A Model from CREATIVE PARK - Canon. Large-scale off-road dump trucks are mostly used to transport earth and sand. While in Japan only dump trucks with load capacities of up to 11 tons can drive on ordinary roads, there is no restriction on the load capacities of off-road dump trucks used on large-scale civil engineering and construction sites and in locations such as mines and quarries. Larger models can carry loads of as much as 300 tons. The HD785-7 has a load capacity of 91 tons, and huge wheels over two meters high.