Moving an Excavator on a Low-Bed Trailer Through Kuwait
A 26 t crawler excavator must be moved 18 km from Ahmadi to a site near Jahra on a three-axle low-bed trailer. The machine is 3.4 m wide over the tracks and 3.6 m high to the cab. The trailer deck is 1.0 m high, so the combined height is 4.6 m. The route includes a flyover marked 4.5 m and a roundabout with overhead sign gantries at 5.0 m. The excavator's bucket is left attached and projects 0.8 m beyond the trailer on one side. The trailer is rated at 40 t payload. The driver holds a heavy-vehicle licence, but no escort vehicle is arranged. It is 13:30 and the police permit office closes at 14:00. The yard gate opens directly onto a four-lane highway with no flagman.
1. Identify the legal and route problems, and state what must be done before the machine leaves the yard.
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The load is overwidth and overheight. The excavator is 3.4 m wide, and the bucket projects 0.8 m beyond the trailer, giving an overall width of about 4.2 m. The combined height is 4.6 m, which exceeds the 4.5 m flyover clearance; even 0.1 m is not a margin for suspension movement or road camber. The route is therefore not viable as planned.
Before departure, the bucket should be removed and transported separately, or the machine repositioned so nothing projects beyond the legal width. A route survey must identify clearances, bridge limits, overhead lines and roundabout constraints. An oversize/overweight permit must be obtained from the Ministry of Interior traffic authority, with any escort, time-of-travel and route conditions. The trailer's payload rating, axle loads and coupling must be checked against the 26 t machine. The driver's licence class and trailer registration must be valid for the combination. The permit office closing at 14:00 is not a reason to travel illegally; the move should be postponed until the permit and route are correct.
2. How should the excavator be loaded and secured on the trailer? Include centre of gravity, bucket, tracks and tie-down points.
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The trailer should be on firm, level ground and chocked. The ramps must be rated for the machine and aligned. The excavator should be driven on slowly in low gear, with a spotter, and centred so its centre of gravity is over the trailer's load bed and between the axles, not behind the rear axle. The bucket should be removed if it causes overwidth, or curled in and lowered to the deck if it can be carried legally.
Once positioned, the arm and bucket should be lowered, the machine's parking brake applied, controls neutralised, and the hydraulic lock engaged. Tracks should be chocked or blocked. Use rated chains and binders at the machine's designated tie-down points, with at least four points and cross-chaining to prevent forward, rearward and sideways movement. Do not rely on the tracks alone or on the bucket for restraint. Fit edge protection where chains contact sharp steel. Check the load height and width after securing, fit flags and lights as required, and re-check tension after the first few kilometres. No one rides on the machine or trailer.
3. The gate opens directly onto a four-lane highway with no flagman. Describe the traffic management and pedestrian separation for departure.
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The departure needs a planned convoy, not a driver edging out into fast traffic. Before the move, position trained flagmen with high-visibility clothing, radios and stop/slow paddles on both approaches to the gate. They must be able to see the convoy and the traffic, and they must not stand in a live lane without protection. The escort vehicle, if required by the permit, should be ready with a beacon and signs.
The gate area should be coned to keep site pedestrians and workers away from the trailer path. A pedestrian walkway should be separated from the vehicle route, and a banksman should control the excavator loading and the trailer departure. The driver should pull out only when the flagmen confirm both directions are clear; the escort should precede the load and warn oncoming traffic. Avoid peak traffic if the permit allows. The site speed limit and the permit conditions apply on the public road. If the traffic volume is too high or the flagmen cannot control it safely, delay the departure rather than force a gap.