Overload caused by tower crane accident

a, lifting more than the rated lifting torque, torque limiter damage, demolition, no adjustments or not regularly check failure caused the accident caused by torque limit. Such incidents more, after an accident caused damage as well. As we all know, the uneven quality of tower bridge gantry crane  drivers, many drivers think that the tower crane has certain insurance factor, super point out it does not matter. Knowing tower crane safety factor is to adapt to different working conditions established. An overload does not matter, do not overload the two incidents, accidents are not only feel germination, but as an experience, even as a kind of bragging: "provisions  jib crane  arm end 1t, 2t I'm hanging on nothing." And I wonder if the disaster is quietly coming.
Comments: tower crane load moment limiter is the most critical safety devices should be regularly maintained, adjusted checked.
b, torque limiter malfunction, night lifting, heavy lifting or hoisting rope caught building or unknown object, causing momentary tower gantry crane  tower crane unloaded suddenly overloaded or cause accidents.
Comments: The night blurred vision, easily misjudged; Driver fatigue time jobs, there is often "Early End live, early rest" paralysis and luck.