A 500 kg door on a 40 x 80 mm floor plate?
It might seem impossible that a 500 kg door can rest on a 40 x 80 mm floor plate with 8 mm pins. The pressure of the door is, however, distributed evenly across the floor plate. In fact, the force on the floor is lower than that of a person in high heels. Meanwhile, the weight of the door, the pins, and a special, strong adhesive glue keep the plate in place.
A 500 kg door with a FritsJurgens pivot bears on a 40 x 80 mm floor plate and produces a pressure load (Fw) of 2.31 N/mm2 with a door of 500 kg. In comparison, a person of 70 kg (154 lbs.) wearing high heels produces a pressure load (Fw) of 6.87 N/mm2.