BS 5268-3:2006

Superseded

View Superseded by

STRUCTURAL USE OF TIMBER - PART 3: CODE OF PRACTICE FOR TRUSSED RAFTER ROOFS

Available format(s)

Hardcopy , PDF

Superseded date

03-30-2010

Language(s)

English

Published date

01-01-2006

Publisher

British Standards Institution

Committees responsible
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Assessment of structural adequacy
5 Materials
   5.1 Timber
   5.2 Plywood
   5.3 Fasteners
   5.4 Adhesives
   5.5 Preservative treatment
6 Trussed rafter design
   6.1 General
   6.2 Limitations
   6.3 Permissible stresses, fastener loads and nail
        spacing
   6.4 Loads
   6.5 Method of design
7 Roof design
   7.1 Design responsibilities
   7.2 Overall stability
   7.3 Wall plates
   7.4 Plasterboard ceilings
   7.5 Water tanks
   7.6 Hatch, chimney and other openings
   7.7 Roof environment
8 Fabrication
   8.1 General
   8.2 Assembly
   8.3 Marking
9 Handling, storage and erection
   9.1 Handling and transportation
   9.2 Storage
   9.3 Erection
   9.4 Modification and repairs
10 Load testing
   10.1 General
   10.2 Testing authority
   10.3 Information required by the testing authority
   10.4 Quality and fabrication of trussed rafters for test
   10.5 Tests on similar configurations
   10.6 Acceptance
   10.7 Use of tested trussed rafters
11 Exchange of information
   11.1 Information required by the trussed rafter designer
        from the building designer
   11.2 Information to be provided by the trussed rafter
        designer to the building designer
Annex A (normative) - Roof bracing
Annex B (normative) - Permissible spans
Bibliography

Gives guidance on the design, fabrication and use of trussed rafters for roofs in service classes 1 and 2 as defined in 3.1 and 3.2. Guidance is provided on structural analysis methods, engineering design criteria and design by testing. Performance requirements for roof bracing are given, together with standard bracing arrangements for domestic scale roofs. Production requirements are also given for truss manufacture, along with guidance on their handling, storage and erection. Maximum spans for two common truss configurations for a range of member sizes and roof pitches are given, based on extensive tests.

Committee	B/525/5
DevelopmentNote	Supersedes BS 5268-3(1998) & 05/30130598 DC (07/2006)
DocumentType	Standard
Pages	74
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN 1995-1-1 : 2012 BS EN 1995-1-1:2004+A2:2014

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BS 6399-3(1988) : 1988	LOADING FOR BUILDINGS - PART 3: CODE OF PRACTICE FOR IMPOSED ROOF LOADS
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BS EN 595:1995	Timber structures. Test methods. Test of trusses for the determination of strength and deformation behaviour
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BS 4978:1996	Specification for visual strength grading of softwood
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BS 1230-1:1985	Gypsum plasterboard Specification for plasterboard excluding materials submitted to secondary operations
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BS 8103-1:1995	Structural design of low-rise buildings Code of practice for stability, site investigation, foundations and ground floor slabs for housing
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