European Technical Approval ETA-12/0079 · MEMBER OF EOTA European Technical Approval ETA-12/0079 ... Page 2 / 17 of ETA-12/0079, issued on 23.11.2012, valid to 27.03.2017 English

Evropská organizace pro technické schvalování European Organisation for Technical Approval

Technický a zkušební ústav stavební Praha, s.p. Prosecká 811/76a CZ-190 00 Praha 9 - Prosek Czech Republic Tel.: +420 286 019 458 Internet: www.tzus.cz

MEMBER OF EOTA

European Technical Approval ETA-12/0079 (English translation prepared by TZÚS - Original version in Czech language)

Obchodní název Trade name

NOVATOP solid NOVATOP solid

Držitel schválení Holder of approval

AGROP NOVA a.s. Ptenský Dvorek 99 CZ-798 43 Ptení Czech Republic

Typ a použití výrobku Generic type and use of construction product

Tuhé dřevěné panely určené pro konstrukční použití v budovách Solid wood slab element to be used as a structural element in buildings

Platnost od do Validity from to

23.11.2012 27.03.2017

Výrobna Manufacturing plant

AGROP NOVA a.s. Ptenský Dvorek 99 CZ-798 43 Ptení Czech Republic

Toto Evropské technické schválení obsahuje This European Technical Approval contents

Toto Evropské technické schválení nahrazuje This European Technical Approval replaces

17 stran včetně 6 příloh 17 pages including 6 Annexes ETA-12/0079 platné od 28.03.2012 do 27.03.2017 ETA-12/0079 valid from 28.03.2012 to 27.03.2017

Page 2 / 17 of ETA-12/0079, issued on 23.11.2012, valid to 27.03.2017 English translation by TZUS Prague – Branch Ostrava

I. LEGAL BASES AND GENERAL CONDITIONS

1 This European Technical Approval is issued by Technický a zkušební ústav stavební Praha, s.p. (TZUS Praha) in accordance with:

- Council Directive 89/106/EEC of 21 December 1988 on the approximation of laws, regulations and administrative provisions of Member States relating to construction products1, modified by Council Directive 93/68/EEC of 22 July 19932 and Regulation (EC) No. 1882/2003 of the European Parliament and of the Council3;

- the Governmental Decree No. 190/2002 of the Collection of Law4;

- Common Procedural Rules for Requesting, Preparing and the Granting of European Technical Approvals set out in the Annex of Commission Decision 94/23/EC5;

2 The Technický a zkušební ústav stavební Praha, s.p. is authorized 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 the intended use remains with the holder of the European Technical Approval.

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

4 This European Technical Approval may be withdrawn by Technický a zkušební ústav stavební Praha, s.p., in particular after information by the Commission on the basis of Article 5 (1) of 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 Technický a zkušební ústav stavební Praha, s.p. 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 The European Technical Approval is issued by the approval body in its official language. This version corresponds to the version circulated within EOTA. Translations into other languages have to be designated as such.

1 Official Journal of the European Communities No L 40, 11.02.1989, p. 12 2 Official Journal of the European Communities No L 220, 30.08.1993, p. 1 3 Official Journal of the European Union No L 284, 31.10.2003, p. 1 4 Governmental Decree No. 190/2002 of the Collection of Law of the Czech Republic, 10.04.2002

5 Official Journal of the European Communities No L 17, 20.01.1994, p. 34


II. SPECIFIC CONDITIONS OF THE EUROPEAN TECHNICAL APPROVAL

1 Definition of product and intended use

1.1 Definition of the construction product

NOVATOP solid are cross laminated timber elements (called “NOVATOP solid” in the further text) made of softwood boards which are bonded together to form solid wood slab elements with a minimum of three layers up to a maximum of 13 layers. Adjacent layers are generally arranged with the grain direction perpendicular (angle 90°) to each other. In NOVATOP cross laminated timber elements with at least five layers, up to two adjacent layers may be oriented with parallel grain direction. The lay-up of the solid wood slab shall be symetrical about its center plane.

Thickness of NOVATOP solid is up to 0.4 m, width is up tp 2.5 m and length is up to 6.0 m in case of continuous longitudinal layers or up to 12.0 m in case of layers connected by finger joints.

