Norwegian Building Research Institute P.O.Box 123 Blindern NO-0314 Oslo Norway Tel. 47 22 96 55 55 Fax 47 22 69 54 38 E-mail: [email protected] Internet: www.byggforsk.no

Authorised and notified according to Article 10 of the Council Directive 89/106/EEC of MEMBER OF EOTA 21 December 1988 on the approximation of laws, regulations and administrative provisions of Member States relating to construction products

European Technical Approval No. ETA-04/0059 This ETA replaces the previous ETA with the same number and validity from 21.09.2004 to 21.09.2009

Trade name: Hedalm Anebyhus Timber Frame Building Kits

Holder of approval: Hedalm Boliger AS NO-2344 Ilseng Norway Tel. + 47 62 58 13 33 Fax+ 47 62 58 13 88

Generic type and use of construction product: Timber frame construction kits for low rise housing and similar building structures

Valid from: 15.03.2006 to: 21.09.2009

Manufacturing plant: Hedalm Boliger AS NO-2344 Ilseng Norway

This European Technical 18 pages including Annex A. Annex B (standard Approval contains: construction details) is published as a separate document. Both annexes form an integral part of the ETA

European Organisation for Technical Approvals

European Technical Approval No. 04/0059 Page 2 of 18

TABLE OF CONTENTS page

I LEGAL BASIS AND GENERAL CONDITIONS

II SPECIFIC CONDITIONS OF THE EUROPEAN TECHNICAL APPROVAL

1 Definition of the product and intended use 1.1 Product description 4 1.2 Intended use 4

2 Characteristics of the product and methods of verification 2.1 ER 1 Mechanical resistance and stability 5 2.2 ER 2 Safety in case of fire 6 2.3 ER 3 Hygiene, health and environment 6 2.4 ER 4 Safety in use 7 2.5 ER 5 Protection against noise 7 2.6 ER 6 Energy economy and heat retention 8 2.7 Aspects of durability 8 2.8 Aspects of seviceability 8

3 Evaluation of conformity and CE-marking 3.1 Attestation of conformity 9 3.2 Responsibilities 9 3.3 CE marking 10

4 Assumptions under which the fitness of the product for the intended use was favourably assed 4.1 Design 10 4.2 Manufacturing 10 4.3 Foundations 10 4.4 Installation 10

5 Recommendations 5.1 Packaging, transport and storage 11 5.2 Maintenance 11

Annex A A1 Design of Hedalm Anebyhus Timber Frame Building Kits 12 A2 Material specifications for Hedalm Anebyhus Timber Frame Building Kits 16 A3 Span tables for floor joints of solid timber 18

Annex B Standard Construction Details (separate, supporting document) European Technical Approval No. 04/0059 Page 3 of 18

I LEGAL BASIS AND GENERAL CONDITIONS

1 This European Technical Approval is issued by Norwegian Building Research Institute (NBI) in accordance with the:

- Council Directive of 21 December 1988 on the approximation of laws, regulations and administrative provisions of Member States relating to construction products (89/106/EEC)1,

- Common Procedural Rules for Requesting, Preparing and the Granting of European Technical Approvals2.

- Guideline for European Technical Approval No. 007 Timber Frame Building Kits, edition April 2001.

2 Norwegian Building Research Institute is authorised to check whether the provisions of this European Technical Approval are met. Checking may take place in the manufacturing plant. Nevertheless, the responsibility for the conformity of the products to the European Technical Approval and for their fitness for intended use remains with the holder of the European Technical Approval.

3 This European Technical Approval is not to be transferred to other manufacturers or agents of manufacturers than those indicated on page 1.

4 This European Technical Approval may be withdrawn by Norwegian Building Research Institute according to Article 5.1 of the Council Directive 89/106/EEC.

5 Reproduction of this European Technical Approval including transmission by electronic means shall be in full. However, partial reproduction can be made with the written consent of Norwegian Building Research Institute. In this case partial reproduction has to be designated as such. Texts and drawings of advertising brochures shall not contradict or misuse the European Technical Approval.

6 This European Technical Approval is issued by the approval body in English. Translations into other languages have to be designated as such.

1 Official Journal of the European Communities N° L40, 11.2.1989, p. 12 2 Official Journal of the European Communities N° L17, 20.1.1994, p. 34 European Technical Approval No. 04/0059 Page 4 of 18

II SPECIFIC CONDITIONS OF THE EUROPEAN TECHNICAL APPROVAL

1 Definition of the product and intended use

1.1 Product description Hedalm Anebyhus Timber Frame Building Kits are predesigned building kits consisting of walls, suspended floors and roof structures. The kits are prepared in the factory for each individual house, delivered as a package, and assembled on site. Exterior walls are based on standard size prefabricated elements. Interior walls and suspended floors are assembled from precut members, and roof structures are based on prefabricated trussed rafters.

The basic design of the assembled components are shown in Annex A1. Material and component specifications are shown in Annex A2. Detailed design specifications including connections between components and assembly details are shown in the supporting document Annex B: Hedalm Anebyhus Timber Frame Building Kits. Standard Construction Details. Supplement to ETA no. 04/0059. Annex B is a formal part of the ETA, and the valid version of the document is the latest version filed by the Norwegian Building Research Institute.

The kits covered by this ETA consist of the main building parts of residential houses as described in the ETA, and include load-bearing structures, thermal insulation, air- and moisture control layers, claddings, sheathing and internal linings.

Windows, doors and complementary parts like surface coverings, stairs, balconies, internal fittings, technical installations for water, heating, ventilation and other components which are necessary to form a complete house are not part of the approval. This include also supplementary load-bearing components like special beams, columns to carry special concentrated loads in accordance with the structural analysis worked out for each separate house.

The load-bearing structures of the building kits are based on solid wood members with standard spacing c/c 600 mm in both walls , floors and roof.

1.2 Intended use The intended use for the kits is residential houses of maximum 3 stories. The houses may be single family, or multifamily, with the housing units separated vertically and/or horizontally. Typical cross- sections as shown in the figure below. The building kits may also be used for non-residential applications when the performance requirements are the same as for residential houses.

One storey without basement Two stories without basement Two stories and partly basement

One storey with basement Two stories with basement Three stories and partly basement

Typical sections of houses build with Hedalm Anebyhus Timber Frame Building Kits. European Technical Approval No. 04/0059 Page 5 of 18

The building kits may be used in central and northern Europe, except for sites in high mountain areas with extreme driving snow conditions. In southern Europe where cooling systems may be installed and used for long periods of time the kits should not be used unless the risk of interstitial moisture condensation has been assessed for each individual site and use conditions.

Kits with external walls using rendered claddings should be restricted to areas where this design is known to perform satisfactory with respect to driving rain resistance.

The wood components are not treated for use in areas with termite attacks.

No special verification of structural resistance related to seismic actions has been determined.

The kits are intended to be placed on all types of ordinary foundations like concrete slabs on ground, masonry or concrete basement walls, or strip foundations.

2 Characteristics of the product and methods of verification The characteristics given in this chapter are applicable to all combinations of materials, components and dimensions described in this ETA if no other provision is specified.

2.1 Mechanical resistance and stability (ER 1) The kits have the following load bearing design capacities, determined by calculation according to 3 EN 1995-1-1 , using partial factor γM = 1.3 for material properties at ultimate limit state and γM = 1.0 for serciceability limit state. Modification factors kmod and kdef as recommended in EN 1995-1-1 for service class 1 have been applied.

2.1.1 Walls Design capacity at ultimate limit state:

External walls Vertical load only, long term duration, - walls without openings 46.8 kN/m - with wall openings ≤ 1.2 m wide* 17.0 kN/m Vertical load only, medium term duration, - walls without openings 53.5 kN/m - with wall openings ≤ 1.2 m wide* 19.4 kN/m Vertical load combined with 1,35 kN/m² horizontal windload, short term duration, incl. wall openings ≤ 1.2 m wide* 30.1 kN/m Horizontal windload perpendicular to the wall, short term duration 3.2 kN/m² Racking strength, short term duration, for min. 1.2 m long parts without openings 3.3 kN/m

Internal load bearing walls Vertical load only, long term duration, - walls without openings 17.1 kN/m - with wall openings ≤ 1.0 m wide* 13.0 kN/m Vertical load only, medium term duration, - walls without openings 19.6 kN/m - with wall openings ≤ 1.0 m wide* 14.8 kN/m * with standard beams over openings

