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THE Top Tip – Ace of Spades – Transverse Trailer Stability

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When moving loads on hydraulic trailers, the strength of the trailer is critical but so too is its inherent stability.

Many factors affect transverse stability such as inertia acting on the cargo as the trailer’s changes speed or direction, as well as wind or other environmental loads.

For sites where there may be uneven ground to contend with, the maximum declivity across the trailer(s) as a result of slopes on the surface being negotiated must be added to the factors under consideration. This is especially true for moves that employ a narrow trailer train.

Stability of the trailer is said to be unsafe if the maximum pressure in the circuit on the low side of the trailer exceeds a maximum safe value, referred to as hydraulic stability. It can also be exceeded in cases where the slope across the width of the trailer causes the centre of gravity of the system to move beyond the vertical support centre which is represented by the pivot point between outboard axle lines.

Thorough site survey, planning of routes and diligent selection of trailer layout may ensure that stability is well understood and environmental limits, if any are needed, are appropriately applied.