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 296-155-54300 - Derricks-General

Current through Register Vol. 24-14, July 15, 2024
(1) This section
				contains supplemental requirements for derricks, whether temporarily or
				permanently mounted; all sections of this part apply to derricks unless
				specified otherwise. A derrick is powered equipment consisting of a mast or
				equivalent member that is held at or near the end by guys or braces, with or
				without a boom, and its hoisting mechanism. The mast/equivalent member and/or
				the load is moved by the hoisting mechanism (typically base-mounted) and
				operating ropes. Derricks include: A-frame, basket, breast, Chicago boom, gin
				pole (except gin poles used for erection of communication towers), guy,
				shearleg, stiffleg, and variations of such equipment.
(2)
Derricks.
All derricks in
				use must meet the applicable requirements for design, construction,
				installation, inspection, testing, maintenance, and operation as prescribed in
				American National Standard Institute B30.6-2010, Safety Standard for Derricks.
				It is not the intent of this rule to require retrofitting of existing derricks.
				However, when an item is being modified, its performance needs to be reviewed
				by a qualified person and compared to the applicable sections of this rule. For
				modification requirements see WAC
				296-155-53400(58) and
				(59). For derricks manufactured prior to the
				effective date of this rule the design and construction criteria must meet at a
				minimum, ASME B30.6-1990.
(3)
				Derricks must be constructed to meet all stresses imposed on members and
				components when installed and operated in accordance with the
				manufacturer's/builder's procedures and within its rated capacity.
(4) You must follow the manufacturer's
				recommendations when installing, erecting, operating, maintenance and
				dismantling derricks. If the manufacturer's recommendations are not available,
				follow the requirements in ASME B30.6-2010.
(5) When derricks are erected/dismantled,
				written instructions by the manufacturer or qualified person and a list of the
				weights of each subassembly to be erected/dismantled must be at the
				site.
(6) You must establish
				procedures before beginning derrick erection/dismantling work to implement the
				instructions and adapt them to the particular needs of the site.
(7) A qualified person must supervise the
				erection and dismantling of the derrick.
(8) Derricks and their crane assembly
				parts/components must be inspected by an accredited certifier, prior to
				assembly and following erection of the derrick before placing the crane in
				service (see WAC
				296-155-53212
				). Only inspected and preapproved components are allowed to be used in the
				assembly of a derrick.
(9) Prior to
				erecting a derrick on a nonstandard base/structural support, you must ensure
				that the engineering configuration of this base/structural support has been
				reviewed and acknowledged as acceptable by an independent registered
				professional structural engineer (RPSE), licensed under chapter 18.43
				RCW.
(10) An RPSE must certify that
				the derrick foundation, structural supports and underlying soil provide
				adequate support for the derrick with its applied torsional and overturning
				moments and the horizontal and vertical forces.
(11) Derricks must be attached to
				bases/structural supports in compliance with the manufacturer's or an RPSE's
				instructions.
(12) Prior to
				installing a derrick that will be attached to an existing building, new
				construction, or structure, an RPSE must certify that the structural
				attachments to the building are designed to withstand the torsional and
				overturning moments and the horizontal and vertical forces created by the
				derrick to be installed.
(13) You
				must consult the engineer of record to verify that the host structure is
				capable of safely resisting the applied derrick forces, if this engineer is not
				available an RPSE must perform this verification.
(14) Derrick superstructures and machine deck
				(counterweight jib/counter-jibs) must be arranged to receive counterweights,
				made in accordance with the manufacturer's specifications for the specified jib
				or boom length, and to hold them in position. You must provide means to guard
				against shifting or dislodgement during derrick operation. Manufacturer's
				specified counterweight weights are not to be exceeded.
(15) For derricks utilizing ballast, bases
				must include provisions to support and position the ballast. You must provide
				means to guard against shifting or dislodgement of ballast during derrick
				operation.
(16) All electrical
				equipment must be properly grounded and protection must be provided against
				lightning per the manufacturer's recommendations or if not available, a
				registered professional electrical engineer.
(17) Each electrically powered derrick must
				have a main disconnect switch at or near the initial base of the derrick. This
				switch must have provisions for locking in the "off" position.
(18) You must locate or guard electrical
				equipment so that live parts are not exposed to inadvertent contact by
				personnel and equipment under normal operating conditions.
(19) You must protect electrical equipment
				from dirt, grease, oil, and moisture. Fixtures, wiring, and connections exposed
				to the weather must be of weather resistant type.
(20) Wiring must conform to the provisions of
				ANSI/ NFPA 70 for temporary wiring. Motors, controls, switches, and other
				electrical equipment must meet applicable requirements of ANSI/NFPA 70. Hoists,
				slewing, trolley, and travel controllers must conform to ISO 7752-1,
				2010.
(21) You must make provisions
				to guard against reversing of each motor due to reversed phase
				connections.
(22) Electrical
				circuits between the fixed and rotating portions of the derrick must pass
				through a slip ring assembly that will permit continuous rotation of the upper
				derrick structure in either direction, unless other means are provided to
				prevent damage to the electrical conductors.
(23) Individual overload protection must be
				provided for each motor.
(24) You
				must protect employees required to perform duties on the boom/jib of derricks
				against falling in accordance with chapter 296-880 WAC, Unified safety
				standards for fall protection.
(25)
				You must not install advertising signs or similar panels on the derrick 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.
(26) For night
				operations, lighting must be adequate to illuminate the working radius while
				not interfering with the operator's vision.
(27) All welding procedures and welding
				operator qualifications for use in repair or alteration of load sustaining
				members must be in accordance with ANSI/AWS D14.3 or ANSI/AWS D1.1. Where
				special steels or other materials are used, the manufacturer or a qualified
				person must provide welding procedure instructions. The type of metal used for
				load sustaining members must be identified by the manufacturer. In the absence
				of the manufacturer you must use an RPSE.
Statutory Authority:
					 RCW
					 49.17.010,
					 49.17.040,
					 49.17.050,
					 49.17.440,
					 49.17.060, and 29 C.F.R. 1926,
					 Subpart CC. 12-01-086, § 296-155-54300, filed 12/20/11, effective
					 2/1/12.