The Sky Garden 20 Fenchurch Street, London EC3M 3BY Landscape Contractor Willerby Landscapes Ltd Concept Landscape Architect & Design Gillespies Technical Landscapes Architect Applied Landscape Design Client Canary Wharf Group & Land Securi es Plc Main Contractor Canary Wharf Contractors
Crea ng a Sky Garden March 2015 CONTENTS
SITE MAP / LOCATION 3 INTRODUCTION 4 MASTERPLAN—THE CONCEPT 5 MASTERPLAN—PLANT SCHEDULE 6 PREPARATION: PRE‐CONSTRUCTION 7 PROCUREMENT 8 KEY MILESTONES 9 OFF‐SITE MOCK UPS 10 CONSTRUCTION: SOILS 12 PLANTING 13 STONE WALLS & PAVING 14 THE TREE LIFT 15 IRRIGATION 16 BESPOKE MOVABLE PLANTERS 17 COMPLETION 18 THE GROUND FLOOR: THE GREEN WALL AND ELMS 19
APPENDICES: CLIENT & CONSULTANTS 20 1. TEST & INSPECTION PLANS 21 2. WILLERBY DESIGN & BUILD 22 3. DETAILED SPECIFICATIONS 23 4. PRACTICAL COMPLETION CERT 25
Page 2 SITE MAP / LOCATION:
The Sky Garden sits on the very top three floors of the 37 storey Fenchurch Street building in the City of London. 20 Fenchurch Street was designed by Uruguayan architect Rafael Viñoly and is affec onately known Velodrome locally as The Walkie‐Talkie because of its dis nc ve shape. The building is 160 m (525 ) making it the fi h tallest completed building in the City of London. Developed by a joint venture partnership between two of the UK’s leading property companies in Canary Wharf Group and Land Securi es, Copper Box 20 Fenchurch Street provides 680,000 sq of offices with unrivalled panoramic views of London. Willerby Landscapes is used to undertaking landscaping challenges on a grand scale. However, the installa on of London’s highest public garden was an altogether different challenge. The Sky Garden was created by a team led by Stephen Richards of landscape architects Gillespies. The brief was to deliver a free visitor a rac on; an excep onal roof garden in the striking architectural space, complemen ng the views of the Thames to the south and the City to the north, offering an environment of lush gardens planted with exo c and unusual plants.
The Sky Garden 20 Fenchurch Street City of London EC3 3BY
Page 3 INTRODUCTION: Five companies were shortlisted to construct the garden and the fixed price contract was eventually
awarded to Willerby Landscapes, who had extensive Gillespies Stephen Richards stated that “The Sky experience of construc ng roof gardens ‘at al tude’ Garden is a striking enclosure that offers a variety of and, not least, could demonstrate their confidence perspec ves on the city and one that we are proud to and experience in working with a tower crane erected be associated with. within a li sha to haul large trees into place. The Sky Garden is a significant addi on to the The shape of this par cular building is very complex as London’s growing list of visitor a rac ons. it curves outwards on all planes, allowing unrestricted
There is nowhere else in the capital the public can get views out and down. such a magnificent perspec ve over London for free.
The scale of the enclosed space alone is impressive par cularly in the densely populated City of London where ground level open spaces of this scale between
buildings are rare.
The task was to ensure there was a balance between catering for large visitor numbers, events, restaurant facili es and the desire for lush planted areas. The planted gardens in the Sky Garden so en the texture of the space and provide in mate contact with unusual and exo c plants. We chose plants that would
be appropriate for the par cular microclimate of the space and would look interes ng all year. We were keen to create something memorable in the mix and diversity of species including plants not o en used in public gardens.” The building and Sky Garden had been on the drawing board at least twelve years before construc on was
completed and the garden was opened to the public in February 2015.
