减速机的重量已在铭牌上标出，要用起吊重量足够的设备进行吊装。

Weight of the gear reducer is shown on the nameplate. The lifting equipment must be capable of lifting the gear reducer.

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铜绿山矿某三铰拱屋架单轨吊梁结构体系，因技术改造增加设备简体重量，随意用滑轮组起吊检修，导致拱架上弦全截面贯通式开裂的结构事故。

Then the structural accident of total section drive-through type crack is caused in arch frame top chord, which is induced by hoisting and detection using pulley arbitrarily.

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竖杆式拱架支承结构起顶重量大，对吊车的起吊能力要求高，施工难度大。

The usual arch supporting structure requires high-capacity cranes to erect, and complicate constructing methods hard to meet.

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