| A crane, which is equipped with a derrick or | | | | is known as railroad crane. Mobile cranes are the |
| tower, is used to lower and lift materials with the | | | | most basic and common type of crane, which as |
| use of pulleys and cable. Heavy equipment | | | | the name implies, can be carried easily to any |
| manufacturers and the construction industry use | | | | place. |
| cranes in various activities connected with their | | | | Tower cranes are fixed to the ground. These are |
| process. Cranes used in the construction industry | | | | mostly used in buildings for the best combination |
| are mostly temporary structures either mounted | | | | of lifting capacity and height. A telescopic crane is |
| on a vehicle which is built for the specific purpose | | | | capable of lifting lower capacity but can reach |
| of carrying the crane, or fixed to the ground. | | | | greater heights. |
| Cranes may be controlled by various methods | | | | To provide greater mobility, a crane will be |
| such as radio control, infrared control or a built in | | | | mounted on a carrier truck and is known as a |
| control station using a push button pendant or by | | | | truck-mounted crane. Whereas the rough terrain |
| an operator sitting in the cab of the vehicle. | | | | cranes, which are mounted on four rubber tires, |
| A standardized hand signal is used between the | | | | are capable of pick and carry operations in rough |
| person operating the controls and the workers in | | | | terrain. Crawler cranes are mounted on a set of |
| the ground. Bigger installations use radio | | | | tracks with an undercarriage and have better |
| communication for this purpose. Loads can be | | | | stability and mobility. |
| positioned with great precision using such signals | | | | A suspended crane or overhead crane is used |
| by experienced crew of the crane. Crane vessels | | | | mostly inside factories and they are capable of |
| or ships often carry the largest revolving cranes. | | | | carrying very heavy loads. In automated and |
| For more info visit | | | | computer controlled warehouses, a stacker crane |
| It is a surprise to note from the carved stone | | | | with a forklift is used. |
| relief in Haterii's tomb of 1st century Rome, which | | | | During bridge or port construction, floating cranes |
| depicts a monument being built with a sort of | | | | are used. To load or offload awkward or heavy |
| crane, that cranes were used in medieval | | | | machinery floating cranes are ideal. They are also |
| shipyards and ports in Poland. | | | | used in offshore work. Aerial cranes, which are |
| The various types of cranes in common use are | | | | extended from helicopters, are used to lift large |
| railroad cranes, mobile cranes, telescopic cranes, | | | | loads. |
| tower cranes, truck-mounted cranes, rough | | | | The design of cranes is based on two major |
| terrain cranes, crawler cranes, loader cranes, | | | | considerations. First is to lift specified mass, the |
| floating cranes, gantry cranes and aerial cranes. | | | | second is its stability, and it should not topple over |
| A crane mounted on a railroad car or on a flatcar | | | | while performing lifting operations. |