The principle of structure of the solid wood slab is shown in Annex 1.

The species used is European spruce or an equivalent softwood.

The application of chemical substances (wood preservatives and flame retardants) is not subject of this European Technical Approval.

1.2 Intended use

NOVATOP solid are intended to be used as structural or non-structural elements in buildings and timber structures, e.g. as walls, floors and roofs. NOVATOP solid may only be used in service classes 1 and 2 according to EN 1995-1-1+A16. Members which are directly exposed to the weather shall be provided with an effective protection for the solid wood slab element in service.

The solid wood slab shall be subjected to static and quasi static actions only.

The provisions made in this ETA are based on an assumed intended working life of the elements of 50 years. The indications given on the working life cannot be interpreted as a guarantee given by the producer or by the Approval Body, but are to be regarded only as a means for choosing the right products in relation to the expected economically reasonable working life of the works.

2 Characteristics of the product and methods of ve rification

The evaluation of the fitness for use of the elements for the intended use was performed in conformity with the CUAP 03.04/06, version June 2005.

2.1 Mechanical resistance and stability (ER 1)

The mechanical properties of the NOVATOP solid and the boards for its manufacturing correspond to the specifications given in the Annexes 2 and 3. Details about the elements are deposited at TZUS Praha.

Specification of the boards is given in Annex 2. Boards are visually or machine strength graded. Only technically dried wood shall be used.

Only boards which are planned on both sides shall be used. The boards can be connected by finger joints according to EN 385 in longitudinal direction. Butt joints in longitudinal layers are not permissible.

6 Reference documents are listed in Annex 6.


Resistance and stiffness values shall be calculated according to EN 1995-1-1+A1, 9.1.2 “Glued thin-flanged beams”. In addition the joint design and embedding strength values given in EN 1995-1-1+A1 for solid timber shall be taken into account.

Resistance against seismic actions is NPD. Local design regulations shall be taken into account in areas where the elements might support seismic action.

Additional national provisions shall be taken into account.

Adhesive

The adhesive for gluing the solid wood slab and the finger joints of the individual boards shall conform to EN 301 and, if relevant, to ETAG 011, Annex C.

Normally, a melamine-urea formaldehyde or PU adhesive is used.

Dimensional stability

In normal condition, harmful deformations due to moisture changes of NOVATOP solid are not expected.

Tolerances of the NOVATOP solid are given in the specified moisture content of 10 % ± 2 %, see Table 1.

Table 1: Tolerances of NOVATOP solid wood slab

thickness, h ± 1 mm

length, l ± 2 mm

width, b ± 2 mm

2.2 Safety in case of fire (ER 2)

2.2.1 Reaction to fire

NOVATOP solid is classified to have reaction to fire D-s2, d0 (as walls, roofs, ceilings and special construction components) and Dfl-s1 (as floor construction components) without further testing (CWFT) in accordance with the Commission Decision 2003/43/EC. The boundry conditions stated in the Commission Decision have to be met.

2.2.2 Resistance to fire

No performance determined.

2.3 Hygiene, health and environment (ER 3)

2.3.1 Release of dangerous substances

Based on the declaration of the manufacturer, NOVATOP solid does not contain harmful or dangerous substances as defined in the EU database, with exception of formaldehyde. The formaldehyde release of the boards is classified to be E1 in accordance with EN 13986.

In addition to the specific clauses relating to dangerous substances contained in this European Technical Approval, there may be other requirements applicable to the products falling within its scope (e.g. transposed European legislation and national laws, regulations and administrative provisions). In order to meet the provisions of the EU Construction Products Directive, these requirements need also to be complied with, when and where they apply.

2.3.2 Vapor permeability



If requirements concerning the water vapor permeability of the elements are made, the calculation shall be performed in accordance with EN ISO 13788 using the design vapor permeability of the softwood from EN ISO 10456.

2.3.3 Application of biocides

Biocides for wood preservation are not used.

2.4 Safety in use (ER 4)

2.4.1 Slipperiness

Not relevant. The elements do not have finished floor covering. Possible floor covering shall fulfill the requirements for slipperiness performance.

