What is the main application of trapezoidal steel plates? On bridges, there is usually a slope, and at places with a slope, there is a gap between the supports and the beam body. Adding a trapezoidal steel plate of an appropriate size reduces the load on the supports, preventing damage due to uneven force distribution. On bridges with a slope, it is necessary to pre-bury a steel plate and add a trapezoidal steel plate (leveling plate) between the pre-buried plate and the support plate to level the supports for horizontal placement. When the bottom of the beam has a longitudinal slope, a trapezoidal steel plate that diverges from the bridge's longitudinal slope is installed between the beam bottom and the support to level it. When the beam body has both longitudinal and transverse slopes, trapezoidal steel plates with two slopes, one for the longitudinal slope and one for the transverse slope, are installed between the beam bottom and the support to level it.