A.10% B.15% C.20% D.30%
A.1~2‰ B.1~3‰ C.1~5‰
A.國外進(jìn)口鋼材 B.鋼筋混進(jìn) C.對(duì)質(zhì)量有疑義的鋼材 D.板厚等于或大于40mm,且設(shè)計(jì)有Z向性能要求的厚板