2.5 Protection against noise (ER 5)

2.5.1 Airborne sound insulation


If requirements concerning the airborne sound insulation of the elements are made, the calculation shall be performed in accordance with EN 12354-1 and EN 12354-3.

2.5.2 Impact sound insulation


If requirements concerning the impact sound insulation of the elements are made, the calculation shall be performed in accordance with EN 12354-2.

2.5.3 Sound absorption


2.6 Energy economy and heat retention (ER 6)

2.6.1 Thermal resistance


Based on individual design of NOVATOP solid might have energy economy related function. The thermal resistance R (R-value) or thermal transmittance U (U-value) of the product varies according to the design.

Thermal resistance of the elements shall be calculated e.g. according to EN ISO 6946 using the design thermal conductivity of the softwood from EN ISO 10456.

2.6.2 Air tightness


2.6.3 Thermal inertia


2.7 Aspects of durability, serviceability and iden tification

2.7.1 Durability

NOVATOP solid can be used in service classes 1 and 2 as definied in Eurocode 5 (EN 1995-1-1+A1). This classes correspond to the hazard classes 1 and 2 according to EN 335-1. The elements shall not be used in service class 3 / hazard class 3 without additional protective treatment.

Notice: Attack from insects may have severe detrimental effects to the performance of the elements. Standards, regulations and recommendations in force at the place of use should be observed.


If the elements are intended to be covered by timber flooring, it is recommended that the moisture content is checked by a moisture meter calibrated for each type of used wood.

When necessary and required by the local authorities at the building site, the elements may be treated against biological attack according to the rules valid in the place of use. Any adverse effects of the treatment on other properties shall be taken into account. These kinds of treatments are not covered by this ETA.

2.7.2 Serviceability

Serviceability of the elements is understood as their ability to resist loads without unacceptable deformations and vibrations. This characteristic is treated under ER 1.

2.7.3 Identification

Each delivery package is labeled with relevant data, e.g. mark of elements, address and other customer data. The product label also bears the CE marking.

2.7.4 Bond integrity

Structural glue according to EN 301 is used.

3 Evaluation and attestation of conformity and CE marking

3.1 System of attestation of conformity

According to the Decision 97/176/EC of the European Commission7 the system 1 of the attestation of conformity applies.

This system of attestation of conformity is definied as follows:

System 1: Certification of the conformity of the product by an approved certification body on the basis of:

a) Tasks for the manufacturer: (1) factory production control (FPC); (2) further testing of samples taken at the factory by the manufacturer in

accordance with a prescribed test plan.

b) Tasks for the notified body: (3) inititial type testing (ITT); (4) initial inspection of factory and of factory production control; (5) continuous surveillance, assessment and approval of factory production

control.

3.2 Responsibilities

3.2.1 Tasks for the manufacturer

3.2.1.1 Factory production control

At the manufacturing plant the manufacturer has implemented and continuously maintains a factory prduction control. All the elements, requirements and provisions adopted by the manufacturer are documented in a systematic manner in the form of written policies and procedures. The factory production control ensures that the product is in conformity with the European Technical Approval.

The manufacturer shall only use raw materials supplied with the relevant inspection documents as laid down in the prescribed Control plan8. The incoming raw materials shall be subject to controls and tests by the manufacturer before acceptance.

7 Official Journal of the European Communities No L 73/19 from 03/1997 8 The prescribed control plan is a confidential part of the European Technical Approval and only handed over to

the approved body or bodies involved in the procedure of attestation of conformity. See section 3.2.2.


Checking of incoming materials shall include control and inspection documents (comparison with nominal values) presented by the manufacturer of the raw materials by verifying the dimensions and determining the material properties.

The frequencies of controls and tests conducted during manufacturing and on the assembled solid wood slab are definied by taking account of the manufacturing process of the solid wood slab and are laid down in the prescribed Control plan.

The test results of factory production control shall be recorded and evaluated in accordance with the provisions of the Control plan. The records include at least: - Designation of the product, basic materials and components; - Type of control or testing; - Date of manufacture of the product and date of testing of the product or basic materials or components; - Results of control testing and, if appropriate, comparison with requirements; - Name and signature of person responsible for factory production control.

The records shall be kept at least for five years time and shall be presented to the approved body (notified body) involved in continuous surveillance. On request they shall be presented to the approval body.

