Supplements the subpart for temporarily or permanently mounted derricks (a mast, with or without a boom, held near its end by guys or braces, moved by a hoisting mechanism and ropes, such as stiffleg, guy, shearleg, A-frame, breast, basket and Chicago boom types and gin poles other than communication tower gin poles). 1926.1417 applies except its cab accessibility paragraph. Load charts must show rated capacity across boom angles or radii, component lengths, required hoist reeving parts, and rope size and construction (on the chart or in the manual); for permanent fixed installations the chart is posted where operating personnel can see it, and for other installations it is readily available on site. Construction: members built to withstand imposed stresses within rated capacity; load-sustaining welds to AWS D1.1/D1.1M:2002 or ANSI/AWS D14.3-94. Guy derricks need at least 6 equally spaced guys unless a qualified person or the manufacturer approves variation and revises capacity, and may not be used without guy number, spacing and rope data (plus initial sag or tension and anchor tension for derricks made after December 18, 1970) from the maker or, failing that, a qualified person; mast base and cap requirements apply. Stiffleg derricks need at least two stifflegs, loads within chart range, a free-rotating base and secured top connection. Gin pole guys must keep the pole stable in boomed and vertical positions or the derrick is not used unstable. Chicago boom fittings must allow swinging, attach to the host structure and resist lift-out. Anchoring uses manufacturer or qualified person load data; guy and stiffleg bases and anchorages must resist maximum forces. Hoists: suitable and anchored; base-mounted drum hoists meet listed ASME B30.7-2001 sections; new hoists load tested to between 110% and 125% of rated capacity unless the maker recommends otherwise (maker's testing counts); repaired or modified hoists evaluated by a qualified person for a load test, with a competent person passing any test. Operational aids: 1926.1416 applies except boom hoist limiter, boom angle indicator and load weighing; without a boom angle indicator, caution and stop marks on the boom hoist cable or an electronic warning or limiting device are required; derricks built over a year after November 8, 2010 and rated over 6,000 pounds need a load weighing, moment or rated capacity device, repaired within 30 days (or within 7 days of receiving parts where they were documented as ordered within 7 days and arrived too late for the 30-day limit). New or reinstalled derricks: anchorages approved by a qualified person (rock or hairpin anchorages tested if needed), a no-load functional test by a competent person through full hook, boom and swing travel and device actuation, and a load test at 100% to 110% of rated capacity (never below the maximum anticipated load) passed by a competent person, documented with date, results and tester name and kept until re-test or dismantling; repaired or modified derricks evaluated for re-testing. On power failure the operator sets brakes and moves controls to off. Winch head ropes only with the operator's knowledge, operator within reach of the control lever. Boom held by dogs or pawls, and secured by one of four listed methods if out of service 30 days or more. Jumping is supervised by the A/D director and operations by a competent person. Inspections add daily guy tension checks and annual gudgeon pin and foundation checks. Operators must be trained on the derrick they will run; 1926.1427 does not apply.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.