFNL RIyADh SAUDI ARABIA

RENAISSANCE IN SAUDI ARABIA The way in which tried and tested building Park, so after nearly three years of Reflecting materials and new elements clearly construction it now appears open and complement one another symbiotically transparent. the successful can be seen at the King Fahad National Library in Riyadh, Saudi Arabia. Here in the In searching for the most suitable fabric national capital, already rich in for the ceiling solution, a final decision was contemporary architecture, the application made to use Sefar. By employing SEFAR® of modern materials has turned a building Architecture IL-80-OP Fabric together with dating back to the 1970s into an urban a Sefar Lightceiling” System specially landmark which skillfully blends into the developed for this project, the entire area Arabic city skyline. is now illuminated by a translucent, seemingly floating light ceiling. Tradition and progress in equal measure characterize modern life in Saudi Arabia. Reading the traces of the past Architects from Gerber International Berlin realized the existing building complex was The new solution supplements the old worth preserving and so retained its with a cubic ring, meeting historical monumental precision whilst providing the conservation criteria and resulting in an exhibits with a lot more space and light. A optically successful entity in which the new square building now encases the existing flat roof of the original structure library in a seemingly floating, but at the has been transformed into a reading room. same time geometrical form. Just as the Here in the interior – like a treasure trove – graceful building appears to be the books can be found. The main embroidered into the spacious Olaya City entrance hall, exhibition area, restaurant,

Architecture 18 RENAISSANCE IN SAUDI ARABIA

19 Architecture KFNL RIyADh SAUDI ARABIA FAST ASSEMBLY AT GREAT HEIGHTS

Extraordinary assembly conditions. Before the building was “sealed,” 16,000 m2 of SEFAR® Architecture IL-80-OP light-technical fabric was fitted to a specially developed Sefar Lightceiling System.

Architecture 20 21 Architecture AN OASIS OF and a book store can be found on the through the long, narrow skylights, ground floor, arranged around the existing providing all areas with an even and non- PEACE building. Visitors from the reading room blinding light source. reach the open-access section on the third floor of the new building via bridges. The Acousticians involved in the project library for women, separated from other recognized an ideal noise insulator in a functions and independently accessible, is material chosen principally for its optical on the first floor of the new south-west properties. The fabric forms a closed skin wing. An existing dome was converted to comparable to an eardrum; very little a steel-glass construction which towers reverberation is directed downwards – and above the entire inner courtyards and the echo above the membrane is absorbed reading room with an integrated roof. by the mineral wool and perforated trapezoidal metal sheets of the insulated An oasis of peace ceiling.

The recommendation of project director Installing the membrane presented a and leading on-site architect, Thomas particular challenge since working in a Lücking, was for a spatial interior effect dust-free environment, as is customary, which reflected typical urban life. Below was simply impossible in a city such as the roof is a tensioned white membrane Riyadh, surrounded by the desert. For this of Sefar fabric totaling around 16,000 m2 reason, the membrane construction had which filters powerful sunlight shining to be installed before the building was airtight and cleaned only at the very end.

Architecture 22 KFNL RIyADh SAUDI ARABIA

King Fahad National Library, system Lightceiling Riyadh, saudi Arabia sEFAR® Architecture IL-80-oP

Architect Light-technical fabric Gerber Architekten International Fabric-technical specifications: GmbH, Berlin, Germany Fabric material www.gerberarchitekten.de PVDF (polyvinylidene fluoride) Tailoring Material coating ALI TAMIMI SONS CO., Riyadh 100% fluoropolymer Client Fabric width (cm) 160 Saud Bin Ladin Group, Jeddah, Weave Plain weave 1/1 The orient by night Saudi Arabia surface weight (g/m2) 250 Engineering and system highest tensile strength Today, the construction is praised by local development warp/weft (N/5 cm) people for its successful architectural ArtEngineering GmbH, Leinfelden, 1,050/1,050 according to application of shrouding, a principle Germany EN ISO 13934-1 strongly anchored in Arabic cultural Pollux GmbH, Ottenhöfen, highest tensile elongation understanding. During the hours of Germany warp/weft (%) darkness, lamps above the light ceiling 40/25 according to EN ISO 13934-1 membrane take over the function of the Tear propagation force skylights, bathing the facade in changing warp/weft (N) 35/50 according to colors. Riyadh – lying in the middle of the DIN 53859-5 desert – now has a lighthouse guiding the Water column (mm) > 500 way to its literature. Fire performance B1 according to DIN 4102; B-s1, d0 according to DIN EN 13501-1 Light-technical specifications Grade of transmission (%) > 80 according to ASTM D1003 Degree of reflection (%) 19 Absorption (%) 1

23 Architecture 12 3

The SEFAR® Architecture Lightceiling System was developed as part of the King Fahad ® National Library (KFNL) project in Riyadh, SEFAR Saudi Arabia. The obvious task facing Sefar and ArtEngineering was to invent a system capable of supporting the 16,000 m² fabric ceiling within the library building. Architecture Performance / area of application: The SEFAR® Architecture Lightceiling System is ideal for covering surfaces with unit membranes up to 10 m × 25 m. Lightceiling Ideally, the geometry of the membrane boundaries should be polygonal.

The system is characterized in particular by having very short assembly times for the individual membrane panels. As was seen in the case of the KFNL project, the system technology is also straightforward enough for contractors not immediately familiar with fabric or ceiling assembly to use without difficulty.

system description and system components

The essential parts of the system consist of light-technical fabric, attachment components and assembly tools, as well as planning and maintenance documentation. The light-technical fabric forms the visible surface and with the help of attachment components it is firmly fixed to the main structure (steel or concrete supports etc.), tensioned and crease-free. The attachment component consists of a three-part extrusion profile – the supporting rail, the tensioning rail, and covering rail.

Architecture 24 KFNL RIyADh SAUDI ARABIA

456

Basic functioning principles Fixing elements 1 Fixing the support rail to the Just like the membrane panels, the fixing supporting structure Fast and safe assembly is made possible elements are precisely defined during the 2 Hanging the tensioning rail by the use of a continuous, pivoted planning phase, cut to right length, and if 3 Feeding in the textile edge tensioning rail which is threaded into the used for connections predrilled or 4 Tensioning fabric. A special tool permits the rolled-up prepunched. In the KFNL project, the 5 Locking the tensioning rail membrane panels to be inserted into the supporting rails were attached to the main 6 Finish with covering rail tensioning rail directly from the ground. structure by means of M10 welding studs. With the help of a template, the position Planning, production, and assembly of the bolts on the main structure is marked in advance and afterwards the Planning bolts are set. Although the work took place The fabric tailor receives cutting plans and overhead, the technology proved to be detail plans for the stitching design and for consistently robust with a uniform and the manufacture of handling aids. The visually verifiable result. As soon as the assembly company receives the layout for bolts are welded, the supporting rail is the attachment components as well as inserted, positioned, and then fixed using detailed solutions for corners, open edges, slotted holes and spacers. Guide bolts at ceiling breaches, etc. the points where the two supporting rails meet ensure an exact alignment. Membrane panels Membrane panel manufacture is carried In the next stage of construction, out by a tailor and these are sewn together tensioning rails are mounted along the from individual sections of fabric. At the membrane panel. Here too, guide plates factory, the fabric is cut into exact parallel ensure a precise and friction-locked widths. These preset widths, together with connection at the junction points. Special specially developed stitching details and a retention clamps prevent the tensioning predefined sewing procedure, make it rail from accidentally falling out of the possible to align two neighboring supporting profile groove during the membrane panels exactly at a later date if threading of the fabric. Once these required. Despite the stitching having a preparations are complete, the fabric is fed very discreet width of only 10 mm, there into the groove of the tensioning rail and is still a visible outline within a membrane finel adjustments made. panel. Once the individual fabric sections have been sewn together to form a As soon as the desired position is reached, membrane panel, the edges are seamed both open edges are overlaid with The rail ensures that not only is the gap with piping. Following a final quality tensioning rails, tensioning always taking between the two membrane panels control check, the membrane panel is place in both directions (warp and weft). covered, but also the preload force on the rolled onto a cardboard tube and prepared In one final stage, a delicate covering rail two neighboring panels is short-circuited for shipping to the construction site. similar to a zipper is “unrolled.” and the bending load on the arms of the tensioning rail is minimized.

