Construction and performance requirements with environmental test procedures. To be read in conjunction with Sections of BS 473-3Cross References:BS 2011:Part 2.1ABS 2011:Part 2.1BBS 2011:Part 2.1FcBS 2754BS 3456:Part 101BS 4737:Part 1BS 5490BS 5750BS 6667:Part 2BS 6667:Part 3