What’re operation procedures of the overhead crane(PART II)
D, Do not leave the hung objects suspended in the air when the overhead crane is ceasing condition.
E, Prohibit hanging and staying the objects over the person’s head. Make sure that the hung objects travel along the safety channel.
F, Make the lifting height not too high When the crane is stationary, keep the hook at least the height of one person.
G, During the moving process, the distance between the traveling wheels of the two cranes should be not less than 500mm.
H, While lifting the heavy tonnage of objects, do the test lifting slightly off the ground. Confirm the steady hanging, good braking, then begin to lift slowly.
I, In the lifting process, prohibit operating three mechanism simultaneously ( Crane, Trolley and Winch).
J, If there is sudden power failure in the operation process, shut off the switch handle power. Do not leave the working area wh
en the hung object is suspended or the locks are not separated.
K, In the working process, the declining of hung objects due to sudden faults. Take the urgent measures and put the objects down to the unmanned area.
L, The adequate lighting devices need to be equipped during the night operation.
M, Place the crane in the safety area while doing the maintenances. Cut off the power, set up the fence and hang the signs of “No Thoroughfare”. Prohibit adjustment and maintenance when the crane is traveling.
4，The drivers’ responsibility after working
a, When the hoisting task finished, move the crane to the end of the main beam which is far away from the conductor line, and do not place it in the middle point of the beam. Move the crane to the consistent parking position.
b, The hook should be lifted approaching to the upper limit position, and no spreader or objects being hung.
c, For the electromagnetic chuck crane and grab crane, the grab or sucker should be placed on the ground. Forbid suspending in the air.
d, All the controllers’ handles should be back to zero, pull off the emergency switch circuit and pull down the power cabinet switch.
e, The drive should check the machine again when finishing the operation. The problems occurred in the working process and inspection conditions need to be recorded in the recording sheet especially showing the insecurity factors clearly, then transfer them to the successor.
