Girder Shifting By Hydraulic Jack 

Launching Girder is also known as Launching Gantry. ... A launching girder usually consists of main trusses (“girders”) and lifting devices that would move horizontally along the trusses while suspending/lifting the precast beam, bridge segments, and/or working platforms for assembling.
One of the greatest safety risks during bridge construction is an unsecured girder toppling over, and worst still, falling off the bridge altogether. By erecting the girders from the center of the bridge first and then working outwards, the risk of a girder falling off the bridge is reduced.
If headstock sidewalls are required, they shall be constructed before the girders are erected. These walls improve aesthetics and safety. The walls shall be strong enough to resist impact loads during the installation of the girders.
The Contractor is responsible for ensuring the stability of the girders during construction. This usually involves temporary bracing between the girders or temporary propping of the girders.
#Girder_Shifting
Tags:
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Civil construction, Bridge construction, Construction, Civil Engineering
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