1.We are factory 2.flat or diamond plate 3.it can transport bags thing,stone,sand,containers etc. ... flatbed type and corrugate typesemi trailer manufacturer Platform plate 3mm flat or diamond plate(Also can choose other thickness,such as 2mm ... The height of the beam is 500mm,upper plate is 14mm,down plate is 16mm,middle plate is 8mm.Side beam is 16#Channel ...