1.养成良好的吊装习惯，在起吊工作前计划好如何吊挂、起吊及卸载。

1. develop good hoisting habits and plan how to hang, lift and unload before lifting.

2.做准备：确定被吊物的重量及其重心，仔细阅读附带文件，标记好起吊点及重量数据。只有确定重心后才能将吊钩挂在恰当的位置。

2. prepare: determine the weight of the hanging object and its center of gravity, read the attached document carefully, mark the lifting point and weight data. Only when the center of gravity has been determined can the hook be hung in place.

3.起重机操作人员要被告知被吊物的重量。

3. the crane operator shall be informed of the weight of the suspended object.

4.起重机吊钩要在被吊物重心上方垂直悬挂。

4. the crane hook shall be hung vertically above the center of gravity of the suspended object.

5.起吊起重物件既要避免损伤起重物件，又要防止对索具本身的损害。为避免旋转或掉落，应遵守以下条件：

5. lifting heavy pieces, both to avoid damage to lifting objects, but also to prevent damage to the rigging itself. The following conditions shall be observed in order to avoid rotation or fall:

a)单腿索具，起吊点应该垂直位于起重物件重心正上方。

(a) single leg rigging, the lifting point shall be perpendicular to the center of gravity of the lifting object.

b)如果是双腿索具，吊挂点应该位于起重物件两边，起吊点在重心上方。

(b) if it is a two leg rigging, the suspension point shall be on either side of the lifting object, with the lifting point above the center of gravity.

c)如果是三腿和四腿索具，吊挂点应该均匀的位于起重物件重心水平上，且在被吊物重心上方。必须注意起吊角β（位于垂线与吊腿之间）：起吊角越大，提升能力越小。超过60度的起吊角是绝对不允许的。

(c) if it is a three leg and four leg rigging, the suspension point shall be evenly located at the center of gravity of the lifting object, and above the center of gravity of the suspended object. Attention must be paid to the lifting angle, between the vertical and the leg): the greater the lifting angle, the smaller the lifting capacity. Lifting angles of more than 60 degrees are absolutely not allowed.