3.2.1.2 Other tasks for the manufacturer

The manufacturer shall, on the basis of a contract, involve a body (bodies) which is (are) approved for the tasks referred to in section 3.1 in the fild of the elements in order to undertake the actions laid down in section 3.3. For this purpose, the Control plan referred to in section 3.2.1.1 and 3.2.2 shall be handed over by the manufacturer to the approved body or bodies involved.

The manufacturer shall make a declaration of conformity, stating that the construction product is in conformity with the provisions of this European Technical Approval.

3.2.2 Tasks for the notified body

3.2.2.1 Initial type testing of the product

For initial type-testing, the results of the tests performed as part of the assessment for the European Technical Approval may be used unless there are changes in the manufacturing process or manufacturing plant. Otherwise, the necessary initial type-testing shall be agreed between the approval body and the notified body involved.

3.2.2.2 Initial inspection of factory and of factory production control

The notified body shall ascertain that, in accordance with the prescribed Control plan, the factory, in particular personnel and equipment, and the factory production control are suitable to ensure a continuous and orderly manufacturing of the solid wood slab according to the specifications mentioned in section II as well as in the Annexes of the European Technical Approval.

The notified body involved by the manufacturer shall issue an EC certificate of conformity of the product stating the conformity with the provisions of this European Technical Approval.

3.2.2.3 Continuous surveillance

The notified body shall visit the factory at least once a year for surveillance. It shall be verified that the factory production control and the specified manufacturing process are maintained, taking account of the prescribed Control plan. On demand the results of continuous surveillance shall be made available by the notified body to the approval body.


In cases where the provisions of the European Technical Approval and its Control plan are no longer fulfilled the notified body shall withdraw the certificate of conformity and inform TZUS Praha without delay.

The notified body shall retain the essential points of its actions referred to above and state the results obtained and conclusions drawn in a written report.

3.3 CE marking

The CE marking shall be affixed on a label attached to each element or on the accompanying commercial documents. The letters „CE“ shall be followed by the identification number of the notified body, where relevant, and be accompanied by the following additional information: - Identification number of the notified body; - Name or identifying mark and address of the producer; - The last two digits of the year in which the CE marking was affixed; - The number of the EC certificate of conformity for the product; - The number of the European Technical Approval; - Description of the element showing its intended use; - Species of the wood used; - Number and arrangement of the layers; - Nominal thickness of the element; - Strength class of the wood of each layer; - Type and classification of the adhesive.

4 Assumptions under which the fitness of the produ ct for the intended use was favorably assessed

4.1 Manufacturing

The solid wood slabs are manufactured in accordance with the provisions of the European Technical Approval using the manufacturing process as identified in the inspection of the manufacturing plant by the approval body and laid down in the technical documentations.

Layers of planed boards shall be bonded together to the required thickness of the solid wood slabs. The individual boards may be joined in longitudinal direction by means of finger joints according to EN 385, there shall be only butt joints in cross layers.

Adhesive shall be applied on one face of each board. The edges of the boards are not bonded.

The European Technical Approval for the solid wood slab is issued on the basis of agreed data, deposited with the approval body, which identifies the solid wood slab that has been assessed and judged. Changes of materials, of composition or characteristics, or to the manufacturing process, which could result in this deposited data being incorrect, should be immediately notified to the approval body before the changes are introduced. The approval body will decide whether or not such changes affect the European Technical Approval, and, if so, whether further assessment or alterations to the European Technical Approval are considered necessary.

4.2 Installation

NOVATOP solid must be installed by appropriately qualified professional personnel under the supervision of the person responsible for technical matters on site. An assembly plan shall be prepared for each structure, which contains the sequence in which the individual solid wood slab element shall be installed and the designation


of the solid wood slab elements. The assembly plan shall be available at the construction site.

The manufacturer shall prepare installation instructions in which the product-specific characteristics and the most important measures to be taken into consideration for installation are described. The installation instructions shall be available at every construction site and shall be deposited at TZUS Praha.

The safety-at-work and health protection regulations have to be observed.

4.3 Design

The European Technical Approval only applies to the manufacture and use of the solid wood slab. Verification of stability of the works including application of loads on the solid wood slab is not subjected of this European Technical Approval.

