Rough patchwork repairs near the top of the box can catch and hold sticky materials. From side to side it is best to load as evenly as possible. If material is likely to flow poorly, lighten up the load in the top end of the box. A slightly smaller load will be better than a full load that causes a tip-over. Box liners will help most materials flow better during dumping.
Liners also help to keep the box in good condition.
Dumping Operators should be trained to recognize areas hazardous to dumping, such as soft or uneven surfaces and inadequately compacted fill. Before dumping, operators should ensure that the tailgate is unlocked and that the vehicle is on a reasonably level surface. Dumping on surfaces that are not level is one of the main causes of tip-overs. Before spreading material by dumping it from a moving truck, make sure that the entire length of travel is reasonably level. Trucks should not dump when they are parked side by side with another vehicle.