BS 6446:1997
Current
The latest, up-to-date edition.
Specification for manufacture of glued structural components of timber and wood based panels
Hardcopy , PDF
English
15-06-1997
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Committees responsible
Foreword
Introduction
Specification
1 Scope
2 Normative references
3 Definitions
4 Design parameters to be established prior to production
5 Materials
6 Joints
7 Preparation of timber and wood based panel products
8 Permissible deviations on assembled component dimensions
9 Requirements for production facilities, manufacturing
processes and production control
10 Storage
11 Testing of components
12 Marking
Annex
A (normative) Determination of glue line shear strength
Tables
1 Selection of adhesive for service classes
2 Moisture content enhancement factors for wood based panels
3 Recommended limits of cupping when cramping pressure is
used
4 Sizes and maximum spacings of nails for nail pressure on
glue line
Figures
1 Examples of nail spacing
A.1 Shearing tool
A.2 Dimensions of test specimens
List of references
Covers the manufacturing details of structural components such as box beams and stressed skin panels made from timber or wood-based panels that are glued together.
| Committee |
B/518
|
| DevelopmentNote |
Supersedes 95/107127 DC and BS 6446(1984) (09/2005) Reviewed and confirmed by BSI, November 2008. (11/2008)
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard specifies the requirements for the manufacture of structural components which have been designed using either: design or load testing data from BS 5268 : Part 2; properties established from European Technical Approvals; information derived from prototype testing according to BS 5268 : Part 2. In such components (e.g. box beams, single web beams, stressed skin panels, gusseted trusses) made from separate pieces of timber, plywood or other wood based panels that are glued together, the continued integrity of the glue line is essential for satisfactory performance in service. Requirements are specified for production facilities, materials, types of joint, production, production control, the use of preservative and flame retardant treated materials and storage. Glued laminated timber structural members and finger joints in structural softwood are specified in accordance with BS EN 386 and BS EN 385 respectively. NOTE. Components manufactured in accordance with this British Standard may not be suitable for use in service class 3 of DD ENV 1995-1-1 and BS 5268 : Part 2 where they are exposed directly to the weather, e.g. marine structures.
| BS EN 322:1993 | Wood-based panels. Determination of moisture content |
| DD ENV 1995-1.1 : DRAFT DEC 1994 | EUROCODE 5 - DESIGN OF TIMBER STRUCTURES - GENERAL RULES AND RULES FOR BUILDINGS (TOGETHER WITH UNITED KINGDOM NATIONAL APPLICATION DOCUMENT) |
| BS 5268-5:1977 | Code of practice for the structural use of timber Preservative treatments for constructional timber |
| BS 6138:1981 | Glossary of terms used in the adhesives industry |
| BS EN 386:2001 | Glued laminated timber. Performance requirements and minimum production requirements |
| BS 6100-4.3:1984 | Glossary of building and civil engineering terms. Forest products Wood based panel products |
| BS 6100-4.5:1984 | Glossary of building and civil engineering terms. Forest products Cork |
| BS EN 385:2001 | Finger jointed structural timber. Performance requirements and minimum production requirements |
| BS 5450:1977 | Specification for sizes of hardwoods and methods of measurement |
| BS EN 301:2013 | Adhesives, phenolic and aminoplastic, for load-bearing timber structures. Classification and performance requirements |
| BS 5268-2:1984 | Structural use of timber. Code of practice for permissible stress design, materials and workmanship |
| BS 6100-4.2:1984 | Glossary of building and civil engineering terms. Forest products Sizes and quantities of solid timber |
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