All of Subpart CC applies to hoisting and rigging in steel erection except 1926.1431(a), and this section adds the following. Cranes used in steel erection must be visually inspected by a competent person before each shift, including watching for deficiencies during operation. The inspection covers at least control mechanisms for maladjustment; control and drive mechanisms for excessive wear and contamination; safety devices (for example load moment indicators where required, anti-two-block devices, boom stops, boom angle indicators and boom kick-out devices); pressurized air, hydraulic and other lines for leaks or deterioration; hooks and latches for cracks, wear, deformation or chemical damage; wire rope reeving against the manufacturer's specifications; electrical apparatus; hydraulic fluid level; tire inflation and condition; ground conditions under and around outriggers; and level position, including after each move and setup. The competent person must decide at once whether a deficiency is a hazard, and if so the equipment comes out of service until corrected. The operator is responsible for operations under their direct control and may stop and refuse loads whenever safety is in doubt. A qualified rigger, meaning a rigger who also meets the qualified person definition, must inspect rigging before each shift under 1926.251. The headache ball, hook or load may not carry personnel; personnel platforms may be hoisted by cranes or derricks only if all of 1926.1431 except paragraph (a) is met. Hook safety latches may not be disabled except where a qualified rigger decides hoisting and placing purlins and single joists is safer that way, or where a site-specific erection plan provides equivalent protection. Suspended load routes must be pre-planned so nobody works directly below a load except those making the initial connection or hooking and unhooking. When anyone works under a suspended load, the materials must be rigged against unintentional displacement, self-closing safety latch hooks or equivalents used, and all loads rigged by a qualified rigger. A multiple lift is allowed only with a multiple lift rigging assembly, no more than five members per lift, only beams and similar structural members, employees trained under 1926.761(c)(1), and a crane whose manufacturer does not prohibit it. Assembly components must be designed with a maximum capacity for the whole assembly and each attachment point, with that capacity certified by a qualified rigger or the manufacturer, based on the manufacturer's specifications and a safety factor of 5 to 1. The total load may not exceed the crane load chart or the rigging rating chart. Members hang from their centers of gravity, kept reasonably level, rigged top down with 7 feet or more between them, set from the bottom up, and controlled load lowering is required any time the load is above the connectors.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.