BS 4978(1988) : 1988被替代
SPECIFICATION FOR SOFTWOOD GRADES FOR STRUCTURAL USE
出版：British Standards Institution
专家解读视频
Gives visual and machine stress grading for structural softwood. Provides parameter limits for General Structural Grade (GS) and Special Structural Grade (SS) softwood and LA, LB and LC laminating grades. Describes Machine General Structural (MGS), Machine Special Structural (MSS), M50 and M75 and Strength Classes for machine stress grade. Gives performance parameters for structural softwood stress grading machines. Includes both machine and output controlled systems. Excludes machines which grade softwood for grades limited for specific end uses. Includes details of acceptance of stress grading machines.
ISO 2301 : 1973(R2018) - Similar to
ISO 1030 : 1975(R2019) - Similar to
ISO 2299 : 1973(R2018) - Similar to
ISO 2300 : 1973(R2010) - Similar to
ISO 2300 : 1973(R2010) - Similar to
ISO 1030 : 1975(R2019) - Similar to
ISO 2301 : 1973(R2018) - Similar to
ISO 2299 : 1973(R2018) - Similar to