Page 4 MASTERPLAN—THE CONCEPT The Sky Garden at 20 Fenchurch Street sits on the Garden are some of the tallest in Europe; in their very top three floors of the 37 storey building in the natural habitat they can grow to 20m in height and City of London. add 15cm of trunk each year. Mis ng units have been installed to mi gate high an cipated summer The building is just shy of 525 high (160m) and the temperatures for this shade tolerant area of the planted space at the top has its own microclimate. garden. The plan ng pale e was chosen to thrive in the naturally ven lated space and give year‐round From the low light forest area, the slope falls away interest. The design team at Gillespies imagined the steeply and the light increases, allowing mainly space as similar to the tall natural stone outcrops sculptural Cycads to flourish. There are 22 Cycas topped by gravity‐defying trees found in certain circinalis in the garden, each over 100 years old, and ancient forests around the world. six large Cycas revoluta. The crowns of the specimens in the Sky Garden hold nuggets of lava Specialist plan ng consultancy was provided on this project by Growth Industry. Ac ng as a from their previous loca on at the foot of Mount as the sub‐consultant to Gillespies, Growth Industry's role Etna. Cycas Samia furfuracea, known Cardboard Plant, can also be found. included the development of detailed plants species lists to realise Gillespies’ plan ng concepts, design The foot of the slope, which flanks each of the three and produc on of site‐wide detailed plan ng plans, restaurants within the Sky Garden, is the sunniest schedules and specifica ons and input into the area of the garden where plants from Africa, global procurement strategy and technical liaison. Australia and the Mediterranean have been selected Using the concept of the ‘evolu on of plants’, the to provide year round interest. Sky Garden has three zones: shade tolerant forest at Some individual specimens have been chosen for the top, sloping down through a transi on zone, and their spectacular colour at a par cular me of the finishing with flowering plants at the lowest level. year, such as the Watsonia. Colour is very important to the design and the inten on is for the garden to The shaded forest zone, which solar studies of the building indicated would receive the least amount of be rich and full throughout the year, which is why it on of evergreen plan ng. light, features ancient forest‐type plants accustomed contains a high propor to low light condi ons, such as Cythea medullaris or New Zealand tree fern. The ones planted in the Sky
Page 5 MASTERPLAN—PLANT SCHEDULE Sky Garden Planting Schedule Unusually , plant pale e sourced from both northern and southern hemispheres 20 Fenchurch
Street, London
Species Size Potting on size Specification Notes Number Shrubs / Herbaceous Height Spread Agapanthus africanus 'Peter Pan' 3 Lt. 5 66 Trees / Tree Ferns / Palms Agave attenuata 25 Lt. 21 Cyathea medullaris 4.3m 3.5m 6 Beschorneria septentrionalis 10 Lt. 20 Cyathea medullaris 2m 2.5m 7 Alpinia zerumbet 10 Lt. 6 Dicksonia antartica 3-4m 1.4m 3 Anigozanthus 'Dwarf Delight' 5 Lt. 25 Dicksonia fibrosa 2m 3m 5 Crocosmia Rowellane 3Lt seedling 3 Lt. 30 Dicksonia squarrosa 1.2-1.5m 1.4m 7 Crocosmia masoniorum 3 Lt. 5 38 Dicksonia squarrosa 0.9-1.2m 1.4m 4 Dierama igneum 3 Lt. 34 Dicksonia squarrosa 0.6-0.9m 1.4m 12 Dietes bicolor 2 Lt. 7.5 25 Dicksonia squarrosa 2.5m 1.8m 2 Dietes grandiflora 2 Lt. 7.5 37 Dioon spinulosum 150-200 3 Equisetum hymale 5 Lt. 34 Ficus allii 3-4m 1.4m 4 Helianthemum 'Ben Ledi' 2 Lt. 5 32 Ficus lyrata 3-4m 1.4m 6 Kniphofia uvaria 'Nobilis' 3 Lt. 7.5 34 Ficus nitida 3-4m 1.4m 4 Lavandula stoechas 5 Lt. 6 Rhaphis excelsa 1m 1.4m 6 Liriope muscari 'Big Blue' 2 Lt. 5 115 Albizia julibrissin 2 Ophiopogon planiscapus 'Nigrescens' 3 Lt. 5 94 Cyathea medullaris 6-7m 2 Osteospermum 'Buttermilk' 2 Lt. 5 38 Ficus nitida 6-7m 1.4m 2 Stachys byzantina 10 Species Size Specification Notes Number Pelargonium acetosum 3 Lt. 98 Container Height Phygelius aequalis 'Sani Pass' 3 Lt. 7.5 50 Climbers / Epiphytes Pittosporum tobira 'Nana' 5 Lt. 53 40cm speci- 