Standard

BS 4978:2007+A2:2017

Visual strength grading of softwood. Specification

Current

•

Published:

1   Scope

This British Standard specifies a methodology for the visual strength grading of softwood for structural use.
The permissible limits of characteristics are specified for two visual strength grades of softwood:
  • • GS ‒ General Structural; and
  • • SS ‒ Special Structural.
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Product Details
Descriptors
Quality control
Softwoods
Visual inspection (testing)
Marking
Wood grain
Structural timber
Knots (wood)
Sawn timber
Grading (quality)
Construction materials
Symbols
Grades (quality)
Wood defects
Wood
Strength of materials
Dimensional measurement
Certification (approval)
Approval testing
Inspection
Acceptance (approval)
ICS Codes
79.040 Wood, sawlogs and sawn timber
Committee
B/518
International relationships
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ISBN
978 0 580 97589 9
Publisher
BSI