Materials, dimensions, power provision, stability and positioning of portable and mobile screw conveyors (augers) constructed of carbon steel and stainless steel in sizes from 100 mm to 250 mm nominal diameter.Cross References:BS 970:Part 1BS 1449:Part 1BS 1449:Part 2BS 3733BS 3790BS 4409:Part 1BS 4506BS 6323:Part 1BS 6323:Part 3BS 6323:Part 8Institution of Electrical Engineers Regulations