What is the slope of the general elevator threshold?
When installing the elevator sill, the elevator door frame edge and floor tile should have a slope of 3 mm, and the top stone outer mouth and door frame edge should have a slope of 2 mm.
Elevator refers to the permanent transportation equipment serving several specific floors in a building, and its car runs on at least two rigid tracks perpendicular to the horizontal plane or with an inclination angle less than15. There is also a step, the pedal is installed on the track and runs continuously, commonly known as escalator or moving sidewalk. Fixed lifting equipment serving designated floors. The vertical elevator has a car, and the car runs between at least two rows of rigid guide rails with vertical or inclined angles less than15. The size and structure of the carriage are convenient for passengers to enter, exit or load and unload goods. Traditionally, regardless of its driving mode, elevators are regarded as the general name of vertical vehicles in buildings. According to the speed, it can be divided into low-speed elevators (below 4m/s), fast elevators 4 ~ 12m/s) and high-speed elevators (above 12m/s). Hydraulic elevators began to appear in the middle of19th century and are still used in low-rise buildings. In 1852, Otis Company of the United States, for example, developed a safety elevator for wire rope hoisting. In the 1980s, the driving device was further improved, such as the motor driving the drum through worm drive, and the counterweight was adopted. At the end of 19, friction wheel transmission was adopted, which greatly increased the lifting height of the elevator.