A beam or "girder" bridge is the simplest and most ... Pre-stressed concrete is an ideal material for beam bridge construction; the concrete withstands the forces of compression well and the ...

Up to the appearance of this volume there has been no data available for the torsional rigidity of beams of ordinary commercial ... of design of the bow-girder is included, and will be of service ...

On Monday, crews began installing the first three girders on the road, using a crane that swings the beam 60-70 feet above the ground before crews guide it into place. Each girder weighs between ...