50cm 8 13 Bromeliad fascicularia bicolor 3Lt mens Rosmarinus officinalis 5 Lt. 10 40cm speci- Scabiosa africana 2 Lt. 5 35 50cm 4 Davaillia fijensis 5Lt mens Strelitzia reginae 5 Lt. 66 Ficus pumilla 9cm 8 Thymus coccineus 9 cm 3 45 Microsorum diversifolium 3-4Lt. - 6 Tulbagia violacea 2 Lt. 5 29 40cm speci- Watsonia 'Tresco Hybrids' 3 Lt. 20 50cm 8 Platycerium bifurcatum 5Lt mens Succulents Selaginella wildenowii T.b.c. T.b.c. T.b.c. 2 Sempervirum tectorum 9cm 2 80 Cycads Sedum Mix 1 Cycas circinalis 50 cm 2.5m 2.5m 6 Sedum adolphi (20%) 9cm 2 32 Cycas circinalis 50 cm 1.7m 1.5 - 2m 14 Sedum lineare (20%) 9cm 2 32 Cycas revoluta 80 cm 2m 1.5m 6 Sedum prealtum (20%) 9cm 2 32 Cycas revoluta 50 cm 1.2m 1m 11 Sedum pachyphyllum (20%) 9cm 2 32 Cycas revoluta/cirinalis 50%-50% split 9cm 0.5 - 0.8m 0.5 - 0.8m 36 Sedum rubrotinctum (20%) 9cm 2 32 Zamia furfuracea 50 cm 0.5 - 0.8m 0.5 - 0.8m 52 Sedum Mix 2 Ferns Sedum allantoides (20%) 9cm 2 33 Adiantum aleuticum (30%) 3 Lt. 61 Sedum bellum (20%) 9cm 2 33 Adiantum pedatum (25%) 3 Lt. 49 Sedum morganianum (20%) 9cm 2 33 Adiantum raddianum (25%) 3 Lt. 49 Sedum relexum 'Blue Carpet' (20%) 9cm 2 33 Adiantum raddianum 'Fritz Luth' (25%) 3 Lt. 49 Sedum sieboldii (20%) 9cm 2 33 Asplenium scolopendrium (25%) 5 Lt. 10 62 Crassula Mix Asplenium scolopendrium 'Crispum' (25%) 5 Lt. 10 62 Crassula Blue Hale (25%) 2 Lt. 10 13 Asplenium trichomanes (50%) 3 Lt. 127 Crassula ovata minor (25%) 2 Lt. 10 13 Athyrium nipponicum var. pictum 3 Lt. 5 213 Crassula ovata sunset (25%) 2 Lt. 10 13 Blechnum gibbum 25 Lt. 40 13 Crassula portullaca (25%) 2 Lt. 10 13 Cyrtomium falcatum 5 Lt. 10 78 Groundcover Dryopteris affinis Polydactyla group (50%) 5 Lt. 10 72 Ajuga reptans 'Atropurpurea' 9cm 1 333 Dryopteris wallichiana (50%) 5 Lt. 15 72 Selaginella kraussiana (50%) 9cm 3 150 Polystichum poylbleparum (50%) 10 Lt. 49 Selaginella unciniata (50%) 9cm 3 324 Polystichum setiferum 'Herrenhausen' (50%) 10 Lt. 50 Tradescantia zebrina 'Tricolour' 9cm 337 Page 6 PREPARATION: PRE‐CONSTRUCTION Willerby Landscapes decided very early on that go up the slopes or in a pedestrian li to level 36. the success of this scheme would be down to Training careful and considered planning. In addi on to the exis ng crane teams, Willerby It would be necessary to take me to select the Landscapes also trained addi onal Crane plant material well in advance and monitor their Supervisors, Slingers, Signallers and Spider Crane growth regularly. Nursery visits would be required operators specially for the project in order to to Spain, Sicily, Italy, Holland, Germany and New ensure that they had sufficient competent Zealand. Some plants would be brought into the resources available to complete the installa on. UK early; others would be held in Europe and brought to site on a “Just in Time” basis. Programme The ground floor tree plan ng programme needed Due to the complexity associated with the to be coordinated with the main building works installa on of the roof structure, the construc on and to facilitate this, Willerby Landscapes programme started to slip. In order to assist containerised the trees for the raised planters, programme recovery, the landscape installa on streetscape and the pocket park and stored them programme was cut from 18 weeks to 9 weeks. at their nursery in Edenbridge. This provided This necessitated working two shi s pa erns day complete flexibility on plan ng dates, and became and night, seven days a week. a valuable tool during construc on as they were As li me was to be in high demand by all trades planted over a series of weekends, evenings and working on the scheme, Willerby Landscapes nights. appointed a night crew to take delivery of The soil mixes would require blending, tes ng, materials and distribute them to the required work bagging and storing in the dry in order to ensure areas. consistency on delivery. These deliveries would be Every manoeuvre was carefully med and required out of hours, so night transport permits co‐ordinated into a micro managed programme. to enter London would need reques ng. Detailed design work for the Greenwall, the Sky Garden landings, the retaining walls, Irriga on and mis ng system and the mobile planters would be required, along with samples and mock ups for sign off by the design team for all elements. Logis cs In order to access the Sky Garden, each delivery would be needed to be offloaded adjacent to the site on the ground floor, taken down to the basement in a lorry li , then through the basement on an electric pallet truck and then onto the Sky Garden Goods Li , up to level 35. Having reached this level the material either had to
