耐火等级为二级时楼板和吊顶的耐火极限应满足()


耐火等级为二级时楼板和吊顶的耐火极限应满足()

A.1.50h,0.25h

B.1.00h,0.25h

C.1.50h,0.15h

正确答案:B


Tag:楼板 等级 极限 时间:2024-06-24 20:59:04