3 The reference to EN 1995-1-1 in this document means reference to prEN 1995-1-1:December 2003. The approval will be modified when EN 1995-1-1 is finally published, if technical amendments make this necessary. European Technical Approval No. 04/0059 Page 6 of 18

The corresponding design capacities at seviceablity limit state have been checked, and satisfy the following deformatiom criteria under maximum total load: - Deflection in bending, all members; < 1/200 of span - Compression perpendicular to grain at stud/plate connections; < 2 mm - Horizontal movement at wall top under racking load; < 5 mm

2.1.2 Suspended floors Maximum imposed load capacity is shown in Annex A3. The values are based on calculations using the following partial load factors:

γG = 1.20 for permanent actions (self weight) γG = 1.50 for imposed, variable actions

The final deflection is < 1/200 of the maximum span under total permanent and imposed uniformly distributed load with spans according to Annex A3. See also cl. 2.8.

2.1.3 Roof structures The structural design of roof trusses are made individually from case to caset in accordance with EN 1995-1-1 and national standards for the relevant snowloads, windloads and imposed loads, taking into account national determined parameters.

2.2 Safety in case of fire (ER 2) 2.2.1 Reaction to fire Classification according to EN 13501-1 of the components in the assembled kits are shown in Annex A2. The classifications are based on individual verifications made for each component.

2.2.2Resistance to fire Standard wall and suspended floor designs shown in Annex A1 have the following resistance to fire according to EN 13501-2: - External walls with mineral wool insulation: REI 30* - Internal walls EI 15 - Internal load bearing walls with insulation REI 15** - Separating walls EI 30 - Suspended floors REI 15*** - Separating floors REI 30*** * Maximum vertical load at serviceability limit state is 15 kN/m ** Maximum vertical load as stated in cl. 2.1.1 *** Maximum design load as stated in Annex A3

Resistance to fire is partly based on full scale testing and partly on calculations according to prEN 1995-1-2:2003. The resistance to fire for roofs are determined from case to case together with the individual structural design.

2.2.3 External fire performance of roof covering Roof covering is not part of the kits, and verification of external fire performance has to be verified separately from case to case.

2.3 Hygiene, health and environment (ER 3) 2.3.1 Vapour permeability and moisture resistance Water vapour resistance of the water vapour control layer used for the external envelope inside the 9 thermal insulation is 360·10 m²sPa/kg (sd = 70 m).

Water vapour resistance of the wind barrier layer (fibreboard sheathing) outside the thermal insulation 9 is 0.8·10 m²sPa/kg (sd = 0.16 m). European Technical Approval No. 04/0059 Page 7 of 18

The overall design of the kit’s external envelope, including the air tightness of the relevant building details, has been assessed to provide adequate moisture control for the intended use, taking into account the geographical restrictions specified in cl. 1.2.

2.3.2 Watertightness The exterior wall design has been assessed on the basis of experience and general textbook recommendations to have adequate watertightness against driving rain for all specified areas of intended use.

Watertight internal surfaces in bathrooms etc. are not part of the kit.

2.3.3 Release of regulated substances The particleboards in the kits satisfy formaldehyde class E1 in EN 13986. Otherwise materials and components in the kit does not contain any regulated substances specified in the EU database.

2.4 Safety in use (ER 4) 2.4.1 Slipperiness of floor finishes Surface materials are not part of the kit. No performance determined.

2.4.2 Impact resistance Impact resistance of wall structures has been assessed on the basis of experience to be adequate for the intended use of the kit. No impact resistance based on impact tests have been determined.

2.5 Protection against noise (ER 5) 2.5.1 Airborne sound insulation Estimated weighted apparent airborne sound reduction index for the standard separating double leaf walls between housing units as defined in ISO 140/ISO 717 is R'w ≥ 55 dB.

Estimated weighted apparent airborne sound reduction index of the standard separating floor construction between housing units as defined in ISO 140/ISO 717 is R'w ≥ 52 dB.

Estimated weighted apparent airborne traffic sound reduction for the standard external walls as defined in ISO 140/ISO 717 is R'tr,s,w ≥ 37 dB.