25 Architecture KFNL RIyADh SAUDI ARABIA

Sefar in discussion with Thomas Lücking, Gerber’s architect in Dortmund

Project director Thomas Lücking from the Implementation planning and invitations block light. In this situation, a membrane Gerber offices in Dortmund is the leading to tender were carried out from ceiling which was backlit by the sun or architect responsible for the King Fahad Dortmund. In addition to this, we were artificial lights presented an attractive way National Library in Riyadh. His many years also commissioned to carry out the artistic of creating that sense of “lightness”, and of experience, especially with building management of the project. someone entering a space which opened projects in desert states, make him an ideal upwards towards the sky would feel materials specialist and valued consultative What were the greatest challenges similarly uplifted. So we went in search of partner for Sefar. you faced? a material which offered high rates of light These were far-ranging. It was essential for transmission. Mr. Lücking, what philosophy do you us that the design draft would be associate with the designs for the implemented in the form it was submitted. speaking of materials, what light King Fahad National Library? Endusers, agents of the client, suppliers, transmission rates and material I ought to say from the outset and with and contractors were always coming to us properties were important to you? the benefit of hindsight that for us this with design modification requests and For this project, we studied and tested a project was only one part of a two-phase different ideas about how best to proceed. lot of different possible solutions. We were competition and Gerber Architects did not It was therefore very important to be on- looking for a material suitable to create an take part in the first phase. It was only in site – otherwise it was very possible that homogenous, bright, light-transmissive the second phase that we were modifications would have been carried out surface – without the need for distracting commissioned to rework the original without our knowledge and our concept panels and seams. Everything located winning project from phase 1. This focused distorted as a result. It might easily have above the membrane had to be invisible, essentially on the facade. The original plan ended up looking very different today. meaning the material had to have high was for a tower block in which the library translucence coupled with low would sit above the existing facility on a you chose sefar fabric. Why did you transparency, and large field sizes. This was supporting bridge. But in the end, with the decide on this fabric in particular? possible because the 1.6 m wide fabric high price of steel and budget cutbacks, What was the idea behind it and sections were connected by very fine, the client opted for a change in concept. what were your goals? inconspicuous stitching, making panel The new draft design for phase 2 was less The membrane spanning the whole area sizes of 10 × 25 m a reality. expensive: a flat, horizontal construction beneath the roof, some 16,000 m2, covers – a reordering of the existing building and both the new and existing buildings as well What was the on-site operation like? no more “on top.” as the courtyards between them. For us it how were these huge membranes was important that the urban character of assembled? the exterior space could also be replicated It was unusual in that we were able to inside the library. To achieve this, we develop a special mounting system in needed a sky over these areas, certainly partnership with Dr. Greiner from not a ceiling which would be heavy and ArtEngineering and with Sefar. This was

Architecture 26 specially made to our specifications with company. In this regard, Sefar together Using modern the minimum possible number of visible with Pollux and ArtEngineering made a architectural materials, attachments, but very large field sizes. very valuable contribution. The result was an urban landmark a permanent team of on-site construction was created whose Looking back, what sort of acoustic workers who were properly trained for the night-time facade requirements needed to be met? membrane assembly. shines out in changing Of course an acoustician was involved in colors. the project and there were many problem- Aside from the current project, what solving approaches discussed during the are the deciding factors when planning. In the end, the solution we came choosing a fabric? up with was very satisfactory. Chosen for Together with transparency and its optical properties, the membrane translucence, tensile strength is certainly formed a closed skin similar to an ear- very important. The same applies to drum, with the membrane allowing very temperature stability and cleaning little reverberation to penetrate below its performance – especially for applications surface. The echo above the membrane, using backlighting. however, is absorbed by the mineral wool and perforated troughed metal sheets within the insulated ceiling.

Were there other challenges specific to Riyadh as a location? The installation conditions for Sefar were certainly different to what would be the case in Europe. For a start, dust-free installation was simply out of the question because of the construction schedule and because of the copious amounts of sand WE HAVE in Saudi Arabia. For this reason, the membrane was installed before the structure was airtight – that in itself and the cleaning which had to be done later CREATED presented their own challenges. It was also very important to give firm guidance to the on-site team chosen by the construction A HEAVEN

27 Architecture CIVIC BuILDING NEWPORT BEACH

A work of art by the beach A new type of shell is discovered in California

The image California likes to present is cool reputation for culture, public employees Embodiment of the ocean city and easygoing. Directly on the shore in were based in a technically inadequate city Newport Beach, there is now a new civic hall for many years. The impressive roof construction building which reflects architecturally the resembles a wave pouring out of the main characteristic Californian lifestyle. In planning the new civic center, the city building. A curved sail made from tough authorities at Newport Beach stipulated it SEFAR® Architecture TENARA® Fabric Both visitors and its 86,000 inhabitants had to echo the beauty of the 4T40HF conceals the two-storey council alike are attracted by an exciting waterside surroundings according to sustainable chamber like a seashell, bringing a gentle life at Newport Beach, the largest principles. The project was put out to light from the nearby ocean into play. With recreational harbor on the west coast. Yet tender and the eventual winner was Bohlin 40% light transmission – twice that of even in this bustling, leafy city with a Cywinski Jackson from San Francisco. conventional industrial fabrics – it offers