Fitness for the intended useof the solid wood slab is given under the following conditions: - Design of the solid wood slab elements is carried under the responsibility of an

engineer experienced in solid wood slab elements; - Design of the works shall account for the protection of the solid wood slab

elements; - The solid wood slab elements are installed correctly.

Design of the solid wood slab elements can be designed in accordance with EN 1995-1-1+A1 with reference to article 2.1 of this ETA. Standards and regulations effective at the place of use should be taken into account.

5 Indications to the manufacturer

5.1 General

It is the responsibility of the ETA holder to ensure that all necessary information on design and installation is submitted to those responsible for design and execution of the works constructed with the solid wood slab elements.

5.2 Packaging, transport and storage

The elements must be stored in closed and dry spaces and positioned horizontally; after the removal of the protective casing they must be carefully covered, preferably with a diff erent sheet material. The elements must be protected from adverse weather eff ects even on the construction site, and stored there for the necessary time only. It is necessary to avoid exposing the components to rain and fl owing water; for the protection against rain, impurities and excessive solar radiation it is recommended using waterproof tarpaulins or canvases.

The manufacturer’s instruction for packaging, transport and storage shall be observed.

5.3 Use, maintenance and repair

Before use, the elements must be checked, whether they were not damaged during transport or storage. Damaged elements must be replaced with new elements.

During the assembly, the elements may be exposed to the weather for a short period of time. Elements, which have become damp, must be dried and checked for damage before they are used and assembled. Only faultless elements may be used.

The manufacturer must assure that information about the relevant measures will be presented to the responsible persons.

The original document is signed by:

Ing. Jozef Pôbiš Head of the Approval Body


NOVATOP solid

The principle structure of the solid wood slab elem ents Annex 1

a) b) Figure 1: Principle structure of the solid wood slab elements

a) Cross laminated timber with three layers; b) Cross laminated timber with five layers

Figure 2: Principle structure of the cross laminated timber with six layers

a) b)

Figure 3: Principle structure of the cross laminated timber with three layers a) Cross laminated timber with finger joints; b) Cross laminated timber with continuous

longitudinal layers


NOVATOP solid

Characteristics of the solid wood slab Annex 2

Solid wood slab element

Thickness mm 14 to 400

Width mm ≤ 2500

Length mm ≤ 6000

Number of layers - 3 to 13

Boards

Surface - Planed and/or grinded

Gaps between adjacent boards - max. 6 mm

Thickness mm 4 to 44

Boards shall be strength graded with suitable visual and/or machine procedures to be able to assign them to the strength classes according to EN 338. Boards in cross layers containing butt joints have no tensile, compression or bending strength parallel to the grain.

-

Within one member of the cross laminated timber only one of the specified combinations of strength classes shall be applied: Cover layers: C 24 Inner layer: C 16 or C 24

Moisture of wood according to EN 13183-2 %

10 ± 2 Within one solid wood slab element only one of the specified moisture ranges shall be applied.

Finger-joints - EN 385


NOVATOP solid

Mechanical requirements Annex 3

Essential Requirement 1 (ER 1)

Requirement Verification method

Class / Use cathegory / Numeric value

Strength class of the boards EN 338 C 16 C 24

Mechanical actions perpendicular to the plane of cr oss laminated timber

Property - - in N/mm2

Bending strength fm,k CUAP 03.04/06 18.5 24.0

Tensile strength ft,90,k EN 1194 0.4 0.4

Compression strength fc,90,k EN 1194 2.2 2.7

Shear strength fR,v,k perpendicular to the grain of the boards CUAP 03.04/06 0.8 0.8

Shear strength fv,k parellel to the grain of the boards

EN 1194 2.1 2.7

Modulus of elasticity parallel to the grain of the boards E0,mean

CUAP 03.04/06 8400 11600

Modulus of elasticity perpendicular to the grain of the boards E90,mean

EN 1194 280 390

Shear modulus parallel to the grain of the boards Gmean

EN 1194 520 720

Shear modulus perpendicular to the grain of the boards GR,mean

N/mm2

CUAP 03.04/06 50 50

Mechanical actions in the plane of cross laminated timber

Bending strength fm,k CUAP 03.04/06 18.5 24.0

Tensile strength parallel to the grain of the boards ft,0,k

EN 1194 13.0 16.5

Compression strength fc,0,k EN 1194 21.0 24.0

Modulus of elasticity parallel to the grain of the boards E0,mean

CUAP 03.04/06 8400 11600

Shear strength parallel to the grain of the boards fv,k calculated with the gross cross section

