Trailer PRONAR T701HP with half-pipe type loading box was designed for specific requirements of clients from the construction industry. The trailer is characterized by a stable and universal construction with a tight loading box with a hydraulically opened rear tailgate. The trailer is equipped with a bogie suspension on parabolic springs with a 1600 mm wheelbase and a large tilting angle, which works well in difficult conditions. The chassis frame is also adapted for mounting the hydraulic drawbar with variable height adjustment. Trailer PRONAR T701HP was created for use in difficult terrain conditions, especially useful in the implementation of large road projects, in gravel pits for the transport of loose materials: gravel, sand, rocks, stones, or debris. The dumper works in a set with the tractor, perfectly replacing the traditionally used trucks. The trailer + tractor set are better at navigating difficult or marshy terrain. In addition, this combination offers clear benefits on the cost side in relation to trucks and tipping.