Architecture 28 Newport Beach, California

Architect Bohlin Cywinski Jackson (BCJ), San Francisco, USA www.bcj.com Engineering Scott Sanders, S.E. Claremont, USA General contractor CW Driver, San Diego, USA www.cwdriver.com Manufacturing EIDE Industries, Inc., Cerritos, USA www.tensionstructures.com

sEFAR® Architecture TENARA® Fabric 4T40hF Light-technical fabric

Fabric-technical specifications Fabric material Fluoropolymer-coated fabric made from ePTFE fibers Fabric width 1.575 m Fabric thickness 0.55 mm A work of art by the beach 2 surface weight 1,080 g/m highest tensile strength (AsTM D4851) Warp 4,000 N/5 cm Weft 4,000 N/5 cm Trapezoidal tear resistance exactly the right degree of light-shade as accentuated by design engineer Erik Warp 798 N intensity, as well as protection from Jarvie from EIDE Industries, Inc. Weft 752 N sunlight and rainfall. In addition, the Fire performance material is fireresistant, dirt and water Point of contact by the ocean EN 13501 B-s1, d0 ASTM repellant, extremely durable, and free from E84 – Class A possibly toxic plasticizers. The flexible and The already completed complex embodies NFPA 701 – Small Scale – Pass robust SEFAR® Architecture TENARA® a successful interplay of airy fabric and a Light-technical specifications Fabric 4T40HF also impresses by offering gleaming, zinc-clad facade: The first point Grade of transmission a number of exciting possibilities for of contact for residents and visitors to 38% (ASTM D1003) uncomplicated incorporation into an Newport Beach now resembles the Degree of reflection 59% otherwise markedly sophisticated project glistening Pacific Ocean. Absorption 3%

29 Architecture SEFAR® Architecture VISION Fabric as a primary component in the glass facade of the Europaallee building by architects Gigon / Guyer.

Architecture 30 sIhLPosT ZURICH

Transparency and space A city growing onwards and upwards

Cities are changing for the better. relevance, clear identity, and functionality Alienation, ghettoization, isolation – this is intended to reflect a high level of social, is history. Responsible for these positive economic, and ecological quality in changes are town planners and visionary addition to the requirements of those with architects such as Max Dudler, David overall responsibility. Chipperfield, and Annette Gigon / Mike Guyer, who are giving the city back its social responsibility behind glass balanced mix of styles. The Swiss National Railway (SBB) at the main station in Zurich With construction work commencing at is responsible for a huge project. the beginning of 2009, the newest part of Zurich is to be completed in eight stages. Below is the city, above is the view. And The “Europaallee” is characterized by with you right in the middle, says the SBB various architectural styles giving the place in its plans for investors and tenants, who a deliberately timeless, European feel. readily appreciate its central location and Construction Area C, part of the successive convenient train services. Urban living, development program, is the responsibility studying and working, shopping and of Max Dudler (Zurich), Annette Gigon / enjoyment for people of all ages, coupled Mike Guyer (Zurich), and David with sustainable land and property values Chipperfield (Berlin), the team which along the railway tracks, and interaction emerged as winners of the architecture with the neighboring parts of town – all competition. these were clearly stated aims. Today, the Zurich Teacher Training College is already European urban construction an integral part of the first stage of culture redefined construction. Businesses and offices, restaurants and bars, leisure and training The team decided on an ensemble of four facilities, as well as housing explicitly building sections, interlocked like the sails provided for the elderly all followed in of a windmill to create a joint quick succession. The special architectural organizational system. The buildings are

31 Architecture Architecture 32 sIhLPosT ZURICH Photo: Stefan Müller, Berlin

33 Architecture sIhLPosT ZURICH sihlpost, Zurich

Project / location Europaallee 21, Construction Area C, Zurich, Switzerland www.europaallee.ch Architects Lagerstrasse building Annette Gigon / Mike Guyer Architects, Zurich, Switzerland www.gigon-guyer.ch Freischützgasse building David Chipperfield Architects, Berlin, Germany www.davidchipperfield.com Europaallee building Eisgasse building Max Dudler, Zurich, Switzerland www.maxdudler.com General contractor Implenia Generalunternehmung AG, Dietlikon, Switzerland www.implenia.com Facade planning to implementation gkp fassadentechnik ag, Aadorf, Switzerland, www.gkpf.ch Implementation with planning Gig Fassaden GmbH, Attnang-Puchheim, Austria www.gig.at Glass manufacturer BGT Bischoff Glastechnik AG, Bretten, Germany www.bgt-bretten.de Interlayer manufacturer separated from each other by a gateway were already familiar with Sefar qualities DuPont de Nemours GmbH, to the inner courtyard but at the same time and the specific energy-technical results (Germany), Neu-Isenburg, Germany linked above by horizontal, continuous from previous construction projects so www.dupont.com structural components. A gallery on the again chose different fabrics from the first floor above ground level constitutes SEFAR® Architecture VISION range. Lagerstrasse building the access ring for the office buildings. Among these was a type of fabric with a SEFAR® Architecture VISION Roof terraces and entry points next to the specially developed color – a challenge Gewebe AL 140/70 printed courtyard gates divide the complex which Sefar rose to brilliantly: all the Freischützgasse building optically into different structures. Multi- surfaces are printed in warm, inviting SEFAR® Architecture VISION Fabric storey window frontages with a total golden shades. The effect is a fascinating AL 260/55 printed, ® surface area of 6,500 m2 will shape play of light which maintains privacy SEFAR Architecture VISION Fabric Construction Area C in the future, when within, but affords optimal views from the AL 260/31 printed employees of the Swiss banking giant UBS inside outwards. Since direct sunlight is AG begin working there in 2013. reduced, the temperature in the building is kept comfortably cool. And Zurich’s Financial city in gold famous Bahnhofstrasse – the bustling shopping mile, the banking district, and An elemental component in the Gigon the romantic old town are only a few Guyer glazed facades and on the structural minutes away from the newest part of components of Europaallee is provided by town, which will continue to grow until SEFAR® Architecture VISION Fabric in the the final phase is completed in 2020. outer glass facade elements. The fabric used has open surface areas ranging between 31% and 70%. Conceptualized by David Chipperfield, structural components facing the railway track area in casements, on columns, and on interior fittings also use SEFAR® Architecture VISION Fabric. Both teams of architects

Architecture 34 Conceived by David Chipperfield, the warm, golden colors of SEFAR® Architecture VISION Fabric dominate the facade in the railway area of the complex.

35 Architecture AuDI NEW YORK

AUDI stages car show New branch office for New York

There’s always something rather special It therefore follows that Audi should make The show rolls on about taking delivery of a new car. Audi no compromises when it came to choosing understands the emotions connected with the materials used in the construction of Once you’ve ordered your chosen model, it: esteem, increased confidence, and eager its new showrooms. Just as exacting were you have to wait. This is the case in Europe anticipation. New York is shaped on such the contractor, architects, and designer in and it’s no different in the USA. So when aspirations and Audi the car manufacturer the planning of the new Manhattan branch the long-awaited car finally rolls in, lighting is respected the world over for its technical office. plays a particularly important role. A edge. reduction to the bare essentials is the Unadorned and elegant aesthetics underlying concept for the sizeable combined with easy-to-maintain and ultra- showroom in which the purchaser takes modern materials were an absolute must final delivery of the new Audi. Discreetly for the building contractor. With the and intentionally minimalist, the transfer of Audi New York direct to translucent SEFAR LIGHTFRAME® wall and Manhattan, architects from CR Studio New ceiling panels place the automobile in the York were able to achieve a fast and very center. Unseen behind panels, optically convincing solution using SEFAR installed light sources provide flattering LIGHTFRAME® Module and SEFAR® illumination, imparting a private ambiance Architecture IA-80-CL Fabric. and improving spatial acoustics. To achieve

Architecture 36 The New York based Audi showroom is in the heart of Manhattan.

