23 CAR § 400-207. Hoisting of platforms

(a) Application. This section applies to movable platforms that are raised and lowered from the structure. (b) Hoisting of the platform shall be performed in a slow, controlled, cautious manner with no sudden movements of the platform. (c) Load and boom hoist drum brakes, swing brakes, and locking devices such as pawls or dogs shall be engaged when the occupied platform is in a stationary working position. (d)(1) Portable towers shall be uniformly level within one percent (1%) of level grade and located on firm footing. (2) Portable towers shall be equipped with outriggers. (3) The outriggers shall be fully deployed following manufacturer's specifications when hoisting. (e) The total weight of the loaded platform and related rigging shall not exceed fifty percent (50%) of the rated load capacity for the radius and configuration of the portable tower. (f)(1) The use of a machine having a boom in which lowering is controlled by a brake without aid from other devices which slow the lowering speed is prohibited. (2) Note. This type of prohibited boom is commonly called a live boom. (g) Portable towers with variable angle booms shall be equipped with a boom angle indicator, readily visible to the operator. (h) A positive-acting device, such as an anti-two-blocking device, shall be used to prevent contact between the load block or overhaul ball and the boom tip, or a system shall be used to deactivate the hoisting action before damage occurs in the event of a two-blocking situation. (i)(1) The load-line hoist drum shall have a controlled-load lowering system or device on the power train, other than the load hoist brake, which regulates the lowering rate of speed of the hoist mechanism. (2) Free fall is prohibited.