Page 7 PREPARATION: PROCUREMENT Willerby Landscapes carefully selected a team of implemented before anything was li ed into subcontractors and suppliers for the project. These posi on . were appointed based on who would be best Key Partners suited to provide the level of commitment and quality that a scheme of this nature required. Willerby Landscapes Ltd: Landscape Contractor The decision to partner with certain suppliers such Kelways Plants Ltd: Specialist Tree Fern & as Kelways Plants, Biotecture Ltd and Waterscapes Cycad Nursery Ltd allowed for a consistent approach and single Waterscapes Ltd: Irriga on point of contact to be provided throughout the Deepdale Trees Ltd: All Trees design development and installa on. Biotecture Ltd: Green Wall Design A project of the complexity that the Sky Garden Specialist offered, saw significant delivery challenges due to the nature of the loca on and design specifica on Bourne Amenity Ltd: Ground Floor Soils of a garden situated on the 37th floor of a Topsoil Petersfield: Sky Garden Soils skyscraper Gillespies: Lead Landscape To illustrate the scale of materials required, to be Architect delivered to the top floor, it is worth highligh ng Applied Landscape Design: Landscape Architect key quan es at this stage; Growth Industry: Specialist Plan ng Blended plan ng material 400 tonnes Design Ferns , Shrubs & Herbaceous plants 5,200 Mc Monagle Stone : Stone Walling & Trees 90 Paving Succulents 450
Bulbs 11,000 Sand stone walling & boulders 50 tonnes Detailed planning commenced immediately the contract was awarded in 2012 and Willerby’s project manager Ma Ainscow and his team worked on ge ng the buy‐in of suppliers to ensure every single item was where it needed to be, and when, which was absolutely key to the project’s success. Ma and his team worked closely with Gillespies, Kelways, the building’s owners and a host of contractors to ensure decisions on absolutely every aspect of plant selec on, procurement and delivery; choice of materials for stone walls and paths; plan ng media; irriga on systems; and a host of other items were made, agreed and Page 8 KEY MILESTONES 2011, December Tender Submission 2012, April Awarded contract; A) Willerby Landscapes proposal for plant/material procurement, storage & delivery to top floor B) Design refinement—VE 2012, September Nursery containment chosen 2014, 8th August Tree li through the roof 2014, 1st September Installa on commenced 2014, 14th October Walls and paving laid 2014, 31st October Completed project
May 2015 November 2014
January 2013 November 2013 May 2014 October 2014
Page 9 PREPARATION: OFF‐SITE MOCK UPS
In order to allow sign off for various materials and construc on elements, Willerby Landscapes regularly used mock ups of the elements of the scheme. This allowed the build team an opportunity to work alongside the designers to ensure that they fully understood what is required and expected with regards to both build quality and aesthe cs. For the Sky Garden, Willerby Landscapes provided various walling mock ups and drawings; these allowed the designers to visualise what they thought would work best in the scheme and then adapt the final requirements to their liking. Willerby also completed a crane li mock up; this detailed how they would transport the po ed trees up to the roof and was used to show the crane team on site the li ing methodology proposed. In addi on to other samples, Willerby also fabricated sec ons of the mobile planters in order to demonstrate the workings and the level of finish that should be expected, along with mock ups of the Greenwall at Biotecture.
Page 10 THE SKY GARDEN