Audi Manhattan, sEFAR® Architecture IA-80-CL New York, New York, USA Light-technical and acoustic fabric www.audimanhattan.com Fabric-technical specifications Architect Fabric material CR Studio, New York, USA PVDF (polyvinylidene fluoride) www.crstudio.com Fabric width (cm) 270, 340 Assembly / implementation Weave Twill 1/3 Decoustics Limited, Woodbridge, surface weight (g/m2) 440 Ontario, Canada highest tensile strength www.decoustics.ca warp/weft (N/5 cm) Engineering 1,800/1,000 according to this, crease-resistant and especially National Acoustics, New York, USA EN ISO 13934-1 translucent fabric is tensioned across a www.nationalacoustics.com highest tensile elongation super slim modular frame system in two General contractor warp/weft (%) separate layers and in dual orientation. The JT Magan, New York, USA 35/27 according to EN ISO 13934-1 double membrane can be installed on site www.jtmagan.com Tear propagation force in a short time and the visible face is Lighting Consultant warp/weft (N) finished with acoustically active SEFAR® Tillotson Design Associates, 40/80 according to DIN 53859-5 Architecture IA-80-CL PVDF Fabric. New York, NY USA Fire performance www.tillotsondesign.com B1 according to DIN 4102; Long-lasting advantages Fabric B-s1, d0 according to SEFAR® Architecture DIN EN 13501-1 The client is especially impressed by the IA-80-CL Light-technical specifications ® advantages LIGHTFRAME® Module offers LIGhTFRAME Module Grade of transmission (%) in the short and long term. The two-layer Dimensions 1,400 × 3,190 mm > 80 according to ASTM D1003 system prevents a buildup of dirt by insects Degree of reflection (%) 19 or dust, while the respective ceiling module Absorption (%) 1 can be simply folded down vertically when replacing or cleaning a light source.

37 Architecture Chic open-air oasis on the Mediterranean

Architecture 38 PRIVATE VILLA SOUTH OF FRANCE

Sefar faces up to sun and wind

It would be difficult to live any closer to the sea. This exclusive villa on the southern coast of France seems to be almost immersed in the endless blue of the Mediterranean. The client’s wish was to be out of doors and to enjoy the special Mediterranean glow protected from wind and sun.

39 Architecture PRIVATE VILLA SOUTH OF FRANCE

Around 30 meters above sea level, on a A section of the pool is covered by Villa in the south of France a large awning produced from barren cliff, two awnings defy the marine ® especially tear-resistant SEFAR Design / project climate as they keep a lookout over the Architecture TENARA® 4T40HF Management /implementation deep blue sea. Securely held by spring Fabric, providing shade and hooks from a chandlery and two spear- protection from the wind and at The Nomad Concept shaped masts, this is no illusion, but rather the same time, thanks to its static the audacious construction of Belgian excellent light transmission The Nomad Concept, properties, bathing the adjacent Prof. Dr.-Ing. Marijke Mollaert architect Amandus VanQuaille. relaxation area in a gentle light. as consultant Top priority, however, was sheltering the Tailoring sizeable outdoor area and the building Flontex Europe, Poland from the intensive sun, heat, and direct Cable system light. For this reason, the upper of the two Bluewave, Denmark; awnings is made from SEFAR® Architecture Carl Stahl, Benelux TENARA® 4T40HF, a robust material able to withstand the eddy winds, unrelenting sea air, and coastal spray. It absorbs no moisture, as well as being permanently UV resistant, colorfast, and weatherproof. The lower awning, made from SEFAR® Architecture EL-30-T1-UV with its special coating is able to filter out UV light and protect occupants from heat radiation.

Architecture 40 41 Architecture The upper layer of the two-ply awning is made using SEFAR® Architecture TENARA® 4T40HF, providing front-line protection from wind and weather thanks to its high tear-resistant properties and easy-to-maintain infrastructure. The lower layer awning made from SEFAR® Architecture EL-30-T1-UV filters out UV light, ensuring sophisticated sun protection below.

Architecture 42 PRIVATE VILLA SOUTH OF FRANCE

sEFAR® Architecture TENARA® sEFAR® Architecture Fabric 4T40hF EL-30-T1-uV Light-technical fabric Light-technical fabric

Fabric-technical specifications Fabric-technical specifications Fabric material Fabric material Fluoropolymer-coated fabric PTFE (polytetrafluoroethylene) made from ePTFE fibers Material coating Material coating 100% fluoropolymer 100% fluoropolymer Fabric width (cm) 160 Fabric width Weave Panama 2/2 157.5 cm / 62.0 inch surface weight (g/m2) 320 Weave Plain weave 1/1 highest tensile strength surface weight warp/weft (N/5 cm) 1,080 g/m2 , 31.9 oz/square yard 2,000/1,800 according to Thickness 0.55 mm / 0.022 inch EN ISO 13934-1 highest tensile strength highest tensile elongation Warp 4,000 N/5 cm / 456 warp/weft (%) pounds/inch (ASTM D4851) 13/12 according to EN ISO 13934-1 Weft 4,000 N/5 cm / Water column (mm) > 2,000 456 pounds/inch Fire performance Trapezoidal tear resistance B1 according to DIN 4102; Warp 798 N/179 pounds B-s1, d0 according to (ASTM D4851) DIN EN 13501-1 Weft 752 N/169 pounds uPF (sun protection factor) Water column (mm) > 10,000 40+ according to DIN EN 13758-1 Fire performance EN 13501 B-s1, Light-technical specifications d0, ASTM E84 – Class A, Grade of transmission (%) NFPA 701 – Small Scale – Pass > 30 according to ASTM D1003 Light-technical specifications Degree of reflection (%) 69 Grade of transmission Absorption (%) < 1 The stuff of dreams 38% according to ASTM D1003 Degree of reflection (%) 59 As if two ballet dancers were gently Absorption (%) 3 touching, is how the architect describes the constant interplay between the two selected Sefar fabrics. The ingenious construction and combination of different layers traps heat between the two awnings, using the chimney effect to ensure a markedly effective way of cooling; heat simply rises upwards. Indeed the lower awning only touches the upper one at its extremities, where the carbines grip and the fabric is anchored to the bare rock.

The old trees on the site have been skillfully integrated too – and today they still form a naturally growing part of the airy sun roof. The Sefar fabric was tailored into the appropriate arched shapes and built around the gnarled tree trunks. Even the spear-like masts which appear to pierce through the fabric at the top have an almost organic presence within the sweeping lines of the awning.

