Ratchet Strap Guide: Load Securing for Trailers and Flatbeds

Understanding Safe Working Load (SWL)

Every ratchet strap has a safe working load (SWL) — the maximum tension it is rated to apply in normal use. This is not the same as the load weight it can restrain. In a basic over-the-top lashing (two straps going over a load), each strap's SWL is halved by the downward angle. For a 1,000kg load secured with two 1-tonne straps over the top, the effective restraint is approximately 1,000kg downward force — adequate only if the load cannot slide sideways. For full restraint in all directions, add diagonal lashings or use four straps.

1-Tonne vs 5-Tonne Straps

• 1-tonne J-hook straps — suitable for pallets, equipment, and loads up to approximately 2 tonnes in a 4-strap arrangement. Sold in boxes of 80 at £6.00 each.
• 5-tonne J-hook straps (8m or 10m) — required for plant machinery, heavy timber packs, steel fabrications, and HGV flat-trailer loads. Sold in boxes of 10. 8m at £15.00, 10m at £16.50 per strap.

Choosing the Right Length

The strap length must be long enough to run from one side rail, over or around the load, and hook onto the opposite rail with enough slack to ratchet tight. A general rule: measure the load height plus the trailer width, then add 1.5–2 metres. Our 5-tonne straps come in 8m and 10m lengths. For wide flatbeds (2.4m+) or tall loads, the 10m strap gives more working length.

Hook Types and Anchor Points

Our straps use J-hooks, the most common type on UK trailers and curtainsiders. J-hooks engage standard rectangular lashing rings. For vehicles with different anchor systems (e.g. E-track, Q-straps), adapters are available separately. Always check that the hook is fully engaged and cannot back out before applying tension.

Inspecting Straps Before Use

Under BS EN 12195-2, ratchet straps must be inspected before each use. Reject any strap with cuts, fraying, knotting, or UV bleaching that has reduced the colour saturation of the webbing. A strap that has been shock-loaded (sudden tensioning under dynamic impact) should be retired even if it appears undamaged. Store straps away from UV light and chemicals when not in use.

Ordering for a Fleet or Depot

For haulage operators and construction companies maintaining a fleet of vehicles, buying ratchet straps in box quantities keeps a working reserve available and reduces per-unit cost. Our 1-tonne straps at 80 per box and 5-tonne at 10 per box are the trade formats used by most logistics operators. Free delivery on orders over £200. Call 07867 476304 for trade account terms.