Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-155 - Safety standards for construction work › Part L - CRANES, RIGGING, AND PERSONNEL LIFTING › Section 296-155-54100 - Self-erecting tower cranes-General

Current through Register Vol. 24-14, July 15, 2024
(1) All self-erecting tower cranes in use
				must meet the applicable requirements for design, construction, installation,
				testing, maintenance, inspection, and operation as prescribed by the
				manufacturer. For modification requirements see WAC
				296-155-53400(58) and
				(59).
(2) In addition to the requirements in WAC
				296-155-53402(6),
				employees must not be in or under the tower, jib, or rotating portion of the
				crane during erecting, climbing and dismantling operations until the crane is
				secured in a locked position and the competent person in charge indicates it is
				safe to enter this area, unless the manufacturer's instructions direct
				otherwise and only the necessary personnel are permitted in this
				area.
(3) When cranes are erected,
				reconfigured, or dismantled, you must follow written instructions by the
				manufacturer. If circumstances do not permit the normal manufacturer's written
				instructions from being followed, you must follow alternative written
				instructions from the manufacturer or an RPE.
(4) You must perform erection,
				reconfiguration, and dismantling under the supervision of a qualified
				person.
(5) You must carefully
				assess the area in which a crane is to be set up to ensure that it is suitable
				before the crane is taken to site and put into service. The area chosen must be
				of a sufficient size to enable the crane to be maneuvered into position, set
				up, operated and dismantled, with sufficient clearances between the crane and
				surrounding structures, as detailed by application drawings and in the
				manufacturer's operation and instruction manual.
(6) When setting up a crane, you must take
				care to ensure that the crane will not contact or approach overhead hazards
				such as power lines, communications cables or overhead structures.
(7) The assembly/disassembly director must
				address backward stability before slewing self-erecting tower cranes.
(8) Crane supports for individual outrigger
				pads must be level to the manufacturer's specifications or those of a qualified
				person. Supports may be timbers, cribbing, or other structural members to
				distribute the load so as not to exceed the allowable bearing capacity of the
				underlying material.
(9) All load
				bearing foundations, supports, and rail tracks must be constructed or installed
				to support the crane loads and to transmit them to the soil or other support
				medium. In addition to supporting vertical load, foundations and supports, rail
				supports excepted, must be designed to provide a moment resisting overturning
				equal to a minimum of 150% of the maximum crane overturning moment. This
				requirement may be met by means of structural anchors or ballast
				weights.
(10) In addition to the
				requirements in WAC
				296-155-53400(36) and
				(37), a qualified person must ensure that the
				underlying soil is adequate support for the crane with its maximum forces
				recommended by the manufacturer.
(11) You must install cranes required to
				weathervane when out-of-service with clearance for jib and superstructure to
				slew a full 360 degree arc unobstructed without encroaching any power line
				"Danger-Swing/Crush Zone." You must maintain clearances recommended by the
				crane manufacturer between weathervaning cranes, fixed objects and other
				cranes.
(12) When the crane is out
				of operation and a 360 degree rotation is not provided, follow the
				manufacturer's or RPE's written procedures.
(13) You must not install advertising signs
				or similar panels on the crane or tower unless size, design, and positioning
				satisfy the manufacturer's recommendations. In the absence of the
				manufacturer's recommendations, you must obtain an RPE's written approval
				.
(14) Prior to installing a
				self-erecting tower crane on a building or structure you must consult the
				engineer of record to verify that the host structure is capable of safely
				resisting the applied crane forces, if this engineer is not available an RSPE
				must perform this verification.
(15) When cranes are erected and after each
				reconfiguration, before placing the crane in service, all functional motions,
				motion limiting devices, brakes, and you must test indicating devices for
				operation.
(a) The order in which tests of a
				newly erected or reconfigured crane are to be performed is as follows:
(i) Functional motion tests without load.
				Each test must include:
(A) Load hoisting and
				lowering;
(B) Jib elevating and
				lowering, or traversing the trolley;
(C) Slew motion;
(D) Brakes and clutches;
(E) Operational aids and motion limiting
				devices;
(F) Remote control, if
				provided.