An exit ladder, also known as a fire escape ladder or escape ladder, is an external staircase used for safe evacuation of personnel from high places in a building in case of fire or other emergencies. It is usually installed on the exterior wall of a building to complement the internal staircase to provide an additional escape route when the internal staircase is blocked or unusable.
The main functions of an exit ladder are:
Emergency escape:
In the event of a fire, earthquake or other emergency, when the internal staircase is unusable, it provides a passage for personnel to evacuate quickly and safely from a high-rise building to the ground.

Enhanced safety:
When designing a building, an exit ladder can be used as an additional safety measure to improve the overall escape capability and reduce the risk of casualties.

Meet fire regulations:
In many areas, exit ladders are a required component of fire regulations, especially for high-rise buildings.

Aesthetics:
The design of some exit ladders also takes into account the appearance of the building and plays a decorative role.

In summary, an exit ladder is an important safety facility in a building. It enhances the safety of the building in an emergency by providing an additional escape route and meets the requirements of fire regulations.