BS 4978:1996 Specification for visual strength grading of softwood
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This British Standard specifies a method of strength grading softwood visually for structural use.
The permissible limits of characteristics for two visual strength grades of softwood, General Structural Grade (GS) and Special Structural Grade (SS) are specified.
This permissible limits of characteristics for two visual stregth grades of sofwood, General Structural Grade (GS) and Special Structural Grade (SS) are specified.