ADR CLASSIFICATIONS
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a The ADR regs classify dangerous goods into five types: EX/II and EX/Ill are explosives; FL covers flammable liquids with a flash point below 61T and flammable gases; DX identifies oxidising chemicals; AT refers to hazardous goods not covered by FL or OX carried in quantities over 3,00011t.
The level of protection required on a vehicle is determined by its ADR classification.
When a vehicle is carrying explosives or inflammable liquids avoiding sparks is a really good idea. Prerequisites include pro tected wiring, a main switch to cut off all electrical power and exhaust shields; cab trim materials must have a burn rate of less than 100m mimin.
Speed limiters and ABS are required on most classes of ADR vehicle, and they must be able to maintain a steady speed of 30km/h on a 6km downhill gradient of 7% without resort to their service brakes.
Diesel-fuelled cab heaters must be removable and must not have timer-operated automatic start-up controls.