Double girder overhead crane rules

Double girder overhead bridge crane  rules
1 before work
a. On the brakes, hook, wire rope and safety devices and other components according to the requirements of the check card check and found abnormal, should be thoroughly removed.
b. Operator must confirm to go Taiwan or track when no one can close the main power supply. When the power supply circuit breaker locking or signs, the persons concerned should be removed only after the original closing the main power supply.
(2) work
a. First class lifting weights (or the load reaches the maximum weight) should be hanging height of 0.5 meters from the ground after the heavy down again, check the brake performance, reliable after confirmation, then normal operation.
b. Operator in the job, should be required for the following operations-ringing alarm.
① lifting, landing weight; starting big car when traveling.  gantry crane 
  Gantry crane
② crane when traveling in clear view through to continuous-ringing alarm;
③ crane traveling close to the cross inside another crane.
④ when lifting heavy objects close to the staff.
c. Operation should be run under a unified command signals.
d. Work in a power outage, should all of the control handle to the "zero" position should be checked prior to re-work the crane movement is normal.
e. Large  hoist crane , trolley during normal operation, is strictly prohibited to open anti-vehicle parking brake; transform large trolley movement direction, the handle must be placed in the "zero" position, the agency completely stopped, can the reverse drive.
f. There are two hooks of the crane, in the main, auxiliary hook for hook height with time and the two are similar, the main and auxiliary hook must work alone, so two hooks collision.
g. Two allowed two hook crane hook lifting two objects simultaneously; does not work in the case adjust the brake lifting mechanism.
h. Are not allowed to use extreme position limiter parking is prohibited in the case of a load lifting mechanism to adjust the brake.
i. Strictly enforce the "do not hang ten" system:
① command signal is unknown or arbitrary command does not hang;
② does not exceed the rated lifting weight lifting;
③ spreaders unreasonable or not the object is not strong tie to hang suspended;
④ hanging objects floating on someone or put other items are not hanging;
⑤ brake failure or other safety device brake not hanging;
⑥ hanging heavy traffic processed directly without hanging;
⑦ pull Xiegua not hanging crooked;
⑧ explosive objects are not hanging;
⑨ buried object does not pull hanging;
⑩ angular blocks mouth objects, not pad it really hanging;
j. If abnormal, immediately shut down, check the reason and immediately removed.
3 work
a. The hook rises to a certain height, carts, trolley stops at the specified location, the controller handle in the "zero" position; Pull off the protective box switch handle, cut off the power.
b. Routine maintenance.
c. Do shift work.