BS 5268-7.5:1990 - Structural use of timber. Recommendations for the calculation basis for span tables. Domestic rafters – BSI British Standards

BS 5268-7.5:1990

Structural use of timber. Recommendations for the calculation basis for span tables. Domestic rafters

Status : Withdrawn, Superseded   Published : July 1990 Replaced By : BS EN 1995-1-1:2004+A2:2014

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BS 5268-7.5:1990 recommends a calculation basis for the permissible clear span for rafters for roofs with a slope from15° to 45°. The recommendations apply to rafters at a maximum spacing of 610 mm centre-to-centre, this being the maximum spacing for which the “load-sharing” assumption may be adopted as described in BS 5268-2. The method of calculation makes no allowance for any contribution of other parts of the roof to the load resistance of the rafters although it is assumed that the tiling battens are capable of providing lateral load distribution and lateral support. It does not cover the design of rafters taking account of a structural contribution by sheet material supporting the roofing where such action can be provided by adequate design of its attachments as in a stressed skin panel roof. The uniform and concentrated loads of BS 6399-1, are considered. Provision is made for a uniformly distributed snow load derived from BS 6399-3.

BS 5268-7.5:1990 is applicable to the species and grades of timber given in BS 5268-2.




Standard NumberBS 5268-7.5:1990
TitleStructural use of timber. Recommendations for the calculation basis for span tables. Domestic rafters
StatusWithdrawn, Superseded
Publication Date31 July 1990
Confirm Date01 November 2007
Withdrawn Date24 November 2009
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)BS 565, BS 648, BS 4471:Part 1, BS 4978, BS 5268:Part 2, BS 5268:Part 3, BS 6100:Section 2.1, BS 6100:Section 4.1, BS 6100:Section 4.2, BS 6100:Section 4.3, BS 6100:Section 4.4, BS 6399:Part 1, BS 6399:Part 3, ISO 3898, CIB-W18-1
Replaced ByBS EN 1995-1-1:2004+A2:2014
Draft Superseded By86/15294 DC
DescriptorsStructural timber, Wood, Rafters, Roofs, Pitched roofs, Construction systems parts, Structural design, Design, Design calculations, Formulae (mathematics), Spaced, Length, Size, Angles (geometry), Loading, Bending stress, Stress analysis, Equations, Deformation, Tables (data), Domestic
ICS91.060.20
91.080.20
Title in FrenchUtilisation du bois en construction. Recommandations relatives aux bases de calcul des portées. Chevronnage
Title in GermanVerwendung von Holz im Bauwesen. Empfehlungen fuer die Berechnung von Spannweitentabellen. Dachsparren in Wohngebaeuden
CommitteeB/525/5
ISBN0 580 17959 1
PublisherBSI
FormatA4
DeliveryNo
Pages28
File Size754.8 KB
Price£129.00


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