Materials, dimensions, design and construction, functional requirements, testing, information to be supplied by purchaser and by supplier for two grades of steel and two types of support.Cross References:BS 410BS 1189BS 1344:Part 2BS 1344:Part 12BS 3380BS 4118BS 4305BS 6100:Subsection 1.5.1BS 6340:Part 5BS 6340:Part 6 BS 6340:Part 7BS 6340:Part 8IEE Regulations for Electrical InstallationsPartially replaced by BS EN 232:2003.