Wash. Admin. Code § 296-79-170 - Requirements for crawler and truck cranes

(1) Boom length indicated. The length must be plainly marked on each boom section of a mobile crane having a sectioned boom.
(2) Radius or boom angle indicator. A radius or boom angle indicator must be installed where it is readily visible to the operator's normal operating position on all cranes having a movable working boom.
(3) Safety device for light fixtures. Any light fixtures attached to a crane boom or machinery house must have a safety strap or other device attached which will prevent the fixture from falling.
(4) Boom stops. Boom stops must be:
(a) Installed to govern the upward travel of the boom to a safe limit; and
(b) Of adequate strength to prevent the boom from traveling past the vertical position.
(5) Controls marked. Crane operating controls must be marked or an explanation of the controls' functions must be posted in full view of the operator.
(6) Locking hydraulic outriggers. Hydraulic outriggers must be:
(a) Equipped with a pilot operated check valve; or
(b) Installed with a mechanical lock which will prevent outriggers from retracting in case of failure of the hydraulic system.
(7) Top of boom painted. The top six feet of the boom or jib must be painted bright yellow or other bright contrasting color if the boom is yellow.
(8) Warning devices. All cranes must be equipped with a suitable warning device such as a horn or whistle.
(9) Hook safety device. All hooks must be equipped with a safety device or other effective means must be used to prevent accidental unhooking of the load.
(10) Counterweight limited. The amount of crane counterweight must not exceed the maximum amount specified by the crane manufacturer.
(11) Use proper size wire rope for sheaves. The size and diameter of sheaves and wire rope must be compatible and follow the recommendations by the manufacturer, published by the Wire Rope Institute or other acceptable engineering practices.
(12) Loading or unloading gear. Unloading gear such as grapples, tongs, and buckets, must not be left suspended when not in use or whenever the machine is unattended.
(13) No one under load. Personnel must not position themselves under crane loads and such loads must not be carried over workers.
(14) Operating clearance from stationary objects. Where the area is accessible to workers:
(a) A distance of 30 inches must be maintained between the outermost part of a revolving crane and any stationary object within the swing radius of the crane; or
(b) The hazardous area must be temporarily guarded or barricaded.
(15) See WAC 296-24-960 when working around energized lines.
(16) Operators must avoid contacting overhead obstructions which may damage the boom or adversely affect stability. In instances where the operator may have difficulty in observing clearances, a signal person must be stationed where they can observe clearances and signal the operator.
(17) Safe travel across thoroughfares or railroad tracks.
(a) When moving cranes, shovels or similar types of equipment across thoroughfares or railroad tracks and the operator does not have a clear vision of approaching traffic, a flag person must be used.
(b) The flag person must be stationed where the equipment operator can be signaled and other traffic can be controlled.
(18) Only a designated member of the crew may give signals to the crane operator. Exception: Anyone may give an emergency stop signal.
(19) Standard hand signals. When using visual signals, standard hand signals as illustrated below, must be used for directing crane operators.


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Wash. Admin. Code § 296-79-170
Amended by WSR 17-16-132, Filed 8/1/2017, effective 9/1/2017

Statutory Authority: RCW 49.17.010, 49.17.040 and 49.17.050. 99-16-083, § 296-79-170, filed 8/3/99, effective 11/3/99. Statutory Authority: RCW 49.17.040, 49.17.050 and 49.17.240. 81-13-053 (Order 81-9), § 296-79-170, filed 6/17/81. Statutory Authority: RCW 49.17.040, 49.17.240, and chapters 43.22 and 42.30 RCW. 81-03-007 (Order 80-31), § 296-79-170, filed 1/8/81; Order 74-24, § 296-79-170, filed 5/6/74; Order 70-6, § 296-79-170, filed 7/10/70, effective 8/10/70.

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