A.120mm厚墻 B.砌體門窗洞口兩側(cè)450mm處 C.獨(dú)立柱 D.寬度為800mm的窗問墻
A.85% B.90% C.95% D.100%
A.一級不宜大于200 B.二級不宜大于250 C.三級不宜大于280 D.四級不宜大于300