BS 4978:1973 Specification for timber grades for structural use

Abbreviation
BS 4978:1973
Valid from
13/08/1973

Information provider
British Standards Institution
Author
British Standards Institution
Information type
British Standard
Format
PDF


Description

This Standard 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. 

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This resource is cited by:

BS 4978:1973 Specification for timber grades for structural use

This document is CITED BY:

BS 4978:1973 Specification for timber grades for structural use

Description

This Standard 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. 

View on Information Provider website
BS 4978:1973 Specification for timber grades for structural use
Description

This Standard 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. 

View on Information Provider website
This resource does not cite any other resources.

BS 4978:1973 Specification for timber grades for structural use

This resource does not CITE any other resources.
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