Load Restraint

How do I choose the right load restraint?

The performance standard

Under the NHVR Load Restraint Guide, a restraint system must withstand at least 0.8g forward, 0.5g sideways, 0.5g rearward and 0.2g upward. Forward is the largest force and usually decides the equipment you need.

Lashing Capacity (LC) — the number that matters

Lashing Capacity is the maximum force (in kg) a strap or chain system is rated to sustain. It is not the breaking strength (which is higher) and not the pre-tension (which is lower). Match LC to the load:

• For direct restraint, combined forward LC should be about twice the load's weight; sideways and rearward about once each.
• Lashing angle reduces effective capacity — keep direct lashings under about 25° from the deck to use the simple rule.
• Every strap, chain and binder must be marked with its LC; the lowest-rated component sets the whole system.

Strap, chain or rope?

• Webbing ratchet straps — general and lighter loads; carry roughly 5–10 times the tension of rope.
• Rated transport chain + a matched load binder — heavy, rigid or unstable loads (machinery, steel). The binder's rating must match the chain's.
• Rope — only light, low-risk securing. Rope stretches up to about 20% before reaching its capacity and is not suitable as the primary restraint for heavy loads.

Common mistakes to avoid

• Buying straps or chain whose combined LC is below the load — forward restraint needs roughly 2× the load weight.
• Reading the breaking-strength number instead of the LC.
• Unrated chain, or a load binder rated below the chain.
• Using rope to restrain a heavy or rigid load.

The Load Restraint Guide is free from the NHVR (a separate light-vehicle edition covers utes and trailers) and is the authoritative reference — always check the rating marked on the product against your load.