Load shift detected at a roadside check
You are carrying 22 tonnes of bagged cement on a flatbed semi-trailer. The bags are stacked 1.8 m high and covered with a tarpaulin. You used webbing straps every 1.5 m along the load, each rated at 2 tonnes lashing capacity, attached to the trailer side rails. After 90 km, including a section of rough road and a roundabout, you stop for fuel. Walking around the trailer you see the tarp has sagged on the left side, some straps have slackened, and the load has visibly leaned toward the left. The side rail anchor points on that side show slight distortion. Gross weight is within limits and axle loads were checked at departure.
1. Assess the security of this load and identify what went wrong.
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Assessment: The load is not secure and must not continue as it is. A visible lean, slackened straps and a sagging tarp indicate the stack has shifted. Distorted side-rail anchor points mean the lashing system has been overloaded or loaded in a direction it was not designed for.
What likely went wrong:
- Bags settle and compress in transit, so strap tension is lost - straps must be re-tensioned after the first few kilometres and checked periodically.
- A 1.8 m stack of bags has a high centre of gravity and low inter-bag friction; without dunnage, interlayer sheets or edge protection the stack can lean and collapse.
- Side rails may not be rated as lashing points for the full load; anchoring to them can distort them and reduce restraint.
- The tarp hides the load - a tarp is weather protection, not load restraint.
Action: Do not move until the load is made safe: re-stack/square up the load, add friction or interlayer measures, use correctly rated anchor points, re-tension and re-check. Report the distorted rails as a defect.
2. How would you make the load safe before continuing, and how would you verify it?
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Make safe:
- Remove the tarp on the affected side and re-stack the bags so the load is square, level and against a headboard or suitable restraint.
- Add friction measures (e.g. interlayer sheets or mats) and edge protection under straps to spread load and protect bags.
- Re-lash using rated anchor points, not distorted side rails; use enough straps and tension them properly, with a tension indicator or check by hand.
- Replace the tarp and secure it so it cannot flap or hide load movement.
Verify:
- Walk round and check the load is square and stable, straps taut and not cutting the load, tarp secure.
- Re-check after the first few kilometres and at each stop.
- Record the distorted rails and any damaged straps as defects and report them.
If you cannot make it safe with the equipment on board, do not continue - arrange re-securing or recovery.