A.平台、栏杆
B.栏杆、梯斜梁
C.梯斜梁、踏步板
D.踏步板、栏杆

A.≤2100mm
B.≤1500mm
C.≤2400mm
D.≤1800mm

A.200mm
B.180mm
C.160mm
D.150mm

A.1.5m
B.1.2m
C.0.9m
D.1.8m

A.800mm
B.1500mm
C.2500mm
D.1000mm

A.250mm
B.100mm
C.50mm
D.300mm

A.装饰、保护
B.节约材料、稳定
C.节约材料、保护
D.抗侧力、保护和美观装饰

A.120mm
B.100mm
C.150mm
D.110mm

A.梁承式、墙悬臂式、扭板式
B.梁承式、梁悬臂式、扭板式
C.墙承式、梁悬臂式、扭板式
D.墙承式、墙悬臂式、扭板式