43 Architecture TENNECT New intelligence for the fastening of steel cables in membrane construction

The production of cables dates back 130 Medina al-Munawwarah were developed handling 80% of all fastening situations. years for the Carl Stahl Group and such from scratch (for further details about this Great emphasis was placed on high levels systems have a wide range of applications project, see Sefar Architecture, Issue 1). of efficiency and flexibility. in industry, the building trade, and in architecture. In the past, textile Around four years ago, the demands of For this design project, Carl Stahl was architecture employed cables and end specialist planners for standardized supported by specialists such as Michael fittings such as external screw thread solutions grew, driven by the exacting Kiefer from Planungsbüro K.TA, Horst Dürr terminals or fork terminals. requirements of membrane construction. from IF Group, and Robert Wehdorn- To begin with, a special study analyzed Roithmayr from Formfinder. Over the Even bespoke cable solutions like the one hundreds of different membrane course of many development stages and commissioned by Liebherr when designing constructions. Its goal was to develop a practical tests, the system was conceived, the sun umbrellas for the mosque at standardized 3-D connection capable of modified, and optimized.

Architecture 44 PRIVATE VILLA SOUTH OF FRANCE

The new TENNECT spherical head making design planning considerably planners, tailors, metalworkers, and mounting for steel cables is made from easier and dimensional tolerances can be membrane cable suppliers. To make the stainless steel 1.4405. The casting method compensated on site. In addition, the design stage more straightforward, the means there is practically no material loss surfaces of the structural components for components are already integrated into as is the case with turned and milled parts. the new spherical head are coated with “Formfinder” software and in future also To keep the construction element Teflon®, which improves lubrication of the in “Easy” by Technet. dimensions as small as possible, the parts link and acts as an anticorrosive. are vacuum tempered afterwards to achieve a yield strength of 850 N/mm². Another benefit of the standardized The spherical head can be configured system is that it greatly simplifies through 360° in the tension direction, communication and cooperation between TENNECT

45 Architecture Würth in Switzerland Transparency and openness in a prime location

Architecture 46 WÜRTh RORSCHACH

Plays of light – this was the concept devised by Zurich architects Gigon / Guyer Würth in Switzerland which so impressed the client and patron of the arts, Reinhold Würth, and the Transparency and openness in a prime location judges. A shimmering, glazed shell represents the inviting character of the new administration building with training/ development center and congress arena in Rorschach, Switzerland. Significant structural components include technically sophisticated glass elements with laminated Sefar architecture fabric.

Since the design contract was awarded in 2009, an architecturally fascinating construction has come into being directly on the shores of Lake Constance. In the year 2013, around 250 people have started work here and another 500 should follow shortly.

An upwards spiral

With a market presence today in 80 countries, the headquarters of a screw supplier which set sail 60 years ago with just two employees has “dropped anchor” by the small boat harbor in Rorschach.

Since March 2013, visitors and staff alike have appreciated the greenish-crystalline structure which is flooded with light, open, and transparent. Internally, the building offers generous spatial combinations: working, communication, and relaxation zones, as well as space for exhibitions of art work from the Würth collection.

heading for new shores

The fascinating color and light effects of the lake are reflected in the glass curtain wall with integrated solar panels and “the architecture fits in perfectly with the exis- ting surroundings and landscape,” says CEO Michel Kern of Würth International AG. The winning project from Gigon / Guyer was chosen from twelve entries by national and international architectural practices.

A glazed shell, which switches visually between transparency and reflection,

47 Architecture Architecture 48 WÜRTh RORSCHACH

combined with the constantly reflected uniqueness and beauty of the location, is the public face of the building. Just as the lake is forever changing its outward appearance, so the glass skin captures the reflections of the sky and water surface over the course of the day and the progression of the seasons.

Class behind glass

It is unusual for a building material to create so much openness in architecture. Glass fills space with light and at the same time enables integration with external surroundings. Like no other material, glass creates a “barrier-free” connection between inside and outside. Around 1,750 “VSG Swisslamex Tissue” laminated glass panes – manufactured by Glas Trösch AG, St. Gallen – form around 7,800 m2 of curtain facade surrounding the building. The result is a slender, rhythmically glazed curtain protecting the building not only from lakeside wind and street noise, but also from heat radiation or overcooling.

high expectations from glass processing

The smallest elements have a two-fold structure with 2 × 12 mm semitempered glass (TVG), the largest a three-fold structure with 3 × 12 mm TVG. Single-side aluminum-coated SEFAR® Architecture VISION Fabric AL 140/70 is laminated between the glass panes to control the climatic and in particular the optical functions of the building. All the glass edges are exposed because each glass element is set at a different angle to its neighbor. For this reason, the edges are finished with a special flux before lamination and afterwards – to prevent pockets of trapped air – each pane is individually shrink-wrapped in a vacuum pouch.

49 Architecture WÜRTh RORSCHACH

Würth house Rorschach Administration building, Rorschach, Switzerland www.wuerth.com

Architect Annette Gigon / Mike Guyer Architects, Zurich, Switzerland www.gigon-guyer.ch Glass manufacturer Glas Trösch AG, St. Gallen, Switzerland www.glastroesch.ch Interlayer manufacturer DuPont de Nemours (Germany) GmbH, Neu-Isenburg, Germany www.dupont.com Construction management Walter Dietsche Baumanagement AG, Chur, Switzerland Fabric SEFAR® Architecture VISION Fabric AL 140/70

sEFAR® Architecture VIsIoN Fabric AL 140/70 yarn strength 0.14 mm Mesh opening 70% Material strength (mμ) 140 structure Plain Weave g-value 61.6% Light transmission Tv 61.8%

Architecture 50 Annette Gigon and Mike Guyer

Würth House Rorschach – “Curtain-Wall” Transparency and openness in a prime location

Since the early 1990s, we’ve been trying to insert fabric into glass. Back then we tried brass mesh and later chromium steel. Then a few years ago, we became aware of a new, nonmetallic fabric made from polyester with a metallic coating, which was much easier to work with.

As we had expected, the fabric could reflect sunlight and help keep the building cool, and at the same time form a visual barrier to the outside while permitting a practically unrestricted outdoor view from the inside.

On two recent projects, an office building on Zurich’s Europaallee and the Würth House in Rorschach – an administration and training center – we were able to utilize fabric combined with glass in the form of prefixed and rear-ventilated “storm windows”, which also served as wind and sound protectors in their exposed locations. In one case, the glass and fabric gave off a bronzed, urban hue, while in the other the effect was silvery, green, and “aqueous” owing to its lakeside setting. In both cases, the facade is an interpretation of the “Curtain Wall” – in the literal sense of the words. Annette Gigon

