BS 4978:1988 - Specification for softwood grades for structural use

BS 4978:1988

Specification for softwood grades for structural use

Status : Revised, Withdrawn   Published : November 1988 Replaced By : BS 4978:1996

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Specifies 2 methods of grading softwood namely, visual and machine stress grading. Permissible limits of characteristics for: (a) 2 visual stress grades - General Structural (GS) and Special Structural (SS); (b) 3 laminating grades - LA, LB and LC. Requirements for machine stress grades; Machine General Structural (MGS), Machine Special Structural (MSS), M50 and M75 and Strength Classes are specified. Also includes performance requirements for machines which grade softwood.




Standard NumberBS 4978:1988
TitleSpecification for softwood grades for structural use
StatusRevised, Withdrawn
Publication Date30 November 1988
Withdrawn Date15 August 1996
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Replaced ByBS 4978:1996
ReplacesBS 4978:1973
Amended ByAMD 6400
AMD 6915
AMD 8449
Draft Superseded By86/10018 DC90/15799 DC93/104870 DC
DescriptorsWood, Softwoods, Structural timber, Sawn timber, Planed timber, Wood grain, Wood defects, Knots (wood), Construction materials, Quality control, Grades (quality), Grading (quality), Certification (approval), Acceptance (approval), Approval testing, Inspection, Defects, Marking, Laminates, Visual inspection (testing), Inspection equipment, Test equipment, Dimensions, Deformation, Letters (symbols), Formulae (mathematics), Wood grain, Scribers, Machine tools, Modulus of elasticity, Flaws
ICS79.040
Title in FrenchBois tendres pour la construction. Spécifications
Title in GermanWeichholz fuer das Bauwesen
CommitteeB/518
ISBN0 580 17075 6
PublisherBSI
FormatA4
DeliveryNo
Pages36
File Size3.259 MB
Price£186.00


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