Lifting rope and anchor

1. materials lifting equipment broken wire with more than 10% in one pitch, and when the rope surface corrosion or wear up to 40% and there are dead corner, structural deformation cord extrusion, etc., should be scrapped to stop using. Broken wire or wear less than a proportional reduction scrapped standard carrying capacity. Checkout wire rope safety factor should be lifting, human driven, K = 4.5; mechanically driven, K = 5 ~ 6.
2. derrick pulleys and ground guide pulley selection, should be adapted to the rope diameter, the diameter ratio of not less than 15, each group pulleys must be firmly fixed rope pulley flange damage and other defects occur should be replaced.
3. wind cable rope wire rope electric hoist wire rope should be used, the safety factor K = 3.5, must also comply with the requirements of the construction program, wind cable rope should be anchored securely connected.
The anchor is buried calculated approach should determine the location and depth of the anchor should be consistent with the requirements of the construction program and a practical point of gin pole when operating. When moving derrick, also must go through a formal design calculations anchor, not allowed to freely tied to the poles, trees and structures.
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