Why are most slab floors 6 storeys?

Residential buildings are basically such a number of floors, each node is applicable to the specifications are different, the cost of a single floor increases, so it is generally the most cost-effective to achieve the upper limit of this section of the specification, but there are other factors in the high-rise, the most important is that the spacing between the buildings should meet the sunshine, the higher the building, the greater the spacing between the buildings, so the particularly high residential buildings should be comprehensively calculated whether to increase the height or reduce the height to build an additional building. Residential buildings generally will not exceed 32 floors, and then the height will exceed 100m, then the cost rise is very cost-effective, the cultural and sports force also mentioned why the slab floor is only 6 floors, this is mainly the slab floor is generally a multi-unit combination, the width of the face will be very large, built high, in order not to cover the back of the house, the building spacing requirements are very large. Most of the high-rise buildings are point-type, the width of the face is very small, and the front and back can meet the specifications before dislocation with each other (the sunshine on the first floor is not less than 2 hours on a cold day or winter solstice, and the specific regulations are not the same in various places, but it is basically like this), so the high-rise is rarely slab building, unless the back is a big park without building a house, there is no need to consider shading.

In addition, the height of the building is not only to increase the elevator, more than 12 floors to two elevators and a staircase, more than 18 floors to two elevators and two stairs, the shared area will be much larger, and there is a regulation, if the area of a single floor is greater than 650 square meters, the 12th floor also has two stairs, which limits the point of housing generally a maximum of 6 households, generally 6 households area is just about 600, and the public share is also more suitable. <>

Because the 6th floor is the most cost-effective, the floor can also be built, but it is not as cost-effective as the 6th floor. The land area is limited, so under the premise of possibility, such as not sheltering others and not violating the regulations of urban planning, it is definitely the higher the house, the better, so the floor is not as good as the 6-storey one. 11 30 floors, although the additional cost is also high, but the area is much more than 6 floors, high input and high output, it is still cost-effective.

The layer is more embarrassing, and has to put in a high input, but the output is only a little more than the 6 layers, and the area is only 2 or 3 layers more, and the economic benefits brought by it are not worth the additional costs. The specific reasons are, the first is the elevator, the second is the height limit of the seismic fortification, and the secondary may also be the limitation of the bearing capacity of the foundation. <>

1.Article 1 of the national standard GB 50096-2011 "Residential Design Code" for elevators: When one of the following situations occurs, elevators must be set up:

When the height of the entrance floor of a residential or residential building with seven or more floors exceeds 16 m from the outdoor design floor; When the floor of a residential building with six floors or less on the ground floor is used as a shop or other building, and the floor of the entrance floor of the tenant is more than 16 m from the designed outdoor ground level of the building; When the floor of a residential building with six floors or less on the ground floor is used as an overhead floor or storage space, and the floor height of the entrance floor of the household is more than 16 m from the outdoor design ground of the building; When the top floor is a two-storey duplex dwelling, the height of the entrance floor of the top floor is more than 16 m from the outdoor design ground of the building, regardless of the number of floors. The elevator will be installed on the 7th floor, and the money sold on the floor of the house more than the 6th floor may not be enough for the purchase and installation of the elevator, so it is not cost-effective. 2.

Seismic fortification height limit GB 50011-2010 "Code for Seismic Design of Buildings" article: multi-storey masonry houses are basically limited in height to about 6 7 floors, if the height is higher, the lower cost of masonry structure is not applicable, must use a relatively high cost of reinforced concrete structure, the cost will be greatly increased. 3.

The foundation bearing capacity is very weak in a soft soil area like Shanghai, only about 80kpa, commonly known as "old eight tons". Ordinary masonry houses are converted to about 1 ton to ton per square meter per floor, and the total weight of 6 floors is between 6 tons and 9 tons, which is basically about 8 tons, so it is just right. If you build an 8 or 9-storey house that weighs more than 8 tons, you may need additional foundation treatment or pile foundations.

