It is understood that with the rapid development of urban construction, high-rise hotels, office buildings, commercial buildings, residential buildings and other types of high-rise buildings are being constructed in large numbers, and there is a trend of higher and higher building heights and more and more building accommodation personnel. A large-scale urban complex integrating business, dining, entertainment, and office can accommodate up to 50,000 people. When a fire occurs in a high-rise building, it is the firefighter's priority to rescue the trapped people's lives. The fire elevator serves as a quick and convenient delivery facility for high-rise building fires in the vertical direction, and it can play a crucial role in saving the lives of critically wounded people. However, due to the lack of car dimensions in fire elevators using high-rise buildings, it is difficult to fully meet this requirement.

The current "High-rise Civil Building Design Fire Prevention Code" does not specify the size of the fire elevator car, and it is difficult to accommodate a flat stretcher when rescuing the critically injured. A fire elevator is a special elevator for firefighters to perform firefighting and rescue when a fire occurs in a high-rise building. At the beginning of the 1980s, there were not many high-rise buildings in China. When compiling the “High-rise Civil Building Design Fire Protection Code”, it only considered how to extinguish the fire more effectively. Regulation 6.3.1 of the Code for Design of Fire Protection for High-Rise Civil Buildings makes the following provisions: Class 1 public buildings, tower houses, 12-storey and 12-storey unit residences and corridor-style residences, with a height exceeding 32m of other types of public buildings should be set up fire elevators.

Thus, at the beginning of the “Fire Protection Code for Design of High-Rise Civil Buildings”, only the requirements for firefighters to maintain their strength to carry out firefighting battles were taken into account. It was not considered whether the car size could meet the requirements for use. The size of the stretcher rescues the critically wounded from the need of a fire elevator. It is precisely because there is no specific stipulation on the size of the fire elevator car in the "High-rise Civil Building Design Fire Protection Code", which has resulted in the use of flat stretchers to quickly rescue critically used fires in high-rise buildings. The condition of the wounded.