Page 11 CONSTRUCTION—SOILS What was originally to be an 18 week installa on achieve programme gain, Willerby specially trained programme was reduced to just 9 weeks, which a crane team and appointed a dedicated night crew meant the Willerby Landscapes team had to work to take in deliveries, haul them from the roadside 24/7 with night deliveries of plants and materials through the loading bay and up to the garden. Each commonplace. bag of soil was then li ed using a spider crane onto Willerby and Anything concerning the infrastructure that could a conveyor system, designed by moved the soil into posi on on the slope. be installed before the glass roof was closed, such as the irriga on system, was completed by the There was minimal storage available and so a ‘Just construc on teams and Willerby staff in exposed, in Time’ system of supply was carefully cold, and windy condi ons, 160m above London. orchestrated to ensure materials were delivered Once the slope had been constructed and the and used almost immediately. polystyrene sec ons installed, 400 IBC bags of topsoil, blended to meet the specifica on and supplied by Topsoil Petersfield, were hauled up at night, ready for the day shi team to spread it. All soil was analysed and approved beforehand so that there was no risk of it not mee ng the specifica on and having to be taken down again. In order to complete the soiling opera on, Willerby would need a significant number of hours usage of the goods li . During normal working hours this was going to be unachievable due to the other trade contractors all working in the same areas. Therefore, in order to overcome this issue and to
Page 12 CONSTRUCTION—THE PLANTING The plan ng design evolved from the early concept some mes oppressive atmosphere of air due to a very detailed climate study that mapped condi oned atrium. This is also be er for pest the par cular condi ons within the glazed control for the garden, as the temperature range enclosure throughout the year. does not encourage infesta ons. The soil is irrigated and misters sustain the ferns. The soil is The landscape designers had to carefully not heated. understand the microclimate from the point of view of varia ons in shade and sunlight levels Solar studies revealed that the tops of the across the terraces and air temperature given the landscape slopes will receive the least amount of space is naturally ven lated. light thus the choice for forest type plants accustomed to low light condi ons. Colour is very important to the design. The inten on is for the garden to be rich and full Mis ng units are provided to mi gate high throughout the year and therefore it contains a an cipated summer temperatures for the shade high propor on of evergreen plan ng. Flowering tolerant area. plants are concentrated to the south of the garden Interes ng Fact to celebrate a floral kingdom. The flowers are on the lower er of the garden that will receive the Cythea medullaris ‐ New Zealand tree fern. One of most light during the year. the tallest growing tree ferns that can a ain 20m in height, and very fast growing for a tree fern The cycads and ferns are rarely seen in a building growing 15cm of trunk every year. Very few plants par cularly on this scale. Sourcing and supply of get exported from New Zealand now, so the ones the plant material was by far the largest project for planted in the Sky Garden are some of the very the specialist nursery Kelway to have been involved tallest in Europe. with. The space is naturally ven lated, a sustainable solu on to a large enclosure that avoids the
