10
CurrentAngle between runners of union purchase rig
10 Angle between runners of union purchase rig
If loading or unloading by a derrick in union purchase rig, the angle included by the ends of runners at the hook assembly measured in the plane of the runners must not be more than 120° or a lesser angle in accordance with the rigging plan, drawings or instructions for the use of the derrick.
Division 2 Cranes
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