How to calculate the distance between buildings?

It depends on the sunshine interval or the building fire prevention interval. If it is a building fire protection distance, it should be calculated according to the nearest distance from the external wall of the adjacent building. If there are protruding combustion parts on the external wall, the calculation should start from the edge of the protruding part. If it is sunshine spacing, it can be calculated according to the part of the living space of a building after the previous building is blocked.

Two parallel buildings A and B in the south and north are in front of B, and the vertical distance X from the bottom window sill of B's living space to the top of A's parapet is obtained. If two buildings are parallel but not due south and north, the deviation angle of 0- 15 degrees is multiplied by the deviation angle of X 1, 15-30.

Norms and standards:

According to the national regulations (design code), the sunshine time from winter solstice is not less than 1 hour (bottom window of residence). The distance is the height from the outdoor terrace of the building to the eaves of the building /tan(a)a—— the solar altitude angle at noon from winter to Sunday. It can also be calculated by the ratio of building height to building spacing = 1: 1.2. ?

Residential layout, usually to meet the sunshine requirements as the main basis for determining the spacing between buildings. The Code for Fire Protection Design of Buildings in People's Republic of China (PRC) stipulates that the left-right spacing between multi-storey buildings should be at least 6m, the left-right spacing between multi-storey buildings and high-rise buildings should be 9m and the left-right spacing between high-rise buildings should be 13m. This is mandatory.

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