Page 13 CONSTRUCTION—STONE WALLS AND PAVING The early design intent was for the landings/ were delivered and benchmark sec ons were terraces to be constructed from a buff coloured installed on site in order to ensure that the sandstone and for the adjacent retaining structures Stonemasons understood the designers to be a series of boulders in a similar material. requirements. As the design developed and the materials pale e Once these elements were signed off, the for the remainder of the building was established, construc on of each area commenced. In order to it became apparent that the boulders were not avoid any individual stonemason style influencing a going to provide suitable soil restraint or sea ng par cular landing, the teams were rotated areas for the visitors and that the intended buff regularly. colour scheme was not working with the other Sky Wall construc on is on video. Type in the Garden elements. below address or use your smartphone to scan the QR code Following the provision of various mock ups and samples, Willerby were tasked in developing the h ps://www.youtube.com/watch?v=OAmnc6r3O6I design for these landing areas; this included structural calcula ons in order to provide a restraint system to prevent the landings from slipping down the slope, a detailed design of each retaining structure/sea ng wall and the sourcing of a stone that would be aesthe cally suitable for the walling, coping and se s. Following discussions with various different suppliers, Willerby elected to work with McMonagle Stone, based in Donegal, Ireland, as they were able to provide, walling, se s, coping stones and boulders in mid grey tones. Samples
Page 14 THE TREE LIFT Willerby Landscapes made the recommenda on, to the client, to source the trees and plants 18 months in advance of the build and store them with a specialist nursery in Somerset and then, when ready, plant the garden nearer to comple on. This was of great value and benefit to the developers who originally designed the build based on storing the plants and trees on the top floor whilst con nuing to finish the construc on around them. This could have poten ally been a risk in the wellbeing of the plants because of the cold and exposed nature of building at such a height. The trees, some as large as 10m, were li ed over 160m onto the top of the building on 8th August 2014 by the tower crane, constructed specifically for the project in the li sha . Before the li , Wilerby Landscapes invited the crane operators and banksmen for a coffee and walked through the process of li ing the trees to the top floor. This engagement, the good weather and low wind speed on the day, enabled all the large trees to be hauled up and lowered through a small gap in the glass roof, then gently manoeuvred into place by men secured to the roof with karibiners.
The tree li is on video. Type in the below address or use your smartphone to scan the QR code h ps://www.youtube.com/watch?v=OAmnc6r3O6I&
Page 15 IRRIGATION Willerby Landscapes have designed and installed This ensures only pure water is expelled into the two separate irriga ons for the scheme, The ground public space, avoiding the spread of bacteria such floor system and Greenwall systems operate as legionella and preven ng corrosion of pipework independently, but u lise the same water storage and metal. tanks and control systems. The irriga on can be operated remotely by smart The Greenwall system includes a remote phone and will be maintained by Willerby’s for the monitoring and control system in order for the dura on of the 16 month defects period. adjust and operate the water maintenance team to Finding the op mum route for the irriga on’s volumes and when they are applied. The system is duc ng and pipework was made possible by using based in a dedicated irriga on plant room within 3D BIM (Building Informa on Modelling) the building basement, all control valves are within schema cs of the building. 20 Fenchurch Street was this loca on and then piped out to each individual the first building in the UK to use BIM so ware and zone. it proved invaluable in a structure of this size and The Sky Garden system also has a dedicated complexity. plant room below the garden, this system irrigates the trees, the ferns and the understory plan ng. and in addi on the systems use reverse osmosis, which extracts all minerals, nutrients and impuri es from the water before it enters the mis ng equipment. These mis ng units were designed by Willerby to be telescopic so that they can be raised in height up to 7m as the trees within the garden grow and are operated automa cally in order to control the humidity levels within the garden to 75% humidity which helps to cool the area in the summer by five degrees.