2.5.2 Impact sound insulation Estimated weighted normalized impact sound pressure level of the standard separating floor construction between housing units as defined in ISO 140/ISO 717 is L'n,w ≤ 58 dB.

2.5.3 Sound absorption Surface materials are not part of the kit. No performance determined.

2.5.4 Methods of verification The sound insulation performances are based on tabulated values published by Norwegian Building Research Institute on the basis of in field type testing. European Technical Approval No. 04/0059 Page 8 of 18

2.6 Energy economy and heat retention (ER 6) 2.6.1 Thermal resistance Design thermal resistance and transmittance values for the kit’s external envelope, calculated according to EN ISO 6946 are: Total thermal Total thermal resistance Thermal transmittance

Structure insulation thickness* RT U mm (m²K)/W W/(m²K) External walls 150 3.4 0.29 Suspended ground floors 200 4.5 0.22 Roof with cold attic 300 7.7 0.13 Roof with insulated attic: Attic roof 250 5.5 0.18 Attic walls 200 4.5 0.22 * Design thermal conductivity for the thermal insulation made of mineral wool is 0.037 W/(mK).

2.6.2 Air permeability The standard building details of the kit design shown in Annex B is based on generally recommended construction details with continously clamped joints between stiff layers in the external envelope, and have been assessed to have adequate air tightness for the specified intended use. A building based on a properly installed kit should provide an overall air leakage ≤ 4.0 air changes per hour, tested at 50 Pa static pressure difference according to ISO 9972.

2.6.3 Thermal inertia No performance determined

2.7 Aspects of durability The timber species is in natural durability class 4 concerning fungus attack and class S concerning insect attack according to EN 350-2. Structural components are in hazard class 1 according to EN 335-1. Timber cladding is in hazard class 2 according to EN 335-1.

Mechanical fasteners applied indoors have zinc coating according to service condition 1 in EN 12329. Fasteners for timber cladding and for other exterior use have hot dip zinc coating according to EN ISO 1461 or equivalent corrosion protection.

The minimum assumed working life of the various parts of the system, based on general knowledge of timber frame performance related to the intended use specified in cl. 1.2, are as follows4: Structural frames and thermal insulation: 50 years Cladding: 50 years Sheathing materials and internal linings: 50 years Air- and moisture control layers: 50 years The assumed working life periods require regular maintenance as indicated in clause 4.5 and as specified by the manufacturer.

2.8 Aspects of serviceability Suspended floors with spans according to Annex A3 satisfy the criteria for stiffness of residential floors given in EN 1995-1-1 equation 7.3 for serviceability limit state, with limiting values a < 0.9 mm/kN for floors with high stiffness, and a < 1.3 mm/kN for floors with minimum stiffness.

4 The indications given on the working life cannot be interpreted as a garantee given by the producer, but are to be regarded only as a means for choosing the right products in relation to the expected economicallly reasonable working life of the works. European Technical Approval No. 04/0059 Page 9 of 18

3 Evaluation of Conformity and CE marking

3.1 Attestation of Conformity System

The attestation of conformity applied to this product, specified by the European Commission in Decision 99/455/EC, is System 1 according to Council Directive 89/106/EEC Annex III.2(i).

3.2 Responsiblities 3.2.1 Tasks of the manufacturer 3.2.1.1 Factory production control The manufacturer shall exercise permanent factory production control according to a factory production control plan endorsed by the notified inspection body. The production control plan shall be clearly documented in a quality manual, comply with the recommendations in clause 8.2.1.1 of ETAG 007, and include checking of incoming materials and components, process control of assemblies, and checking of final products to ensure conformity with the specifications in this approval.

3.2.1.2 Testing of samples taken at the factory No testing of samples according to a prescribed test plan is needed apart from a continous visual checking and checking of component dimensions.

3.21.3 Declaration of conformity When all the criteria of the Conformity Attestation are satisfied the manufacturer shall make a Declaration of Conformity to this ETA.

3.2.2 Tasks of notified bodies 3.2.2.1 Initial assessment of the product Initial assessment of Hedalm Aneby timber frame building kits has been carried out by the approval body and will serve as the initial product assessment for the notified body.

