5057 x 3371 px | 42,8 x 28,5 cm | 16,9 x 11,2 inches | 300dpi
Data acquisizione:
dicembre 2006
Ubicazione:
Sheffield Yorkshire uk
Altre informazioni:
Tower cranes are a common fixture at any major construction site. The construction crew uses the tower crane to lift steel, concrete, large tools like acetylene torches and generators, and a wide variety All tower cranes consist of the same basic parts: The base is bolted to a large concrete pad that supports the crane. The base connects to the mast (or tower), which gives the tower crane its height. Attached to the top of the mast is the slewing unit -- the gear and motor -- that allows the crane to rotate: The long horizontal jib (or working arm), which is the portion of the crane that carries the load. A trolley runs along the jib to move the load in and out from the crane's center: The shorter horizontal machinery arm, which contains the crane's motors and electronics as well as the large concrete counter weights: The motors that drive the slewing unit are located above the unit's large gear:
