3) the current capacity to accommodate stretchers. For a long time, China's residential use of the elevator load is 630 kg, the car size can not meet the requirements of the size of the stretcher. The relevant industry almost did not propose other types of elevator standards for architectural designers use. Therefore, although the "residential design norms" in 1999, there is a condition to "should be equipped with a stretcher can accommodate the elevator" requirement, but the implementation of difficult to implement. With the increase in the number of high-rise residential buildings in recent years, the number of servants per elevator increased accordingly, and from the requirements of building energy efficiency, both to meet the usual use requirements of households, but also to accommodate stretchers into the current social real estate and household The demand.

By the National Elevator Standardization Technical Committee, in June 2009 the implementation of the national recommended standard Atlas "elevator main parameters and car, shaft, room type and size", while the load 450 kg, the car net depth of 1 250 mm and load 1 000 kg, car with a net depth of 2 100 mm. The survey found that the choice of small-scale elevator needs more than the choice of large-scale. The reason can not be simply interpreted as "real estate business for economic practical and aesthetic considerations." We believe that from a technical and economic point of view, the new model of 2 100 mm is still worthy of certification. In particular, the new model, "a stretcher with a removable handle," can be carried out in the standard, "the stretcher of the detachable handle", so that if the ambulance is a stretcher with a non-removable handle, it can not solve the problem. If the stretcher of the detachable handle is accommodated, it is worthwhile for the national residential design to be made without a net depth of 1 850 mm, an increase of 250 mm and its corresponding staircase size. In short, the new product standards in the construction industry's full application also requires a certain run-in period.