Container Weight, Axle Overload, and an Intact Customs Seal
At a Manila container yard you are assigned a 20-ft container said to hold steel coils. The booking note and seal are intact and the manifest declares 24,000 kg gross. The gate weighbridge prints: steer axle 6,800 kg; drive tandem 21,000 kg; trailer tandem 18,700 kg; gross 46,500 kg. Your tractor’s plate allows 6,000 kg on the steer axle and 18,000 kg on each tandem; the permitted GCW is 45,000 kg. Your fifth wheel is currently in the middle position, and the trailer tandems are set one hole forward of center. The shipper’s agent says the weighbridge “reads high” and asks you to sign the manifest and proceed to the port. Customs rules prohibit breaking the seal without authorization. A yard crane and a re-stowing area are available. Your 10:00 cut-off is at risk.
1. Assess the axle and gross weights. Is the unit legal to move over the road? Show calculations.
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No, it is overloaded on every measured axle and on gross weight.
- Steer axle: 6,800 − 6,000 = 800 kg over.
- Drive tandem: 21,000 − 18,000 = 3,000 kg over.
- Trailer tandem: 18,700 − 18,000 = 700 kg over.
- Gross: 46,500 − 45,000 = 1,500 kg over.
The steer axle is the most safety-critical overload because it carries steering and much of the braking force. The drive tandem overload is the largest and suggests the load’s center of gravity is too far forward or too concentrated. The declared 24,000 kg also does not match a 46,500 kg gross, so the documentation is unreliable. Signing the manifest would make me party to a false declaration, and moving the unit would expose the axles, tires, brakes, and bridge structures to loads above their rating.
2. Can you correct this by sliding the fifth wheel and trailer tandems? Explain using load-transfer reasoning.
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Only partly, and not enough for this load. Moving the fifth wheel rearward transfers weight from the steer axle to the drive tandem; that would fix the steer overload but make the 3,000 kg drive overload worse. Moving it forward does the opposite: it adds weight to the steer axle, which is already 800 kg over. Moving the trailer tandems shifts weight between the trailer tandem and the drive tandem, but the total does not disappear, and the drive tandem is already the worst axle.
A realistic slide may move a few hundred kilograms, not 3,000 kg. The steel coils are also concentrated, so the load may need re-stowing or splitting rather than a suspension adjustment. I would not “fix” the scale by sliding the fifth wheel to hide the steer overload while leaving the drive tandem illegal. The proper correction is to re-stow or offload at the yard, then re-weigh and confirm every axle and the gross are within limits.
3. What do you do about the seal, the documents, and the agent’s request?
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I would not break the seal, sign the manifest as correct, or move the unit. The seal is a customs control; breaking it without authorization can create a smuggling or tampering problem far more serious than a late delivery. I would tell the agent plainly: “The steer axle is 800 kg over, the drive tandem is 3,000 kg over, the trailer tandem is 700 kg over, and gross is 1,500 kg over. I cannot sign for that.”
I would notify my dispatcher, the customs broker, the shipping line, and the consignee, and request written authorization for an authorized de-stuffing or re-stowing at the container yard. I would ask for a revised weight ticket and amended manifest after re-weighing. I would record the original weighbridge print, the time, the agent’s request, and my refusal in the trip report, and keep copies. If authorization does not arrive, the unit stays put; a missed cut-off is a commercial issue, while an overloaded, misdeclared container is a legal and safety issue.