For the diameters ratios, the stanchions pipe to ball is approx 0.6, top rail to ball is approx 0.5, mid rail to ball is approx 0.4.
球接栏杆的立柱管直径与球直径之比约为0.6；扶手管直径与球直径之比约为0.5；横杆管直径与球直径之比约为0.4。
Personnel working on a scaffold platform with full handrail, mid rail, toe boards and gated access are not required to tie off when working inside the platform area.
在扶手、间隔档、板和进出门齐全的脚手架平台上工作的人员，如果在平台区域内部工作，不需要系牢自己。
"High-speed rail has an important role to play in the United States, particularly for the mid-range distances of 100 to 500 miles," (160 to 800 kilometers) Holguín-Veras says.
“高速铁路将在美国扮演重要的角色，特别是在160km~800km这个中等距离内，”Holguín-Vera声称。
Working from swinging scaffolds and "Tube Lox" scaffold not equipped with mid and top rail.
在摇晃的鹰架和管架上作业，且在中部和上部未安装护栏。
Working from swinging scaffolds and "Tube Lox" scaffold not equipped with mid and top rail.
在摇晃的鹰架和管架上作业，且在中部和上部未安装护栏。
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