BS 2482:1981

Cooperating organizations
Foreword
1 Scope
2 References
3 Definitions
4 Types of timber
5 Dimensions
6 Construction
7 Timber quality
8 Marking
Appendix A - Criteria for assessing stress grading machines
             measuring the modulus of elasticity of timber
             in bending as a plank
Appendix B - Machine calibration requirements
Appendix C - List of recommended competent authorities
Appendix D - Method of test for the determination of the
             bending strength of scaffold boards
Appendix E - Performance characteristics of scaffold boards
Figure 1 - Typical knots and groups of knots
Table 1 - Timbers for scaffold boards
Table 2 - Cross-sectional sizes
Table 3 - Maximum span of scaffold boards
Table 4 - Settings for computermatic MkP4A and MkP4B
Table 5 - Settings for Cook-Bolinder SG-AF
Table 6 - Strength performances
Publications referred to

Specifies requirements for three thicknesses of scaffold board (38 mm, 50 mm, and 63 mm), of width of 225 mm. Describes two alternative means of assessment of timber quality, these being either visual or machine stress grading.