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The fire resistance of cast-in-situ reinforced concrete structures is generally above 3 hours.5 hours to 3 hours.In order to ensure that the fire elevator can continue to work under any fire conditions, the shaft wall of the elevator shaft must have sufficient fire resistance, and its fire resistance level should generally not be home escalator suppliers lower than 2.

This floor is quiet, not affected by car exhaust and so on, and it does not cause people to reach a height of fear. For the upper room, the process is reversed, which causes the air in the upper room to actually flow from the dirty air in the lower room. . The 'back of the head' of the building, 'enjoying' the various types of photoelectric pollution in the city, can it be said that the scenery is good? In fact, many of the high-rise residents who want to view the scenery have become 'landscapes'. Ordinary multi-storey houses are generally brick-concrete structures, and high-rise houses are reinforced with cast-in-situ concrete, with deep and strong foundations, thick walls, impervious to water, and better seismic performance than multi-storey buildings.

The most ideal residence for people should be close to the ground and close to nature. Hitachi's rocket elevator will be installed in the Guangzhou CTF Finance Center, with a total of 111 floors, and is expected to be completed in 2016. However, the low floor is relatively reduced in noise due to the obstruction and absorption of surrounding low buildings and trees. However, life close to the ground is also inadequate: the first to third floors are very close to the ground.

As shown below: Unfortunately, this situation is almost impossible in general buildings. At the moment, there is a 'high-density area of ​​pollutants' in the middle of high-rise housing in many densely populated areas. It turns out that sometimes the sound will go freely up to the windows of the high-rise. Disadvantages: If there are waste discharge pipes above and below these layers, then these layers will be affected the most. That is between 8-11 layers. Few people are willing to go upstairs and spend ten or twenty minutes in the elevator. In China, higher floors tend to sell more expensive. Generally, no party A has an elevator as a selling point. Disadvantages: 

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