BS 4978:1973 - Specification for timber grades for structural use

BS 4978:1973

Specification for timber grades for structural use

Status : Revised, Withdrawn   Published : August 1973 Replaced By : BS 4978:1988

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Specifies structural timber assessed by visual or machine stress grading. Requirements are given for sizes, deviations in size, processing reductions, knots, fissures, slope of grain, wane, rate of growth, resin pockets, distortion, wormholes and other defects. Illustrations show the principles of knot projection to estimate the knot area ratio in visual grading and the measurement of other characteristics affecting strength.




Standard NumberBS 4978:1973
TitleSpecification for timber grades for structural use
StatusRevised, Withdrawn
Publication Date13 August 1973
Withdrawn Date30 November 1988
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 4978:1988
Amended ByAMD 4567
AMD 1869
AMD 2508
AMD 2730
AMD 2935
Draft Superseded By72/10915 DC
DescriptorsWood, Structural timber, Construction materials, Grades (quality), Grading (quality), Visual inspection (testing), Non-destructive testing, Mechanical testing, Test equipment, Strength of materials, Stress, Marking, Measurement, Knots (wood)
ICS79.040
Title in FrenchQualites de bois de construction. Specification
Title in GermanBauholzsorten. Spezifikation
CommitteeB/518
ISBN0 580 07997 X
PublisherBSI
FormatA4
DeliveryNo
File Size1.011 MB
Price£182.00


WITHDRAWN TITLE
*To ask about withdrawn titles contact the
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