A.2.7m,3.2m B.3.0m,5.5m C.3.2m,5.5m D.3.5m,3.2m
跨度18m的鋼筋混凝土屋架,重40KN,安裝到標高+13.50m處的柱頂,停機面標高+0.7m,屋架的綁扎方法如圖所示,計算選擇起重量和起重高度:起重量Q=()起重高度H=()
A.38KN,19.5m B.40KN,18.1m C.42KN,18.1m D.48KN,19.5m
A.2.5m,18m B.3.0m,20m C.3.5m,22m D.5.6m,25m