3.2.2.2 Initial inspection of factory and of factory production control The notified body shall assess the manufacturer’s factory production control plan in full, and approve the control plan that is documented in the quality manual. The notified body shall also ensure that the manufacturer has the necessary competent staff, premises and production equipment to produce the timber frame kits as described in the ETA.

3.2.2.3 Continous surveillance The notified body shall normally visit the factory twice a year for routine inspections, and primarily check that the production is in conformity with the factory production control plan.

The notified body shall in particular check that the manufacturer only use materials and components which are specified in Annex A2 of this ETA, and that all the specified case by case structural designs have been made and filed for each kit that is produced and delivered.

During the factory visits the notified body shall also make audit visual inspections of prefabri- cated elements, components and materials made ready for shipment to the building site, and check that the kits and assembly instructions are in conformity with the construction details in Annex B.

3.2.2.4 Certification When all criterias for conformity attestation are fulfilled the notified body shall issue a Certification of Conformity with this ETA.

When the provisions of this ETA is no longer satisfied the Certification of Conformity shall be withdrawn. European Technical Approval No. 04/0059 Page 10 of 18

3.3 CE marking The CE marking shall be affixed on each package of delivery. The CE symbol shall be in accordance with Directive 93/68/EEC. and accompanied by the following information:

- identification number of the notified certification body - name or identification mark of producer and his registered address - the last two digits of the year in which the CE marking was affixed - the number of the EC certificate of conformity - the number of the European Technical Approval - identification of the specific kit, including project identification

4 Assumptions under which the fitness of the product for the intended use was favourably assessed

4.1 Design The production of components for the building kits shall only be done on the basis of a designwork made for each individual house where the kits are part of the works.. The designwork shall be based on the relevant local building regulations for the works, and normally take into account the following: • Requirements for structural design • Fire safety requirements • Special local requirements related to health and the environment • Noise protection requirements • Energy saving requirements

4.2 Manufacturing The factory production of wall elements, the precutting of materials, the temporary storage of materials and components, and the packaging for transport units are done indoors in dry and heated premises. The moisture content in solid wood materials shall be below 18 % on average, and never exceed 20 %.

4.3 Foundations The vertical tolerance of the foundation tops, on which the kits are installed, shall be within ± 5 mm. A damp proof course shall be installed between the foundations and the wood based components according to the standard construction details for kit.

4.4 Installation The kits are installed according to the relevant descriptions in Annex B, plus a special installation manual worked out by the manufacturer for each indivudual kit. The installation manual shall cover all installation aspects for the kits, including: • erection systems and equipment • temporary bracing • permanent anchoring to foundations • weather protection during installation • materials and components which are necessary supplements to the kit • standard assembly joints and special joint designs for individual kits European Technical Approval No. 04/0059 Page 11 of 18

5 Recomendations

5.1 Packaging, transport and storage All components shall be fully protected from the weather during transportation. The first transport unit shall normally contain sufficient components and materials in order to close the house and protect the interior from rain penetration as soon as possible.

5.2 Maintenance The exterior walls, the roof, and integrated components like windows, external doors, gutters etc. shall be regularly inspected and maintained in accordance with the users guide for Hedalm Anebyhus timber frame building kits, and which follows every delivered house.

On behalf of Norwegian Building Research Institute Oslo, 21.09.2004

Trond Ramstad Head of Product Assessment

European Technical Approval No. 04/0059 Page 12 of 18

Annex A1

DESIGN OF HEDALM ANEBYHUS TIMBER FRAME BUILDING KITS Note: Detailed material and component specifications are given in Annex A2.

1 External walls The principle designs are shown in Fig. 1.1 and 1.2. The external walls are manufactured as prefabricated elements with 1200 mm standard width. Wall heights varies from 2.2 m to 2.7 m. Timber cladding are part of the elements delivered from the factory, while the vapour control layer and internal lining are installed on site after the erection of the elements. Windows are installed in the wall elements at the factory. They are not part of the kit, and are specified and marked separately.

Vertical timber boards are the main alternative as external cladding. Horisontal timber boards or external rendering on cementbonded wood/wool panels are optional claddings. Timber board cladding may be delivered with a factory applied stain as a base for the surface finish.