BIM 3D Modelling
Page 16 BESPOKE MOVABLE PLANTERS Willerby Landscapes designed and fabricated four large mobile planters for use on the upper Sky Garden terrace. The planters are designed so that they can be posi oned in different loca ons within the garden subject to what events are being held. Structural calcula ons were completed in order to establish the sizes and capacity of the proposed wheels and in order to mi gate the risk of overturning. Each planter is consists of a stainless steel outer shell that is supported on a ring of load bearing wheels with a central telescopic brake. Each planter can be wheeled into posi on and set into a parked posi on by lowering the central brake. Within each planter is a 4m tall Ficus ni da and under‐plan ng of ferns.
Page 17 SKY GARDEN COMPLETION
Page 18 THE GROUND FLOOR: THE GREEN WALL AND ELMS Opposite the south face of 20 Fenchurch Street sits the panel below and subsequently over watering an annex building and the largest Greenwall in the lower sec ons of the wall. London containing over 48,000 plants. In order to The irriga on system is both monitored and create this structure Willerby teamed up with controlled remotely in order to ensure that the Biotecture u lising their hydroponic Greenwall water usage in minimised wherever possible. system. The Street trees, raised planter trees and pocket The plant pale e and final layout pa ern was park trees are a selec on of Ulmus, Prunus and following detailed discussions with the developed Amelanchier. These trees were selected by the nursery and design team at Gillespies. client and designers in Germany and brought to the The wall is constructed using a series of containers UK to be containerised. The Elms were installed as each pre planted in a nursery. The panels are fixed part of the wind mi ga on strategy. to a temporary wall in order to start the growing The plan ng was carefully coordinated in order to process and then once established they are coincide with various road closures and pedestrian on flat trays and trolleys for dispatched to site diversions. Two of the trees within the pocket park installa on. could not be planted un l very late in the build due The base wall structure is recycled plas c backing to an access pla orm being directly adjacent to the board fi ed to a steel frame, this is over laid with a tree pit and a canopy over it preven ng overhead thin drainage layer that allows any excess irriga on access. the water to drain out of the plan ng boxes and to In order to plant these trees, Willerby arranged for base of the wall. a crane to li a large tele‐handler over a security Each planted panel is open at the top and to the cordon and into the pocket park. The trees were rear with an enclosed base, an irriga on drip line then crane li ed as close to the canopy as possible runs above each horizontal row of panels and emits and these were then planted under the obstruc on water into the panel; most of this is taken up by the using the tele‐handler to li them into place. plan ng and any excess drains to the base of the box and then out to the rear. This eliminates excess irriga on water soaking into
Page 19 APPENDICES: CLIENT & CONSULTANTS Please note we have only printed a selec on pages of the specifica ons relevant to this programme due to their length and content.
Page 20 APPENDICES: 1. TEST & INSPECTION PLANS
Page 21 APPENDICES: 2. WILLERBY DESIGN & BUILD
Page 22 APPENDICES: 3. DETAILED SPECIFICATIONS ‐ EXTRACTS FROM CONTRACT DOCUMENTS
Page 23 APPENDICES: 3. DETAILED SPECIFICATIONS ‐ EXTRACTS FROM CONTRACT DOCUMENTS
Page 24 APPENDICES: 4. CERTIFICATE OF PRACTICAL COMPLETION
Page 25 Page 26