A.0.25~0.60% B.0.25~0.8% C.0.5~0.8% D.0.35~0.6%
A.fcu,k=25Mpa B.fcu,k ≤30Mpa C.fcu,k <28Mpa D.fcu,k <30Mpa
A.低碳鋼 B.松木 C.普通混凝土 D.都一樣