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BS ISO 16696-1:2019

$167.15

Timber structures. Cross laminated timber – Component performance, production requirements and certification scheme

Published By Publication Date Number of Pages
BSI 2019 34
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This document establishes the basic principles for component performance and minimum production requirements for cross laminated timber (CLT). This document also contains scheme requirements for conformance, as provided in Annex D.

The document is applicable to CLT products which are manufactured from solid-sawn timber or wood based panels built up of at least three layers in which the grain of adjoining layers are at right angles to each other.

This document provides CLT dimension tolerances; component requirements; performance criteria; production, testing and trade marking guidance; and minimum requirements for factory production control. This document is based on known species, species combination and/or wood based panel structural performance and bondability.

CLT qualified in accordance with the provisions of this document are intended to resist the effects of moisture on structural performance as can occur due to construction delays or other conditions of similar severity.

NOTE This document does not include how CLT is to be used and installed, as it will be detailed in ISO 16696‑2.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
14 4 Symbols and subscripts
4.1 Symbols
4.2 Subscripts
15 5 CLT panel dimensional tolerances
5.1 Dimensional tolerances at time of manufacture
5.1.1 General
5.1.2 Panel thickness
5.1.3 Layer thickness
5.1.4 Panel width
5.1.5 Panel length
5.1.6 Grooves and edge bonds
5.2 Squareness
16 5.3 Straightness
6 Component requirements
6.1 Solid sawn timber
6.1.1 Solid sawn timber species
6.1.2 Solid sawn timber sizes
6.1.3 Moisture content
6.1.4 Solid sawn timber face-bonding surface
17 6.1.5 Face-bonding dimensional tolerances
6.2 Wood based panels
6.2.1 General
6.2.2 Moisture content
6.2.3 Wood based panels face-bonding surface
6.2.4 Face-bonding dimensional tolerances
6.3 Adhesive requirements
6.3.1 General
6.3.2 Testing for minor changes of adhesive systems
6.3.3 Finger joints in laminations when used
18 6.3.4 Edge joints in laminations when used
6.3.5 Glue line integrity for glue lines between layers (face joints)
6.3.6 Shear strength of edge bonds in solid sawn timber layers
6.4 Large finger joints of panels
6.4.1 General
6.4.2 Bending strength
7 Cross laminated timber performance criteria
7.1 Layup requirements
19 7.2 Mechanical resistance of cross laminated timber products
7.3 Durability against biological attack
7.3.1 General
7.3.2 Solid sawn timber layers without preservative treatment
7.3.3 Solid sawn timber layers with preservative treatment
7.3.4 CLT treated with preservative treatment
20 7.4 Formaldehyde emission
7.5 Dimensional stability
7.5.1 General
7.5.2 Maximum deviations
7.5.3 Corrected sizes and moisture deformation factor
7.6 Appearance classification
21 8 Production, testing, and trade marking
24 Annex A (normative) Panel layup (construction)
25 Annex B (normative) Examples of CLT appearance classification
26 Annex C (normative) Ply grading
27 Annex D (normative) Production assessment, trade marking and factory production control
32 Annex E (informative) Supplementary properties
33 Bibliography
BS ISO 16696-1:2019
$167.15