Annette Gigon / Mike Guyer Architects Zurich, Switzerland, www.gigon-guyer.ch

51 Architecture Privacy in Indian open-plan office A healthy arrangement

Architecture 52 MEDLINE PUNE

Medline, one of the world’s largest manufacturers of health-care products supplies hospitals, health-care facilities, and wholesalers. Among its offices is a competence and service center based in Pune, India. Sometimes referred to as the “Oxford of the East”, this pulsating city has around 3.1 million inhabitants and lies about 150 km from Mumbai and the west coast. The task of the architect in charge of this project was to create a pleasant working environment for Medline employees and the regional branch office of this US Corporation opted to use Sefar technical fabric to create an ingenious Medline, Pune, India spatial solution in which it is hard to believe that up to 75 people are actively Architect, general contractor, working. Assembly / implementation Jigsaw Ergo Architects Pvt Ltd., Peace for the eye and the ear Aundh, Pune, India www.jigsawergo.com The American building contractor stipulated the following requirements for the ceiling and interior design: clarity, sEFAR® Architecture IA-85-oP reduced lines, and visible modernity – all Light-technical and acoustic fabric of which would be reflected in the choice of materials used. Jigsaw Ergo Architects Fabric-technical specifications in Pune together with architect Kedar Deo Fabric material selected a fabric with high functional and PVDF (polyvinylidene fluoride), aesthetic values. INTERIOR-Fabric SEFAR® perforated Architecture IA-85-OP possesses excellent Material coating light scattering and echo absorption 100% fluoropolymer properties, and was therefore the ideal Fabric width (cm) 160 answer. Preconstructed SEFAR Weave Plain weave 1/1 ® LIGHTFRAME Modules are simple to surface weight (g/m2) 250 install and can be folded down easily for highest tensile strength warp / maintenance work to the infrastructure weft (N/5 cm): 800/800 above. Suspended from the actual ceiling, according to EN ISO 13934-1 twenty-four seemingly floating highest tensile elongation LIGHTFRAME® Modules, each 1,200 × warp/weft (%) 1,200 mm in size, convey a sense of 35/20 according to EN ISO 13934-1 privacy and the individual work stations Tear propagation force warp / are evenly illuminated. The pleasantly weft (N) gentle light and optimized spatial 30/45 according to DIN 53859-5 acoustics make long working days in a Fire performance busy office infinitely more agreeable. B1 according to DIN 4102; B-s1, d0 according to DIN EN 13501-1 Light-technical specifications Grade of transmission (%) ≥ 85 according to ASTM D1003 Degree of reflection (%) 14 Absorption (%) 1

53 Architecture Architecture 54 WEsTEND GATE FRANKFURT

The Frankfurt skyline stays A new start for Westend Gate

At one time the tallest building in Büro Center”–shapes the city skyline. standards of office space in the renovated Germany, Westend Gate remains to this Little by little, other buildings are being building match that of a new construction. day a significant feature on the Frankfurt constructed in the immediate skyline. Following extensive renovation, surroundings. Financial service providers, A successful outlook the skyscraper constructed in 1976 is now tax advisors and auditors, legal firms, even more attractive for both investors and management consultancies, IT and The combination of solid tradition and tenants. The 159 m (521 ft) building stands software businesses, energy companies, trendsetting renovation under the premise in the midst of a thriving district with and many other commercial enterprises of sustainability is an exemplary model for excellent transport connections and like a have made their home here. Westend the many office buildings yet to be beacon, the 47-story, three-tower Gate has always led the way: upgraded to constructed. On one side, the view across complex – formerly known as the “Plaza the latest specifications, the quality Frankfurt’s banking district is

55 Architecture Prestigious light ceiling elements provide harmonious lighting in the entrance hall.

Architecture 56 WEsTEND GATE FRANKFURT

Westend Gate Frankfurt

Client Aberdeen Immobilien Kapitalanlagegesellschaft mbH Architect Just Burgeff Architekten GmbH, unobstructed, while in the other direction have been made with curved profiles. The Frankfurt, Germany the green Taunus mountain range can be prestigious entrance hall is fitted with a www.just.burgeff.de seen in the distance. A wide range of lower layer of SEFAR® Architecture IL-80- Project partner businesses operate from here and take full OP and above it a layer of light-scattering, Schmid GmbH, Weiler-Simmerberg, advantage of the markedly flexible spatial white ETFE membrane. Germany, www.schmidgmbh.de concept, close to the districts of City West and “Europaviertel.” In additionto this, the wall elements in the external smoking area – in itself a first sEFAR® Architecture IL-80-oP The high art of lightness within the auspices of the renovation Light-technical fabric project – are made using twelve Striking yet elegant is the image presented individually printed SEFAR LIGHTFRAME® Fabric-technical specifications to Westend Gate tenants and visitors ceiling elements, which together create a Fabric material today, and its facades are clad with 10,500 nature motif. PVDF (polyvinylidene fluoride) emerald green, shimmering solar panels. Material coating Ceiling solutions have been installed in the 100% fluoropolymer interior of this skyscraper, which fulfill the Fabric width (cm) 160 requirements of fire safety and durability, Weave Plain weave 1/1 as well as being easy to dismantle and to 2 surface weight (g/m ) 250 refit. Frankfurt-based architects Just highest tensile strength Burgeff took into account the desire for a warp/weft (N/5 cm) 1,050/1,050 lighter atmosphere and in partnership with according to EN ISO 13934-1 fabric tailoring specialists Schmid GmbH highest tensile elongation from Simmerberg, Germany, chose warp/weft (%) membranes made, in this case, from 40/25 according to EN ISO 13934-1 SEFAR® Architecture IL-80-OP. The light Tear propagation force ceiling with trapezoidal elements warp/weft (N) integrated as lightframe into the 35/50 according to DIN 53859-5 suspended plasterboard ceiling ensures Water column (mm) > 500 even illumination of the light fields on the Fire performance individual floors through an optimized B1 according to DIN 4102; frame construction. A distinctive feature B-s1, d0 according here is that some of the frame elements to DIN EN 13501-1 Light-technical specifications Grade of transmission (%) > 80 according to ASTM D1003 Degree of reflection (%) 19 Absorption (%) 1

57 Architecture oFFICE BuILDING UDINE

Udine plates office building in Visionary facade design

When architecture applies itself to urban classic window wall and the high-tech Vision diffuser transformation, it is often the result of a glass casing. The linking elements are desire for regeneration. This is certainly the metal crosspieces which also enable The astonishing golden facade is visible case in the Italian city of Udine, in a mixed window areas and the outer layer to be until the sun goes down, capturing street area outside the town center, where a row cleaned and serviced. scenes, the position of the sun and clouds, of anonymous and inhomogeneous the unfolding weather – always displaying business units, shops, and private houses Glass-like skin gives city a new face something different depending on the has stood since the 1990s. Today there is angle of the light. At the same time, the an ultramodern, elegant office building – In designing the facade elements, the sun’s rays are reflected and their heating the “Cquadro Executive Building” which architects from Studio Guerini, Udine, effect considerably reduced. The air lends a new sparkle and gives a new face chose an attractive option by bringing the conditioners have less work to do, thus to the district where it stands. interaction between building and saving energy and protecting the environment to the fore: SEFAR® environment. Practically unaffected, The administration building with a total Architecture VISION. In sections of the however, are the views from within and floor space of around 4,500 m2 was facade, the black, open-mesh Sefar the natural light quality. constructed on a previously empty plot precision fabric coated on one side in and now sits comfortably between villas aluminum and inlayed between Sentry- and other less prestigious structures. In a Glass® membranes is additionally finished subtle way, the facade takes on the in a gold tone. moveable parts of the familiar silhouette, with recessed sections and frontages Laminated into the glass elements, the reaching to the street, deliberately textile structure creates an almost mirroring the characteristically uneven perceptibly gentle overall impression. cityscape. In this way, the complex cleverly Those working in the building are orients itself to the height of the immediately impressed by the visual surrounding buildings – and has a glass appearance as well as other aspects of the casing on top only from the height of the design including the climatic effect caused second upper floor. in part by measured amounts of sunshine Cquadro penetrating the fabric, as well as the Executive Building This superior facade consists of two fronts natural air circulation between the two udine, Italy arranged one behind the other – the facade elements. Architect Studio Guerini, Udine, Italy Glass manufacturer BGT Bischoff Glastechnik AG, Bretten, Germany www.bgt-bretten.de Facades Baesso srl

sEFAR® Architecture VIsIoN AL 260/55, printed (gold tone) sEFAR® Architecture VIsIoN AL 260/55

