Sling Angles: Two Legged Sling - Wire Rope, Chain, and Synthetics Vertical share of load on slings are equal if center of gravity is in the middle. Horizontal Sling Angle Horizontal Sling Angle (A) Degree Load Angle Factor = L/H 90 1.000 60 1.155 50 1.305 45 [...]
Wire Rope Slings (ASME B30.9) A wire rope sling shall be removed from service if conditions such as the following are present: Missing or illegible sling identification. Broken Wires: *For strand-laid and single-part slings, 10 randomly distributed broken wires in one rope lay, or 5 broken wires in one strand in one rope lay. *For [...]
Employers must use qualified riggers during hoisting activities for assembly and disassembly work (1926.1404(r)(1)). Additionally, qualified riggers are required whenever workers are within the fall zone and hooking, unhooking, or guiding a load, or doing the initial connection of a load to a component or structure (1926.1425(c)).
A qualified rigger is a rigger who meets the criteria for a qualified person. Employers must determine whether a person is qualified to perform specific rigging tasks. Each qualified rigger may have different credentials or experience. A qualified rigger is a person that: possesses a recognized degree, certificate, or professional standing, or has extensive knowledge, [...]