30 square meters. The first four, the last eight and the 7 m 2 carts can generally pull about 30 cubic meters of sand, belonging to large trucks, with large volume, fast engine running speed, strong load-bearing capacity and more sand without effort. This is mainly judged according to the horsepower of the car and the specifications of the container. If you want to pull more goods, you have to add half a trailer. If it is overloaded, it is easy to puncture and roll over.