Why does the residence OF DOMESTIC 7 FLOORS above just install elevator?

Now most of the new buildings have elevators, elevators are no longer enough to become the advantage of a residential community, but there are still many people in the lack of elevators and feel unfair, these people live in the building has the same characteristics, that is, less than seven floors.

Why not design all buildings with elevators?

In fact, when Chinese designers do architectural design, the designers generally do according to the permissible limit of the norms unless Party A requests. Such advantage is that under the condition of meeting the specification, Z can reduce Party A's cost to a large extent. The number of residential floor setting is often stuck to the allowable limit of the code to do. In this way, the floor area of the building can be reduced, and the excavation area of the foundation pit/the number of piles can be reduced accordingly. Expand the area of green or square; Enlarge floor spacing; Optimize sunlight conditions, etc.

The advantages and disadvantages of buying a house

"General Rules of Civil Building Design" according to the number of floors for residential classification: one to three floors for low-rise residential, four to six floors for multi-storey residential, seven to nine floors for high-rise residential, ten and more than ten floors for high-rise residential. Almost all the specifications for residential building types are based on this division standard.

The provisions on the floor are too numerous to enumerate, and the real cost of construction and installation, room rate these indicators related to the interests of all parties have a greater impact, mainly the elevator and stairwell, so whether to install the elevator has become a serious problem:

1. The elevator

The "Residential Design Code" stipulates that the height of the floor of seven or more floors or the entrance floor of households from the outdoor design ground is more than 16m; For a residence with twelve stories or more, each building shall be equipped with no less than two elevators, one of which shall be equipped with an elevator capable of accommodating stretchers.

"High-rise civil building design fire prevention code" REGULATION 12 and 12 or more family type residence and corridor type residence should set up fire elevator, so, do not want to set up elevator, can do 6, want to set up elevator can only do 11.The elevator increases the cost and affects the room rate. Generally, no party has the elevator as a selling point.

2. The stair

The "Code for Fire Prevention Design of high-rise Civil Buildings" stipulates that no closed stairwells can be set up in units of eleven floors and below, but the door opening to the stairwells should be class B fire doors; Enclosed stairwells should be provided for units on the 12th and 18th floors; Units with floors 19 and above should be equipped with smoke-proof stairwells. Enclosed stairwells shall be provided for corridor dwellings with floors 11 and below; Balconies over 11 floors should be equipped with smoke-proof stairwells.

Therefore, do not want to set up closed stairwell can do 11 layers, do not want to set up smoke prevention stairwell can do 18 layers. Smoke prevention stairwell also needs to set up smoke prevention room and positive pressure air supply pipeline, which need to occupy the public area to reduce the rate of housing, in China, the people have no public area is also part of my home; The increased level of security for me is also a protection of this kind of concept.

According to the Residential Building Code, the maximum number of floors is 3 for a four-level fireproof residential building, 9 for a three-level fireproof residential building, and 18 for a second-level fireproof residential building. The fire resistance level is increased step by step, and the requirements for components are also increased accordingly. As for the 33 floors, only the total height of the building is not more than 100m to do. More than 100m is a super high-rise building, not to mention the regulations for each major all kinds of strict, only to set the asylum layer, enough for all interested parties to drink a pot, who can bear the common area.