Material thickness (mµ) 260 Mesh opening (%) 55 g-value (%) 53.9 Light transmission Tv (%) 49.9

Architecture 58 oFFICE BuILDING UDINE

Udine plates office building in

59 Architecture CANToNAL BANK SCHAFFHAUSEN

Open skies at a Swiss bank with tradition

Architecture 60 Open skies at a Swiss bank with tradition The cantonal bank in a new light

61 Architecture Architecture 62 CANToNAL BANK SCHAFFHAUSEN

schaffhausen cantonal bank

Contractor Schaffhausen cantonal bank, Schaffhausen, Switzerland www.shkb.ch Architects Meyer Stegemann Architects, Schaffhausen, Switzerland www.meyerstegemann.ch Material and color concept / special architectural issues Weissfeld, Stein am Rhein, Switzerland, www.weissfeld.ch Photos Roger Frei architectural photography, Zurich, Switzerland www.rogerfrei.com Project partner Schmid GmbH, Simmerberg, Allgäu, Germany www.schmidgmbh.de

Young, fresh, and dynamic is once more with light. For the client, the Schaffhausen the impression customers get when they cantonal bank, a high priority was to arrive in the large, bright hall at the redesign the entrance area by underlining headquarters of the Schaffhausen cantonal the distinctly sculptured style, making the bank. The innovative solution created by counter area – the heart of the building – Meyer Stegemann architects gives the visibly modern and welcoming, and impression of an open sky with daylight improving lighting conditions and spatial now shining directly into the pool of the acoustics. building’s integrated fountain. With the help of a model, photo Originally designed by the late Swiss compositions, and an extensive concept, architect Walter Maria Förderer, whose Büro Meyer Stegemann in Schaffhausen work included the University of St. Gallen was able to cover different spatial aspects, and other Swiss and German sacred impressing the client and president of the buildings, this much respected bank was Building Commission, as well as monument beginning to look in need of a makeover. conservators. Significant project components included a materials and color concept Modern geometry once again developed in collaboration with Weissfeld in Stein am Rhein, a new approach to Förderer made his name with exposed handling incoming light, and consideration concrete, polygonal layouts, ingeniously given to modern energy requirements. joined spaces, the interplay of open and closed surfaces, and unusual techniques

63 Architecture CANToNAL BANK SCHAFFHAUSEN The translucent ceiling solution is airy and bright. Different membrane levels create a sense of additional space.

sEFAR® Architecture IA-80-CL Light-technical and acoustic fabric

Fabric material PVDF (polyvinylidene fluoride) Fabric width (cm) 270, 340 Weave Twill 1/3 surface weight (g/m2) 440 highest tensile strength warp/weft (N/5 cm) 1,800/1,000 according to EN ISO 13934-1 highest tensile elongation warp/weft (%) 35/27 according to EN ISO 13934-1 Tear propagation force warp/weft (N) 40/80 according to DIN 53859-5 Fire performance B1 according to DIN 4102; B-s1, d0 according to DIN EN 13501-1 Light-technical specifications Grade of transmission (%) > 80 according to ASTM D1003 Degree of reflection (%) 19 Absorption (%) 1

A focus on the essentials Ceiling Solution with SEFAR® Architecture IA-80-CL to ensure a gentle, balanced light, With the floors and gallery balustrades to impart a sense of vastness, and to originally in limestone, the ceiling underline the dimensions of the hall with undersides made from bronze elements, a free and generous primary separation of and the walls covered in wood, its special the light surfaces. Different membrane attraction now lies in reduction and a large- levels convey additional spaciousness and scale dispensing with wood and bronze. the ceiling appears porous and light. In this Different structured Plexiglas cuboids form way, SEFAR® Architecture IA-80-CL the ceiling composition with a small improves spatial acoustics while allowing number of carefully selected materials the integration of artificial light and the ensuring homogeneity, optimizing optics, fine-tuning of colors. Over any distance, and impressing with their energy-saving discretion is assured. advantages.

Better use of daylight

Today, the channeling of light brings a new dynamic to the two-floor teller area. To achieve this, the planners recommended replacing the old skylight and spanning the ceiling of the hall with translucent material. The choice fell to SEFAR LIGHTFRAME®

Architecture 64 65 Architecture Driving air upwards

Architecture 66 VENTILATIoN ToWER OSLO

Sefar now on the road too

Norway is well-known for its unspoilt nature and deep fjords, and now too for a special tunnel. Of course, the tunnel itself is underground but a striking ventilation tower has now been added to the city skyline of Oslo.

Like many large European or world cities, the Norwegian capital also struggles with rising levels of traffic and the air pollution associated with it. Especially affected are major intersections, and as the traffic increases so the skyline changes – in the case of Oslo, however, in a positive way. The Norwegians were very keen to come up with a solution which demonstrated the Scandinavian lightness of touch, blended naturally into the landscape, and made downtown Oslo a little more peaceful again. Driving The Norwegian Highways Authority drew its own conclusions and constructed a much utilized inner-city tangential beneath the earth. For the obligatory ventilation shaft extracting air from the tunnel, Textil Bau GmbH from Hamburg, the general air contractor also responsible for engineering, agreed on a design using technical fabric. Both the client and general contractor appreciated the effect the extracted gases would have on the shaft, so took steps to make the task of upwards maintenance and cleaning as straightforward as possible. With this in mind, SEFAR® Architecture TENARA® Fabric 4T40HF was chosen for its exceptional dirt-repellent and self-cleaning properties.

New grandeur shapes skyline

With a membrane surface area of approx. 340 m2, a height of 19 m, and up to 6.4 m in diameter, the membrane tower is an outstanding eye-catcher. A primary galvanized steel construction forms the

67 Architecture framework for the pretensioned membrane covering which is secured to the upper steel ring of the structure and to a ring of concrete at the base. Depending on the level of ventilation, the tower must be able to withstand internal wind speeds of up to 20 m/s (45 mph). For this reason, the membrane is supported by horizontal floating rings – steel rings with hollow square profiles – which form the two central points dividing the membrane into three equal sections. But achieving the desired chimney effect required one more thing: the external membrane tabs at the base also had to be clamped at the angular section to secure a connection to the concrete ring. Only then was the tower airtight.

To protect the fabric from vandals, the bottom third of the membrane was surrounded by a fence which will be painted green later, giving the tower a sense of having “grown” within its urban surroundings.

