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Cranes
Published in John E. Schaufelberger, Giovanni C. Migliaccio, Construction Equipment Management, 2019
John E. Schaufelberger, Giovanni C. Migliaccio
A launching gantry crane (also known as a launching girder or bridge erection crane) is a special purpose mobile gantry crane used in bridge construction. It is used to lift, carry, and place precast bridge segments. The main girder, as shown in Figure 17.13, is fabricated from welded steel giving it low weight and great strength. The launching gantry is used to place concrete bridge segments by spanning the distance between a finished section of the bridge and the next pier. While spanning the distance, the launching gantry picks up each bridge segment and sets it into place as illustrated in Figure 17.14. The segments are then epoxied together and post-tensioned into place. Following the successful placement of the bridge segments to the next pier, the entire launching gantry is then moved forward to the next span.
Material Handling Systems
Published in Susmita Bandyopadhyay, Production and Operations Analysis, 2019
Bridge crane, as the name suggests, has a bridge mounted on an elevated track that can rotate in three axes. Gantry crane is an overhead crane that has a fixed support or gantry. Load lifting is done by a hoist that is connected to a trolley. Stacker crane has platform to place the load upon. This type of crane is especially useful for stacking operation at large height. Single girder crane is equipped with large metal beam or girder for hoisting the load. Both the number and type of girder vary. The number of girders for a double girder crane is two. Box girder crane is a type of bridge crane in which the girder is in the form of a box for safe carriage over longer distance.
Proportional–integral-derivative controller with inlet derivative filter fine-tuning of a double-pendulum gantry crane system by a multi-objective genetic algorithm
Published in Engineering Optimization, 2020
Mahmoud H. Abdel-razak, Atef A. Ata, Khaled T. Mohamed, Eman H. Haraz
Industrial cranes can be divided into three main types: bridge (gantry) cranes, tower (rotary) cranes and boom cranes. Gantry cranes have many applications, especially in transporting heavy loads in shipyards and construction projects, and also transporting hazardous material in nuclear power stations, nuclear installations, and petrochemical and fertilizer factories (Ramli et al. 2017).