CUAP 03.04/06 1.7 1.7

Shear modulus parallel to the grain of the boards Gmean

N/mm2

CUAP 03.04/06 520 720

Other mechanical actions

Creep and duration of load - EN 1995-1-1+A1

Dimensional stability - Moisture content during service shall not change to such an extend that adverse deformation will occur.


NOVATOP solid

Performance characteristics Annex 4

Performance characteristic Verification procedure

Class / Use category / Numeric value


Reaction to fire

Solid wood panels excluding floorings

D-s2, d0

Floorings of solid wood panels

Commission Decision

2003/43/EC Dfl-s1

Resistance to fire

Charring rate EN 13501-2+A1 No performance determined


Release of dangerous substances

Formaldehyde EN 13986 E1 (emission class)

Vapor permeability

Vapor permeability EN ISO 12572 No performance determined

Application of biocides

Biocides for wood preservation are not used


Slipperiness

Not relevant - -


Airborne sound insulation

Weighted sound reduction index Rw EN ISO 10140-2 No performance determined

Impact sound insulation

Weighted impact sound pressure level Ln,w EN ISO 10140-3 No performance determined

Sound absorption

Sound absorption EN ISO 354 No performance determined


Thermal resistance EN ISO 6946 (EN 12664)

Air tightness EN 12114

Thermal inertia -

No performance determined


NOVATOP solid

Recommendations for design Annex 5

General

Design, calculation and realization can be done according to EN 1995-1-1+A1 taking into account the following provisions. For the calculation according to EN 1995-1-1+A1 national regulations may have to be followed.

Layers covering the surface in addition to the symmetric structure may not be taken into account for the calculation.

The determination of the distribution of stresses and internal forces must consider the influence of shear deformations.

Characteristic strength and stiffness values can be taken from the Annex 3.

Mechanical actions perpendicular to the solid wood slab

1) Bending

Taking into account the slip within the cross layers due to rolling shear and a shear modulus of G = 50 N/mm2 might be used.

For NOVATOP solid with three layers (two longitudinal layers and one cross layer) fulfilling the conditions in EN 1995-1-1+A1, Annex B.1.2 the stress distribution might be calculated according to EN 1995-1-1+A1, Annex B, as mechanically jointed beams with the following assumption:

i

i

K

s=

bG

d

meanR

i

⋅,

(1)

where

di is thickness of the cross layer i, in mm; GR,mean - rolling shear modulus of cross layer, GR,mean = 50 N/mm2;

b - width of the cross layer, in mm.

For NOVATOP solid with five layers (three longitudinal layers and two cross layer) fulfilling the conditions in EN 1995-1-1+A1, Annex B.1.2 the stress distribution might be calculated according to EN 1995-1-1+A1, Annex B, as mechanically jointed beams with the following assumption:

1) Equation (1);

2) The longitudinal stiffness of the cross layers shall be disregarded.

3) For the determination of the distances ai the interspaces between the longitudinal layers shall be taken into account.

For the design of the solid wood slabs a bending strength of 24 N/mm2 (maximum stress in the outermost fiber) might be assumed. Additionally, the factor ksys according to EN 1995-1-1+A1 might be taken into account depending on the number of parallel boards in the outer layer. The resulting value for 8 and more boards in the outer layer corresponds to a characteristic bending strength value of 28.8 N/mm2. Consistently a modulus of elasticity of 11600 N/mm2 for the strength class GL24h according to EN 1194 might be assumed parallel to the grain of the layers.

2) Tension and compression

Load bearing capacity and stiffness compression might be calculated according to EN 1995-1-1+A1 using the strength class GL24h according to EN 1194. Tension perpendicular to the solid wood slab shall be avoided.