As an economic activity, engineering construction also needs to weigh the pros and cons to find the optimal return on investment. Compared with the 6-storey house, the 8 or 9-story house needs to add elevators, change the structural form to meet the seismic requirements, and may also need to treat the foundation or use the pile foundation, raft foundation and other more expensive foundation forms, and the benefit is only 2 3 floors more, maybe the 2 3 floor area is not enough for these additional expenses, so it is not cost-effective. <>

1.In some places, height limits are imposed. You can only build as tall as you can, and if you go over, it's illegal, like near the airport, or in the southern ......... of Beijing n years ago

2.The upstairs buddy said, to increase the height of the elevator or something This is generally in the old house n years ago, and now there are very few.

3.The most important market demand is determined. The 6th floor is a low building, called a slab building, and there are many kinds of ground floors.

When it is attractive, the property fee is generally half of that of the high-rise, because there is no elevator, and most importantly, the low density! Do you want to live with tens of thousands of people in a mess or a few thousand people in the quiet? Therefore, the house price of the slab building is generally expensive!

There is no elevator below the sixth floor, and the cost is high if there is the seventh floor.

1. The main factors that should be considered in the selection of the floor for buying a house are: the total number of floors of the residential building, the difficulty of escape, the convenience of life, the age composition and health status of the family population, the ventilation and lighting of the residence, the difference in floors and other factors.

2. Low-rise dwellings: refers to one- to three-storey dwellings.

Advantages of floor selection: The lower floors are very convenient for families with children and the elderly. When accidents occur, such as **, collapse, fire and other accidents, the lower floor is the most conducive to escape.

**Low space utilization rate: Developers generally design the space flexibly on this floor, such as basement, garden, garage and other spaces on the first floor, and terraces, sun rooms, patios and other layouts on other floors.

3. Multi-storey dwellings: refers to dwellings with four to six floors.

Advantages of floor selection: good safety performance, convenient for family travel, moderate floor.

4. Medium and high-rise residential buildings: refers to residential buildings with seven to nine floors.

Floor selection advantages: closer to the ground, you can see the people and scenery on the ground, the comfort, convenience and space scale are better than those of the high-rise, and the ventilation, lighting and sunshine can basically meet the needs of life and residence.

5. High-rise residential buildings: refers to residential buildings with 10 floors or more.

Advantages of floor selection: good ventilation and lighting, outside the net window in the room, the scenery of the area is unobstructed, and the view is good. The high-rise floors above 20 floors have good privacy and can not be disturbed by the surrounding environment.

The high-rise has a wide field of vision, the lighting effect is good, the high-rise, the window is open to see the scenery, the distant scenery is in full view, there is a feeling of high-rise Range Rover view, adding a bit of life interest and taste, greatly meeting the needs of people's home landscape, fully embodying the humanized concept of modern housing, bringing a sense of achievement to residents.

6. Top floor and ground floor.

Many buyers are reluctant to choose the top floor and the ground floor, because the top floor is hot in summer, and if the developer does not do thermal insulation, it is even more unsuitable for living. The bottom layer is because it is susceptible to mosquito attacks and has heavy moisture. But the top and ground floors are affordable on the **, and buyers with average family finances can consider these floors.

The most important thing to buy the top floor is to see if the developer has done thermal insulation, and many top floors are bought on the top floor to send the attic, so such a house is still very economical.

When choosing a ground floor, you should first carefully check the moisture-proof design and measures. If the moisture-proof measures are not up to standard, living in this kind of house for a long time will not only make electrical appliances and furniture rusty and moldy, but also people are susceptible to rheumatoid arthritis. Secondly, pay attention to whether all kinds of pipelines are unblocked, the bottom layer is adjacent to various pipelines, especially sewers, if the quality of the pipeline is poor or the design is unreasonable, the pipeline is easy to block, especially the septic tank is not tightly closed, the pipeline is not smooth, and it is often easy to breed mosquitoes and flies and the smell is sky-high.

Thirdly, pay attention to the problem of lighting, because the ground floor is on the ground floor of the building, surrounded by buildings, so its lighting and ventilation are often limited.

7. As a whole, the selection of high-rise residential floors can be selected according to the "rule that residential buildings are better at 1 3 or more than 1 3 and 2 3 below the total number of floors", and the total number of floors is different for different floors.

Doesn't it seem?! Slab floors have the following advantages.

1.The north and south are transparent, which is convenient for lighting and ventilation.

