Under what circumstances are winches used and under what circumstances tower cranes are used?
1, this depends on the specific construction organization design, the general height of less than 20 meters, all with the hoist.2, the framework of the structure, four, 18 meters, construction area, if large, with tower cranes, of course, labor-saving, time-saving and rapid progress, if the construction side agrees, it is best to use tower cranes.3, artificial wages are too high, the project is big, with the winch is not worthwhile, progress can not catch up, workers are also big grievances. The track type tower crane is usually used in shipyard or fixed freight yard.
Tower crane hoisting hoist how to brake, driving forklift personnel must undergo professional training, through non emergency situations, can not turn sharp and slam the brakes. 3.3.9 in the chute when running on empty 1)
First of all, what you say should be a derrick or a Longmen frame. In any case, the derrick or tower crane should first meet the construction requirements, then the economy and safety requirements. To meet the construction requirements, it is much better to choose the derrick, of course, economically and safely. Derrick is a simple nonstandard equipment. It is easy to install, use and disassemble. It has low running cost and less safety risk than tower crane. The derrick is suitable for construction under 30 meters or less, especially for multi storied buildings and single pieces. The volume and quality are not more than 2 tons.
Construction technology is not too complex, and components can be zero, the use of winches (such as brick structure). Large components can not be separated, the use of tower cranes (such as cement cast-in-place shear wall structure must use large-scale steel mold).
