(1) According to the weight and thickness of the lifting object, the correct choice of the applicable specifications, clamping the wrong clamping safety thickness for the larger opening of more than 1/4, the safety of the lifting load should be more than 20% of the larger permissible load.
　　(2)Prohibit to do any kind of turning over and lifting, the angle of the steel plate on both sides of the wire rope is not more than 60 °, the same side of the wire rope angle is prohibited to be more than 30 ° (see Figure 2-7-3).
　　(3) Before lifting the steel plate must be inserted to the end, such as found not inserted in place should immediately stop lifting, to be adjusted.
　　(4) clamp in use, is strictly prohibited by the impact or collision.
　　(5) Prohibit the installation of two or more than two hanging errors on the same sling, prohibit heavy pulling and slanting.
　　(6)It is forbidden to lift steel plates and objects sideways or unilaterally.
　　(7) It is prohibited to lift objects connected with fixed objects.