A. 锥形基础的边缘高度不宜小于300mm
B. 扩展基础底板受力钢筋的最小直径不宜小于10mm，间距不宜大于200mm
C. 墙下条形基础的宽度大于或等于2.5m时，底板受力钢筋的长度可取宽度的0.9倍
D. 垫层混凝土强度等级应为C10；混凝土强度等级不应低于C15
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