WAC 296-155-54320
Derricks -- Operations. (1) The
operator must not engage in any practice that diverts their
attention while actually engaged in operating the derrick.
(2) The operator must do the following before leaving the
derrick unattended:
(a) Set down any attached load.
(b) Disengage clutches.
(c) Put the handles of controls in the "off" position.
(d) Open main switch or stop the engine.
(e) Engage the manual locking devices in the absence of
automatic holding equipment.
Note:
Additional information relating to cranes being unattended is located in WAC 296-155-53400(52) of this part.
(3) If power fails during operation, the derrick hoist
operator must:
(a) If practical, the suspended load must be landed under
brake control, according to the manufacturer's procedures or
an RPE;
(b) Set all brakes or locking devices;
(c) Move all clutch or other power controls to the "off"
position.
(4) The operator must be familiar with the derrick and
its proper care. If adjustments or repairs are necessary, the
operator must report the condition to the competent person,
and must also notify the next operator.
(5) The operator must test all controls at the start of a
new shift. If any controls do not operate properly, they must
be adjusted or repaired before operations are begun.
(6) The load must not be lowered below the point where
less than two full wraps of rope remain on the drum.
(7) When slewing a derrick, sudden starts and stops must
be avoided. Slewing speed must be such that the load does not
swing out beyond the radius at which it can be controlled. A
tag or restraint line must be used when slewing of the load is
hazardous.
(8) Use of winch heads.
(a) Ropes must not be handled on a winch head without the
knowledge of the operator.
(b) While a winch head is being used, the operator must
be within reach of the power unit control lever.
(9) Securing the derrick.
(a) When the boom is being held in a fixed position,
dogs, pawls, or other positive holding mechanisms on the boom
hoist must be engaged.
(b) When taken out of service for thirty days or more,
the derrick must be secured according to the manufacturer's
recommendations. In the absence of the manufacturer's
recommendations an RPE must be used.