Applies to every assembly and disassembly job. Supervision: the work must be directed by an A/D director who is both a competent and a qualified person, or a competent person supported by at least one qualified person; a lone worker doing A/D must meet both criteria and is the A/D director. Procedures must be understood by the A/D director and reviewed right before work starts, unless the director already knows them and has used them on equipment of identical type and configuration. Before work begins, and again when a crew member changes tasks or new people join, the A/D director must make sure crew members understand their tasks, the hazards of those tasks and the hazardous positions to avoid. A crew member heading out of the operator's view to a spot in, on or under the machine, or close to the machine or load, where movement could injure them must tell the operator, and the operator, knowing this, must not move anything until told through a pre-arranged communication system that the person is safe. While pins are being pulled, nobody may stand beneath the boom, jib or other components unless the employer shows site constraints require it, in which case the A/D director implements procedures minimising the risk of unintended movement and the duration and extent of exposure (Appendix B gives an example). Rated capacity limits of the equipment, components, rigging, lifting lugs and accessories must not be exceeded at any stage. The A/D director must address listed hazards: site and ground bearing conditions; blocking size, amount, condition and stacking; blocking placement under lattice booms; verifying assist crane loads per 1926.1417(o)(3) before starting; boom and jib pick points; centre of gravity (identified where the stability method needs it, otherwise measures against inaccurate identification); stability when pins come out; snagging of ropes and pendants on pins; counterweight struck-by hazards; boom hoist brake testing before each reliance, with a pawl, locking device, blocking or assist crane if the brake is insufficient; backward stability; and wind and weather. Other duties: the maker's cantilevered boom limits, or where none exist a written limit set by a registered professional engineer; component weights readily available; component selection and configuration per manufacturer specifications (or, where those are unavailable, an RPE's written approval), or per 1926.1434 modifications, followed by a post-assembly inspection under 1926.1412(c); reusable shipping pins and straps removed and stowed against falling; no jib attached during pile driving; outriggers and stabilizers fully extended or deployed per the load chart, set to take weight off the wheels (except stabilizers and locomotive cranes), floats attached, visible to the operator or a signal person while being set, and blocking placed only under the float or beam end; locomotive cranes following manufacturer procedures. Rigging for A/D must be done by a qualified rigger, synthetic slings protected from edges and compression and used per the sling maker's instructions, in addition to 1926.251.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.