1 Internal lining 2 Water vapour barrier 3 150 mm mineral wool insulation 4 Fibreboard sheathing 5 Ventilated and drained air space 6 Timber battens 7 Timber cladding 8 Timber studs c/c 600 mm 9 Breather membrane see Fig. 1.2 10 Cementbonded wood/wool 11 Rendering

Fig. 1.1 Vertical and horizontal sections of external wall design. Vertical timber is standard cladding. Rendering on cementbonded wood/wool panels as shown, or brick veneer cladding, may also be applied, but is not a part of the kit.

1 30 mm x 148 mm timber 2 36 mm x 148 mm timber 3 48 mm x 148 mm timber 4 Two 48 mm x 148 mm timber

Fig. 1.2 Structural system of external walls. Beams and sidestuds for openings wider than 1200 mm are specially designed from case to case. European Technical Approval No. 04/0059 Page 13 of 18

2 Internal walls The principle design of load bearing and non-load bearing internal walls inside a housing unit is shown in Fig. 2. The walls are assembled on site with pre-cut timber studs. The voids in the timber frame may be fully filled with mineral wool insulation on request.

1 Internal lining 2 Timber studs and sills 3 Two 48 mm x 98 mm timber beams 36 mm x 68 mm in non-load bearing walls 36 mm x 98 mm in load bearing walls

Fig. 2 Internal wall design. Beams and sidestuds for openings wider than 1000 mm are specially designed from case to case.

3 Separating walls The principle design of separating walls between housing units in terraced housing etc. is shown in Fig. 3. The walls are non-load bearing, and assembled on site with pre-cut timber studs.

1 Particlepboard lining 2 Gypsum plasterboard 3 100 mm mineral wool insulation 4 Min. 78 mm air gap 5 48 mm x 98 mm studs C18 c/c 600 mm

Fig. 3 Separating wall design, based on two separated timber frame wall structures. European Technical Approval No. 04/0059 Page 14 of 18

4 Suspended floors The principle design of suspended floor structures are shown in Fig. 4.1, 4.2 and 4.3. The floors are assembled on site with pre-cut joists. Joist sizes are selected according to the span tables in Annex A3.

1 Timber joists c/c 600 mm 2 22 mm particleboard 3 100 mm mineral wool insulation 4 Internal lining 5 30 mm x 48 mm battens c/c 600 mm

Fig. 4.1 Design of floors between rooms inside the same housing unit.

1 198 mm timber joists c/c 600 mm 2 22 mm particleboard 3 200 mm mineral wool insulation 4 Fibreboard sheathing 5 13 mm x 38 mm timber batten 6 23 mm x 98 mm treated timber board

Fig. 4.2 Design of suspended ground floor.

1 22 mm particleboard 2 13 mm gypsum plasterboard 3 20 mm high density mineral wool 4 22 mm particleboard with slots 5 150 mm mineral wool insulation 6 30 mm x 48 mm battens c/c 600 mm 7 Rockwool ceiling brackets 8 36 mm x 48 mm battens c/c 600 mm 9 Timber joists c/c 600 mm spaced c/c 1200 mm 10 13 mm gypsum plasterboard 11 Internal lining

Fig. 4.3 Principle design of separating floors between housing units. European Technical Approval No. 04/0059 Page 15 of 18

5 Roofs The principle designs are shown in Fig. 5.1 and 5.2. The roofs are assembled on site, and the load bearing structure is prefabricated trussed rafters spanning across the width of the house. The structural design of the rafters are made from case to case. The roofs may have all types of roofing material, including roofing underlay or sheathing. This is also determined from case to case and is not part of the kit.

1 300 mm minral wool insulation 2 Water vapour barrier 3 30 mm x 48 mm battens c/c 600 mm 4 Internal lining 5 Trussed rafter bottom chord

Fig. 5.1 Principle design of roof structures with cold attic.

