THE TRAILER DECREASING THE WEIGHT

摘要

A trailer having reduced weight is provided to reduce the weight of the trailer with having reliability of the whole structure by reducing the thickness of a middle plate of an I-shaped beam and the width of upper and lower plates. A trailer having reduced weight comprises: a pair of I-shaped beams(110) having regular length; a side channel positioned apart from the I-shaped beams at constant intervals; and a cross member connecting the side channel and the I-shaped beam in a vertical direction. The I-shaped beam comprises a plurality of sectors whose height is differently formed along the longitudinal direction. The sector comprises: a first sector(111) in which the height of a middle plate is fixed from the front end; a second sector(112) in which a lower plate is inclined downward; a third sector(113) in the middle plate is formed at the same height as the back end of the second sector; a fourth sector(114) in which the front end is formed at the same height as the back end of the third sector; and the fifth sector(115) which is formed at the same height as the back end of the fourth sector.