Trapezoidal steel plates are primarily used in bridges with slopes, usually manufactured from Q345 steel plates. Each bridge has a unique longitudinal slope. When the slope does not exceed 1%, the rubber pad can be directly placed on the pier, but the required thickness due to the slope must be considered. For slopes greater than 1%, a trapezoidal steel plate is added between the embedded steel plate and the steel plate on the support to level the bottom of the beam. The longitudinal slope of the trapezoidal steel plate must match the bridge's designed slope to ensure the pads are level after the beam panels are installed. An incorrect slope can cause uneven pressure on the pads, leading to premature damage and potential operational hazards for the bridge, making it more troublesome to address later. There is no specific specification for trapezoidal steel plates, which are typically custom-manufactured based on the bridge's slope design drawings.