D half, and a half out half Au balcony, out of their half-bed level projection area calculation construction area, curving side of the area with half of the warring construction area.

• D，半挑半凹阳台，挑出部分按其底板水平投影面积的一半计算建筑面积，凹进部分按其交战面积的一半计算建筑面积。