The panel houses are mostly in the north-south direction, with a depth of about 15 meters, which is transparent from north to south, which is convenient for lighting and ventilation, and the house type is square, the plane layout is reasonable, and the scale of each functional space is appropriate. Generally speaking, due to the ample width of the slab floor, it is easier to produce high-quality house design.

2.The slab floor is good.

At present, the small slab building with two households is very popular, precisely because the difference between the advantages and disadvantages of each unit in the whole slab building is very small, and there are several sets of north-facing houses that are difficult to deal with. Due to the small number of residents, the home life is relatively quiet.

3.The management cost is not high.

Generally speaking, the management costs of slab buildings are generally lower than those of towers, and multi-storey slab houses can be without elevators, inverter water supply systems, and daily maintenance costs, including exterior painting, are of course much cheaper than those of towers.

4.Household usage is high.

The occupancy rate of slab units is usually as high as 90% or more, while the occupancy rate of tower units is usually only 75%, because the elevator shafts, waiting halls, and transformer motor rooms in the towers will be distributed to each owner as public areas. Similarly, when buying a house with a floor area of 100 square meters, the usable area of the slab floor is often about 10 square meters higher than that of the tower residents.

Two disadvantages of slab floors.

1.The building density is low and the housing prices are high.

Slab building communities are mostly low-rise and low-density, with low plot ratio, although the living comfort is very strong, but the housing prices will be high, especially in the urban area, where every inch of land is at a premium, the mainstream product is still the tower, and the few non-working class of slab buildings can afford it.

2.The layout of the house is not suitable for transformation.

Slab floors, especially those with brick and concrete structures, play a heavy role in most of the walls indoors and cannot be changed, which is not as strong as the transformability of towers.

You can also go to the ** below to see, the type of real estate.

Slab building: refers to a building whose main orientation building length is more than twice the length of the secondary facing building.

Tower building. Refers to a building with a length-to-height ratio of less than 1, and each orientation of a tower-style building is a long side.

Now these two concepts are not very clear, many buildings similar to towers in appearance, but the internal house type is only available in slab buildings, and the external slab buildings are worse than the towers.

If you just want to estimate the planning area, you can look at it this way, the depth of the six-story slab building is about 13 14 meters, and the length of the building is calculated according to no more than 70 meters of fire protection requirements, so the total construction area of such a 6-story slab building is more than 5,800 square meters, which is almost a relatively large value. If you want to make the house comfortable, the floor area of a building should be less than this value.

The 6th floor of the slab building is a multi-storey residence.

In the case of a traditional multi-storey house, the share is generally 5% to 10%.

In the case of a bungalow with an elevator, it is between 10% and 15%.

It depends on what the structure is, multi-storey, small high-rise, high-rise shared area is different, even if the high-rise design concept is different, the shared area is also different, this depends on the specific design to calculate, but generally multi-storey small high-rise high-rise high-rise shared area. Hope it helps.

The light on the first floor is poor, the ground is easy to get wet, and there will be more small insects and the like, but the built-in patio can be transformed to increase the usable area, and there is no need to climb the stairs to enter and exit the house, which is more labor-saving. The top floor has good light, and you don't have to worry about getting dirty things upstairs when you dry clothes, but the indoor temperature is relatively high when the weather is hot, after all, the sun is shining directly on the roof, and it is more tiring to climb the stairs.

The 1st floor is not good, and the 6th floor is not good.

Oh, but you must choose I will choose the 1st floor, maybe in the future to do a façade room for rent 6th floor is difficult to climb, the main old house The roof is afraid of leakage, and it is very hot in summer (depending on your city).

It should be the best type of high-rise tower facing a good house, first of all, the view is better, and then there is that the tower generally has an elevator, and it is generally inconvenient to go up and down the stairs without an elevator on the 6-storey slab.

Brick-concrete structure and steel-concrete structure are two different house structures, the main difference between the two is that the load-bearing capacity of the house structure is different, the former is based on brick and cement as the load-bearing, and the latter is based on reinforced concrete as the load-bearing, so there is a large difference between the two structures in quality, life and cost Reinforced concrete structure: It is a structure made of concrete with ordinary steel bars, steel mesh, or steel skeletons that are configured with stress. Brick-concrete structure:

It is a building structure composed of brick, stone and block masonry into vertical load-bearing components, and is composed of steel-concrete or prestressed concrete buildings and roofs.