Architecture 68 VENTILATIoN ToWER OSLO

69 Architecture Architecture 70 VENTILATIoN ToWER OSLO

Ventilation Tower oslo, Norway

Contractor Norwegian Highways Authority Planning ib zapf, Strausberg, Germany, www.ib-zapf.com Engineering Textil Bau GmbH, Hamburg, Germany, www.textilbau.de Tension rods Pfeifer Seil- und Hebetechnik GmbH, Memmingen, Germany www.pfeifer.de Tailoring K. Daedler e.K., Trittau, Germany www.daedler.de Assembly IRA GmbH, Neudietendorf, Germany, www.ira-gmbh.com

sEFAR® Architecture TENARA® Fabric 4T40hF Light-technical fabric

Fabric-technical specifications Fabric material Fluoropolymer-coated fabric made from ePTFE fibers Fabric width 1.575 m Fabric thickness 0.55 mm surface weight 1,080 g/m2 highest tensile strength (AsTM D4851) Warp 4,000 N/5 cm Weft 4,000 N/5 cm Trapezoidal tear resistance Warp 798 N Weft 752 N Fire performance EN 13501 B-s1, d0 ASTM E84 – Class A NFPA 701 – Small Scale – Pass Light-technical specifications Grade of transmission 38% (ASTM D1003, average 450–650 nm) Degree of reflection 59% Absorption 3%

71 Architecture Architecture 72 sCIN GALLERy LONDON

Sefar is state of the art Exhibits are part of the SCIN Gallery in London

What material would be best for my knowledge. As an architect, I come with of filtration materials. When I requested design? Which suppliers are innovative? Is specialist knowledge and know the some samples, I received a fantastic box there a completely new way perhaps? difficulties my professional colleagues have full of a huge array of technical fabrics. I Architects and planners in Great Britain to deal with and at what point these will wasn’t so interested in fabrics at the time have made an important discovery in their interfere with the implementation of their but Sefar showed me a whole new world! search for suitable surface materials for plans. interiors and exteriors: the SCIN From that moment on, I was telling (pronounced ‘skin’) Gallery is an From our point of view, technical architects about this innovation from the exhibition – a collection of ideas – fabrics provide innovative planners filtration industry which had so impressed featuring the very latest in architecture and architects with a lot of me. On top of that, I presented Sefar at materials by leading suppliers. Sefar is also opportunities. how do you see the the Surface Design Show 2008 in London represented in many of these exhibits. future in this regard? and reported on my discovery in the We’re not actually talking about a new renowned journal FX Design. We spoke to manager Annabelle Filer, discovery here, but the sum total of architect, lecturer, and appraiser of the technological progress. Having said that, you currently feature the fabrics many outstanding surface materials surfaces are becoming more important sEFAR® Architecture VIsIoN CR140/50 rivaling for a place under the roof of the because they constitute far more than just crushed, VIsIoN Cu 260/25, and SCIN Gallery she runs together with structure or decoration. Technical fabrics VIsIoN Cu 140/70. What do you architect Graham Cox. have become experts at multitasking! think is the difference between sefar Fabrics now have uses in building services and the other items in your selection? Annabelle, when it comes to design technology, collecting energy and winning To us, SEFAR® Architecture VISION is highly and architecture, your name usually back heat as well. relevant to the architecture market. The crops up very quickly. how did you successful symbiosis of technical, as an architect decide to get so I reckon that sooner or later we’ll have application-related, and creative uses, involved with surfaces and to offer a hybrid energy collectors, microfine mono- augmented by various coatings and colors, consultancy service as well? layer membranes for facades, and CO2 is something which really appeals to Annabelle Filer: The job description of neutral solutions which will be as familiar architects. The areas of application – an architect encompasses the whole area to us as brick and glass. whether in glass facades or interior design of design and many architects go on to – are amazingly diverse. deepen the understanding they gained how did you discover sefar for while studying and through their first yourself? In interview with Annabelle Filer, professional experiences by entering A product design company commissioned sCIN Gallery completely new fields of activity. The thing me to conduct some research into The SCIN Gallery, Morelands, which initially attracted me to architecture technical textiles back in 2007. At the time, 27 Old Street, London, EC1V 9HL was an interest in illustration and materials the largest retail chain in the USA was coupled with the desire to find out more looking into the possibility of transporting about those different materials. What I do lasagne from place to place in thermal today is at least as creative and bags and they needed a strong and air- demanding – in a similar way to an permeable material for the outer layer. engineer, I see myself supporting architects That’s when I came across Sefar, who was and designers, actively broadening their already known to me as a manufacturer

73 Architecture Preview In the next issue of “Sefar Architecture” we will be reporting on …

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Artist’s impression of SBB Bern Wankdorf sBB Bern Wankdorf Central this purpose, membranes made from With the creation of two new office finished SEFAR® Architecture TENARA® buildings at “Wankdorf City” on the 4T40HF Fabric will be clamped to a wind outskirts of Switzerland’s capital, the Swiss suction mounting above steel girders and National Railway (SBB) is drawing various attached to the eaves with adjustable administrative locations into one new aluminum profiles. headquarters. The facade consists of 6,200 moveable, colored glass slats. Laminated suurstoffi Rotkreuz, switzerland in the sun and privacy shield elements, the In the new Suurstoffi district – where until Sefar Architecture ® Experiences, ideas, plain or color-printed SEFAR Architecture the mid 1980s pure oxygen was and new ways with architecture fabrics VISION Fabric lends the structure a produced – there are now three constantly changing appearance independent structures differing in terms throughout the course of the day. At the of cubage, materiality, and color scheme, same time, the open-mesh fabric gives but together forming a mixture of those inside the building an almost commercial space and residential units. unrestricted view outside. The eastern building now houses the (2) headquarters of Novartis Switzerland Local train hub at Graz Main station whose glass curtain facade contains The “Graz Main Station 2020” project in 3,400 m2 of SEFAR® Architecture VISION Austria includes a hub for local train Fabric. services as well as the development of infrastructures such as the north and south ends of the station, the adaptation of the platforms and railway tracks, and the Issue 1 (top) was published in November extension of the platforms. Wave-shaped, 2011 and Issue 2 in October 2012. futuristic-looking roofs above the platforms will provide passengers with protection from wind, rain, and snow. For

Architecture 74 sefar AG Architecture Hinterbissaustraße 12 9410 Heiden Switzerland Phone +41 71 898 56 17 [email protected] office North America Sefar AG, North America Office Mr. Peter J. Katcha 446 2nd Street North Saint Petersburg, FL 33701 USA Phone +1 727 388 49 19 [email protected] office Asia Mr. Chetan Doshi Sefar AG, Rep. Office 104/105 Gayatri Complex Mittal Ind. Estate Compound Andheri Kurla Road, Andheri (E) Mumbai 400 059 India Phone +91 22 408 080 80 [email protected] office Middle East HTF – Hightech Fabrics JLT Mr. Clemens Pongratz HDS Tower 2809 P.O. Box 333598 Dubai United Arab Emirates Phone +971 50 9419744 [email protected] office Australia architectural textile systems Mr. Luke Seaborn P.O. Box 885 Samford Qld 4520 Australia Phone +61 (0) 420 699 953 [email protected] www.sefar.com www.tenarafabrics.com