.05 Instruments and Components.

A. A crane with variable angle booms shall be equipped with a boom angle indicator, readily visible to the operator.

B. A crane with telescoping booms shall be marked or equipped with a device to indicate clearly to the operator at all times the boom's extended length.

C. Except for an electric crane, the load line hoist drum shall have a system or device on the power train, other than the load hoist brake, that:

(1) Regulates the lowering rate of speed of the hoist mechanism; and

(2) Prevents free fall.

D. An electrical crane shall meet the requirements of 29 CFR § 1910.179(f)(1), (2), and (3)(ii).

E. Damage Prevention Device. A crane and hoist shall be equipped with a:

(1) Positive acting device, such as anti-two block, which prevents contact between the load block or overhaul ball and the boom tip; or

(2) System, such as a two block damage prevention feature, which deactivates the hoisting action before damage may occur to the load block, overhaul ball, or boom tip.