Fire ladders are usually steel stairs and are intended for use by firefighters. The location and number are determined by the nature of the building, the number of floors and fire protection requirements. There are two types of fire ladders: straight and inclined: the straight type is mostly steel ladder, which is only used in the range of one or two height difference; the inclined type slope is 60°~80°, and the handrail, the fence and the cantilever are required. Rest platform, etc. In order to meet the needs and safety of the high-rise buildings, there are left and right lifts of not less than 600 × 700 mm on the platform. The lowest level of the fire ladder must be 2 to 2.5 meters from the ground to prevent idlers from climbing.
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