Maryland Cranes and Slings: What you need to know

Maryland has adopted workplace safety rules for personnel platforms suspended from cranes, derricks, and hoists in general industry that are absent from the federal rules (COMAR to The state has adopted the federal crane, sling, and derrick regulations for general industry workplaces by reference (COMAR

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Maryland's state plan is administered by the Maryland Occupational Safety and Health (MOSH).


Maryland's personnel platform rules apply to the design, construction, testing, use, and maintenance of personnel platforms, and the hoisting of personnel platforms on the load lines of cranes, derricks, and hoists.

The use of a crane, derrick, or hoist to hoist employees on a personnel platform is prohibited, except when the conventional means of reaching the worksite, such as a personnel hoist, ladder, stairway, aerial lift, elevating work platform, or scaffold is not possible because of structural design or worksite conditions.

Free fall and the use of machines having live booms are prohibited. A jib, boom extension, or similar attachment may not be used to hoist a personnel platform.

Cranes and other hoists must be operated with at least 10 feet of clearance under or near power lines. Distances are greater for power lines rated 50 kilovolts or more.

Hoisting of the personnel platform must be performed in a slow, controlled, cautious manner with no sudden movements of the crane, hoist, or platform.

Load and boom hoist drum brakes, swing brakes, and locking devices, such as pawls or dogs, must be engaged when the occupied personnel platform is in a stationary working position.

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