BS 5268-3:2006 - Structural use of timber. Code of practice for trussed rafter roofs – BSI British Standards

BS 5268-3:2006

Structural use of timber. Code of practice for trussed rafter roofs

Status : Superseded, Withdrawn   Published : June 2006 Replaced By : BS EN 1995-1-1:2004+A2:2014

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BS 5268-3:2006 covers the design, fabrication and use of trussed rafters for roofs. For the purposes of the standard, trussed rafters are assumed to be made from timber members of the same thickness fastened together by metal plate fasteners or plywood gussets. Trussed rafters usually span between external load-bearing walls without the need for intermediate supports from internal walls, lintels or purlins.

This standard provides recommendations on the strength grades of timber used in the fabrication of rafters and other critical design issues. Guidance on the handling, storage and installation of fabricated rafters is given. Information to be exchanged between the trussed rafter designer and the building designer is also listed. 

Guidance is provided on:

  • structural analysis methods 
  • engineering design criteria
  • standard bracing arrangements for domestic scale roofs  
  • performance requirements for roof bracing
  • production requirements for truss manufacture 
  • truss handling, storage and erection
  • design by testing.

Based on extensive tests, the maximum spans for two common truss configurations for a range of member sizes and roof pitches are given.




Standard NumberBS 5268-3:2006
TitleStructural use of timber. Code of practice for trussed rafter roofs
StatusSuperseded, Withdrawn
Publication Date30 June 2006
Withdrawn Date30 March 2010
Normative References(Required to achieve compliance to this standard)BS 1230-1, BS 4978, BS 5268-2, BS 5268-5, BS 5534, BS 6100-4, BS 6399-1, BS 6399-2, BS 6399-3, BS 6446, BS 8103-1, BS 8212, BS EN 301, BS EN 336, BS EN 385, BS EN 595, BS EN 10088-2, BS EN 10326, BS EN 14081-1
Informative References(Provided for Information)BS 5250:2002, BS 8417:2003, BS EN 380:1993, BS EN 14250:2004, prEN 14545
Replaced ByBS EN 1995-1-1:2004+A2:2014
ReplacesBS 5268-3:1998
Amended ByAMD 16541
AMD 16972
AMD 16541 and AMD 16972 are Corrigenda.
Draft Superseded By05/30130598 DC
DescriptorsStructural timber, Wood, Roof trusses, Rafters, Pitched roofs, Roofs, Beams, Ties (structural members), Plywood, Structural design, Structural members, Moisture, Dimensions, Wood preservation, Nailing, Loading, Imposed loading, Wind loading, Ventilation, Spaced, Joints, Assembling, Erecting (construction operation), Deformation, Marking, Acceptance (approval), Instructions for use, Domestic facilities, Chimneys, Adhesives, Test methods
ICS91.060.20
91.080.20
Title in FrenchUtilisation du bois en construction. Code de bonne pratique des toits a jambes de force
Title in GermanVerwendung von Holz im Bauwesen. Richtlinie fuer Kehlbalkendaecher
CommitteeB/525/5
ISBN0 580 47340 6
PublisherBSI
FormatA4
DeliveryYes
Pages74
File Size3.286 MB
Price£279.00


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