3) Shear

For the design of the solid wood slabs according to EN 1995-1-1+A1 or according to the shear analogy method a shear strength perpendicular to the grain of the boards (rolling shear strength) of 0.8 N/mm2 (maximum shear stress within the cross layers) might be assumed. A shear modulus parallel to the grain of the boards of 720 N/mm2 and perpendicular to the grain of the boards (rolling shear) of 50 N/mm2 might be assumed.

Mechanical action in plane of the solid wood slab

Stress distribution within the solid wood slab has to be calculated by taking into account only the boards which are oriented in the direction of the actions.

1) Bending For the design of the solid wood slabs according to EN 1995-1-1+A1 a bending strength of 24 N/mm2 (maximum stress in the outermost fiber) might be assumed. Additionally, the factor ksys according to EN 1995-1-1+A1 might be taken into account depending on the number of layers parallel to the span. Consistently a modulus of elasticity of 11600 N/mm2 might be assumed.

2) Tension and compression Load bearing capacity and stiffness for tension and compression can be calculated according to EN 1995-1-1+A1 using the strength class values according to EN 1194. The net cross section is calculated by only taking into account the layers with grain direction parallel to the force.

3) Shear For the design of the solid wood slabs according to EN 1995-1-1+A1 a shear strength of 1.70 N/mm2 (shear stress based on the gross cross section) and a shear modulus of 720 N/mm2 might be assumed.


NOVATOP solid

Reference documents Annex 6

CUAP (Common Understanding of Assessment Procedure) 03.04/06, version June 2005: Solid wood slab element to be used as a structural element in buildings

ETAG 011 Guideline for European Technical Approval of Light composite wood-based beams and columns, version January 2002

EN 1995-1-1+A1 Eurocode 5: Design of timber structures - Part 1-1: General - Common rules and rules for buildings

EN 13501-1+A1 Fire classification of construction products and building elements - Part 1: Classification using test data from reaction to fire tests

EN 14358 Timber structures - Calculation of characteristic 5-percentile values and acceptance criteria for a sample

EN 301 Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification and performance requirements

EN 323 Wood-based panels - Determination of density

EN 325 Wood-based panels - Determination of dimensions of test pieces

EN 338 Structural timber - Strength classes

EN 408 Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties

EN 789 Timber structures - Test methods - Determination of mechanical properties of wood based panels

EN 1194 Timber structures - Glued laminated timber - Strength classes and determination of characteristic values

EN 12354-1 Building acoustics - Estimation of acoustical performance of buildings from the performance of elements - Part 1: Airborne sound insulation between rooms

EN 12354-2 Building acoustics - Estimation of acoustical performance of buildings from the performance of elements - Part 2: Impact sound insulation between rooms

EN 12354-3 Building acoustics - Estimation of acoustic performance of buildings from the performance of elements - Part 3: Airborne sound insulation against outdoor sound

EN ISO 6946 Building components and building elements - Thermal resistance and thermal transmittance - Calculation method

EN ISO 10456 Building materials and products - Hygrothermal properties - Tabulated design values and procedures for determining declared and design thermal values (ISO 10456:2007)

Commission Decision 2003/43/EEC of 17 January 2003 establishing the classes of reaction-to-fire performance for certain construction products

Report No. 076147 regarding testing the Cross Laminated Timber from 26 March 2008, University of Karlsruhe, Germany

H.J. Blaß: Expert Report No. 563 from 29 June 2009, Karlsruhe, Germany

H.J. Blaß: Expert Report No. 982 from 2 August 2012, Karlsruhe, Germany

Report No. 2376/2010-RH regarding testing the Cross Laminated Timber from 29 June 2011, Holzforschung, Austria


Test Report No. B956/2008 from 17 March 2008 regarding the determination of formaldehyde release, Fraunhofer Institute for Wood Research Wilhelm-Klauditz-Institut WKI, Germany

Test Report No. B957/2008 from 17 March 2008 regarding the determination of formaldehyde release, Fraunhofer Institute for Wood Research Wilhelm-Klauditz-Institut WKI, Germany

Documents

European Technical Approval ETA-12/0079 · MEMBER OF EOTA European Technical Approval ETA-12/0079 ... Page 2 / 17 of ETA-12/0079, issued on 23.11.2012, valid to 27.03.2017 English