Has a high tower of tower cranes, crane installed at the top of the Tower, have higher effective height and larger radius, the tower crane arm can turn 360. Consequently, tower cranes and construction lifting and vertical transportation to be widely applied. Types of tower cranes, according to whether the running gear, luffing, rotating parts and climb and so divided. Below briefly describes the common rail type, climbing type, attached tower crane.
(1) rail-mounted tower cranes. Rail-mounted tower crane crane is one of the most widely used in civil engineering.
It can walk with heavy, fan kitchen, homework, and fewer non-productive time, high production efficiency. Primary properties of rail-mounted tower cranes: jib length, crane, lifting, lifting speed and walking speed, and so on.
(2) climbing tower crane. Also known as the inside-climbing tower crane, typically installed in the building's elevator shaft within the Bay or ad hoc can also be installed inside a tubular structure, relying on climbing mechanismincreases with structure, usually every construction 3~Sm, crane will climb once, the tower height to be around 20m, lifting height depends on the construction of a high degree.
Climbing crane's advantages are: cranes building supports, towers are a short, lifting height, but does not occupybuildings in outer space. The disadvantages are: driver jobs often do not see lifting the whole process needed signal, demolished after the end of construction complex, generally require auxiliary crane dismantling.
(3) the attached tower crane. Also called self-elevating tower crane is directly fixed to the building or structure on a concrete foundation near, as the structure rises, continue to pick their own high towers, the lifting height increases. Stable Tower, the Tower every 20m about height stem and structural anchorage. -Attached tower crane installed on structures nearby, drivers can see the whole process of lifting, their installation and disassembly without prejudice to the construction process.
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