3.1.5 high-rise residential building spacing: 3.1.5.1 high-rise residential building spacing between buildings, strip building according to Table III-1 coefficients calculated to determine the point of building, north-south, shall not be less than the height of the building on the south side of the 1, and shall not be less than the south side of the building width of 1.2 times the minimum spacing of 30 meters; east-west, shall not be less than the height of the higher building 0.4 times, the minimum spacing of 18 meters. 0.4 times of the height of the higher building, and its minimum spacing is 18 meters. 3.1.5.2 The building spacing between high-rise residential buildings and multi-storey and low-rise residential buildings shall be controlled according to the provisions of Article 3.1.5.1 for north-south direction, and the building spacing shall be controlled according to the provisions of Article 3.1.5.1 for multi-storey and low-rise residential buildings on the north side; and for multi-storey and low-rise residential buildings on the south side, the building spacing in the strip type shall be controlled according to the provisions of Table 3-1, but with the minimum spacing of 13 meters, and the spacing of the building in the point type shall be controlled according to the provisions of Article 3.1.3.3. .3.3.3. 3.1.5.3 The spacing of the mountain walls of high-rise residential buildings and high-, multi- and low-rise residential buildings shall be controlled in accordance with the provisions of fire and construction safety. Where the mountain walls all have living room doors or windows, the spacing shall not be less than 13 meters.