PLT/Attachments/TBT-PLT-061

Trailer Safety Loading and Hitching

Plant & Equipment › Attachments › Trailer Safety Loading and Hitching

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Incorrect loading and hitching of trailers causes overturning, detachment, and crush injuries on construction sites.
The Road Vehicles (Construction and Use) Regulations 1986 set legal requirements for trailer loading and towing.
Load distribution is critical — too much weight at the rear causes dangerous snaking at any speed.
The recommended nose weight is typically 5–7% of the total laden trailer weight for stable towing.
Hitching a trailer is a high-risk activity — crush injuries between vehicle and trailer are common.
The tow ball, jaw, or pin must be compatible with the trailer coupling and rated for the load.
Breakaway cables must be attached to the towing vehicle chassis, not the tow ball or tow bar.
Trailer brakes must be tested and working before departure — check both service and parking brakes.
Load restraint using ratchet straps, chains, or side boards must prevent any load movement during travel.
Overloaded trailers cause tyre blowouts, brake failure, and loss of steering control at road speeds.

Prevent detachment	A trailer separating from the towing vehicle at speed is an uncontrolled projectile weighing several tonnes.
Crush injuries	Most hitching injuries occur when workers stand between the vehicle and trailer without wheel chocks in place.
Load security	An unsecured load shifting during transit changes the trailer's centre of gravity and causes sudden overturning.
Legal prosecution	Insecure loads and overloaded trailers are criminal offences enforceable by police and DVSA on public roads.

Don't

Chock trailer wheels and apply the handbrake before standing between vehicle and trailer.
Check the coupling, safety chain, and breakaway cable connection before every tow.
Distribute the load evenly with correct nose weight on the tow ball or hitch point.
Secure all loads using rated ratchet straps, chains, or approved restraint methods.
Test trailer brakes, lights, and indicators before leaving the loading area.
Ensure the trailer gross weight does not exceed the tow vehicle's rated capacity.
Lower the jockey wheel fully after unhitching and chock wheels on both sides.
Walk around the complete combination checking tyres, wheel nuts, and load security.
Use a banksman when reversing to hitch or position the trailer in tight spaces.
Carry the correct fire extinguisher and warning triangle for road use trailers.

DON'T stand between vehicle and trailer during hitching without wheels chocked first.
DON'T tow with the jockey wheel down or the safety chain dragging on the ground.
DON'T load all the weight at the back of the trailer — this causes snaking.
DON'T use rope, bungee cords, or cable ties as primary load restraint on trailers.
DON'T tow on public roads without working lights, indicators, and a number plate.
DON'T exceed the maximum gross weight stamped on the trailer chassis plate.
DON'T allow anyone to ride on or inside the trailer while it is being towed.
DON'T hitch a trailer to a vehicle without checking the tow ball rating matches.
DON'T leave a detached trailer on a slope without the handbrake and wheel chocks.
DON'T skip the walk-around check because you loaded the trailer yourself earlier.

See also: Towing and Trailer Safety | Reversing and Banksman Procedures

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