A.3-8mm B.5-10mm C.8-15mm D.10-15mm
A.門、窗洞口側邊120mm范圍內 B.后補的施工洞口和經修補的砌體 C.完整墻體中部 D.獨立磚柱
A.1%-2% B.2%-3% C.3%-4% D.4%-5%