Code of Maryland Regulations
Title 09 - MARYLAND DEPARTMENT OF LABOR
Subtitle 12 - DIVISION OF LABOR AND INDUSTRY
Chapter 09.12.38 - General Industry Standard for Personnel Platforms Suspended from Cranes, Derricks, and Hoists
09.12.38.07 - Rigging
A. When a wire rope bridle is used to connect the personnel platform to the load line, each bridle leg shall be connected to a master link or shackle in such a manner to ensure that the load is evenly divided among the bridle legs.
B. A hook on an overhaul ball assembly, a lower load block, or other attachment assembly shall be:
(1) Of a type that can be closed and locked, eliminating the hook throat opening; or
(2) A forged steel anchor type shackle with either a forged alloy steel bolt with nut and retaining clip, or a forged alloy steel pin with retaining clip.
C. Wire rope, shackles, rings, master links, and other rigging hardware shall be capable of supporting, without failure, at least five times the maximum intended load applied or transmitted to that component.
D. When rotation resistant rope is used, the slings shall be capable of supporting, without failure, at least ten times the maximum intended load.
E. An eye in a wire rope sling shall be fabricated with thimbles.
F. A bridle and associated rigging for attaching the personnel platform to the hoist line:
(1) Shall be used only for the platform and the necessary employees, their tools, and the materials necessary for them to perform their work; and
(2) When not hoisting personnel, may not be used for any other purpose.