1 Sarking or sheathing with membrane 2 50 mm ventilated air space 3 Breather paper 4 250 mm mineral wool insulation in 5 48 mm x 48 mm battens fixed to 6 Water vapour barrier two layers the rafters in the factory 7 30 mm x 48 mm battens c/c 600 mm 8 Internal lining 9 50 mm mineral wool insulation 10 150 mm mineral wool insulation 11 Fibreboard sheathing

Fig. 5.2 Principle design of roof structures with thermally insulated rooms in the attic. European Technical Approval No. 04/0059 Page 16 of 18

Annex A2

MATERIAL AND COMPONENT SPECIFICATIONS FOR HEDALM ANEBYHUS TIMBER FRAME BUILDING KITS Component/ Specification Reaction to fire material (Component or material dimensions not mentioned here shall be as described in the class (See drawings in supporting document Annex B “Hedalm Anebyhus Timber Frame Building Kits. according to Annex A1) Construction details. Supplement to ETA no. 04/0059 ") EN 13501-1 Structural

components Timber studs in Untreated structural grade timber class C18 according to EN 338 or EN 519. D-s2, d0 walls Standard sizes are given in Annex A1 Beams over wall Untreated structural grade timber class C18 according to EN 338 or EN 519. -- “ -- openings Standard sizes are given in Annex A1 Timber joists in Untreated structural grade timber class C18 according to EN 338 or EN 519, -- “ -- floors or higher grade if required according to the span tables in Annex A3 Untreated prefabricated roof trusses manufactured and certified according to Roof trusses -- “ -- EN 1059/prEN 14250 22 mm t&g particleboards with minimum technical class P5 and formaldehyde class E1 according to EN 13986. Boards with slots shall be “Orkla Slissegulv” from Forestia AS, Norway, with the same material Floor sheathing -- “ -- specifications. T&g joints shall be glued, and the boards shall be fixed to the floor joists with 50 mm long particleboard screws spaced maximum 150 mm along the board edges and 300 mm at intermediate supports Non-structural

timber Sills and other Untreated structural grade timber class C18 according to EN 338 or EN 519 -- “ -- members Treated timber Pressure impregnated class AB according to NTR Dok. No. 1 by Nordic -- “ -- boards Wood Preservation Council Insulation

materials Thermal insulation Mineral wool according to EN 13162, with declared thermal conductivity between studs, A1 ≤ 0,037 W/(mK) and density > 15 kg/m3 joists and trusses High density 20 mm rockwool or glasswool boards type “Trinnlydplate” from Glava A/S, mineral wool in A1 Norway or A/S Rockwool, Norway separating floors Membranes/

barriers Water vapour 0,15 mm polyethylene film according to Norwegian industrial norm NPF 8000 F control layers or Swedish industrial norm SPF 2001 Breather paper Breather type membrane with air permeability ≤ 0,05 m³/m²hPa measured outside thermal according to EN 12114, and water vapour restistance ≤ 2.5·10 9 m²sPa/kg F insulation (sd ≤ 0.5 m) measured according to EN 12572 Sheathing etc. Fibreboard 12 mm “Asfalt Vindtett” bitumen impregnated softboards with airtight layer sheathing in E, pass from Hunton Fiber AS, Norway, according to NBI Technical Approval 2002 exterior walls Wood/wool boards 35 mm thick cementbonded wood/wool panels according to DIN 1101, as underlay for F 600 mm x 2400 mm format rendered facades Gypsum boards in 13 mm standard gypsum board type A according to prEN 520:2000 A2 separating floors Cladding Min. 19 mm solid timber boards according to Norwegian Standard 3186. Timber cladding D-s2, d0 Bottom boards in vertical board on board cladding may be 16 mm Continued European Technical Approval No. 04/0059 Page 17 of 18

Annex A2 (cont.)

Internal lining 12 mm particleboards technical class P4 and formaldehyde class E1 according to EN 13986 and density > 600 kg/m3. The boards shall be fixed Particleboards D-s2, d0 with particleboard screws spaced maximum 150 mm along the board edges, and 200 mm at intermediate supports. 13 mm standard gypsum board type A according to prEN 520:2000. The Gypsum boards boards shall be fixed with gypsum board screws spaced maximum 150 mm B-s1, d0 along the board edges, and 200 mm at intermediate supports. Fastening

components The type and positions of nails and screws shall be in accordance with the recommendations in the relevant Building Research Design Sheets issued by Norwegian Building Research Institute. Nails and screws A1 Corrosion protectection shall be equivalent to zinc coating according to service condition 1 in EN 12329 for indoors applications, and hot dip zinc coating according to EN ISO 1461 for exterior applications. Ceiling brackets in “Rockwool Lydbøyle B” from A/S Rockwool, Norway, or “Glava A1 separating floors Lydreduksjonsbøyle B” from Glava A/S, Norway Glue in floor PVA glue recommended by the glue manufacturer for sheathing installation F sheathing Other Coated aluminium for window sill flashings, otherwise Plastisol-covered Flashings F galvanised steel Sealing foam Bostik 4005 polyurethan foam or equivalent F Joint strip Strips of mineral wool A1 Damp proof course of polyethylene with EPDM airtight gaskets, or reinforced Compression strip F bitumen based dpc with adhesive properties European Technical Approval No. 04/0059 Page 18 of 18

