BS 4978:1973

Specification for timber grades for structural use

BSI Group , 06/01/1979

Publisher: BS

File Format: PDF

$132.00$264.16

Description

Standard By:BSI Group , 06/01/1979

Published:06/01/1979

Pages:23

ISBN(s):058007997X, 058007997

File Size:1 file

Language:English

Note:This product is unavailable in Ukraine, Russia, Belarus

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.