When prefabricating prestressed hollow slab beams with longitudinal slopes, how to set embedded bearings at the beam bottom on the precast pedestal?

Beam and slab should be right-angled trapezoid when prefabricated (the bottom of steel plate is horizontal, and the top surface has an inclination opposite to the longitudinal slope). In actual prefabrication, longitudinal slope is generally not considered. First, the longitudinal slope of the bridge is generally small, and the size of the steel plate embedded at the bottom of the beam is generally tens of centimeters, which can be almost ignored if multiplied by the longitudinal slope; Secondly, it is very difficult (in fact, it is completely unnecessary) to embed the beam according to the right-angled trapezoid. Generally, the longitudinal slope of the beam slab is raised on the cushion stone during beam erection, and the bottom elevation of the embedded steel plate should be strictly guaranteed during prefabrication. Of course, if it is a construction site such as a ramp with a particularly large longitudinal slope, the specific problems have to be treated specifically.