Annex A3 Hedalm Anebyhus Timber Frame Building Kits

Span tables for floor joists of solid timber *

Table A Floors with high stiffness Maximum self weight*: 0,8 kN/m² Maximum imposed load: 3,0 kN/m²

Joist Net joist span, depending on timber grade and joist spacing size Grade C 18 Grade C 24 Grade C 30 mm x mm Spacing c/c in mm Spacing c/c in mm Spacing c/c in mm 300 400 600 300 400 600 300 400 600 36 x 148 2,10 1,95 1,90 2,25 2,15 2,05 2,35 2,20 2,10 42 x 148 2,20 2,10 2,00 2,35 2,25 2,15 2,45 2,35 2,20 48 x 148 2,30 2,15 2,05 2,50 2,35 2,25 2,60 2,45 2,30 36 x 198 2,90 2,75 2,60 3,10 2,95 2,80 3,25 3,05 2,90 42 x 198 3,05 2,85 2,70 3,30 3,10 2,95 3,40 3,20 3,05 48 x 198 3,15 3,00 2,85 3,45 3,25 3,05 3,55 3,35 3,20 61 x 198 3,45 3,25 3,05 3,75 3,50 3,30 3,85 3,65 3,45 73 x 198 3,65 3,45 3,25 3,95 3,75 3,50 4,10 3,90 3,65 36 x 223 3,30 3,10 2,95 3,55 3,35 3,20 3,70 3,50 3,30 48 x 223 3,65 3,45 3,25 3,95 3,70 3,50 4,10 3,85 3,60 73 x 223 4,20 3,95 3,70 4,55 4,25 4,00 4,70 4,45 4,15 * If the self weight is increased to 2,6 kN/m² (f.ex. with a 50 mm concrete slab on top), the maximum imposed load is limited to 2,0 kN/m²

Table B Floors with minimum stiffness Maximum self weight: 0,8 kN/m² Maximum imposed load: 2,0 kN/m²

Joist Net joist span, depending on timber grade and joist spacing size Grade C 18 Grade C 24 Grade C 30 mm x mm Spacing c/c in mm Spacing c/c in mm Spacing c/c in mm 300 400 600 300 400 600 300 400 600 36 x 148 2,45 2,30 2,15 2,65 2,50 2,30 2,75 2,60 2,40 42 x 148 2,60 2,45 2,25 2,80 2,65 2,45 2,90 2,75 2,50 48 x 148 2,70 2,55 2,35 2,90 2,75 2,55 3,00 2,85 2,65 36 x 198 3,40 3,20 2,95 3,65 3,45 3,20 3,80 3,60 3,30 42 x 198 3,55 3,35 3,10 3,85 3,65 3,35 4,00 3,75 3,50 48 x 198 3,75 3,50 3,25 4,00 3,80 3,50 4,15 3,95 3,65 61 x 198 4,05 3,80 3,50 4,35 4,10 3,80 4,50 4,25 3,95 73 x 198 4,25 4,05 3,70 4,60 4,35 4,00 4,80 4,50 4,15 36 x 223 3,90 3,65 3,40 4,20 3,95 3,65 4,35 4,10 3,80 48 x 223 4,25 4,00 3,70 4,60 4,35 4,00 4,75 4,50 4,15 73 x 223 4,85 4,60 4,25 5,25 4,95 4,60 5,45 5,15 4,75

* All spans given in the tables are determined by the stiffness requirement to avoid excessive vibration at serviceability limit state. In addition the spans have been checked to satisfy the strength requirements at ultimate limit state, using the following partial load factors: γG = 1.20 for permanent actions (self weight) γG = 1.50 for imposed, variable actions