The steel beams, each signed by the hundreds of construction ... out the temporary structure within the building. Like an arch, the diagrid did not support itself until it was completed," Rudolph ...

On the Fourth of July in 1940, the York Homeplace Memorial Bridge was dedicated with great fanfare. Sgt. Alvin C. York ...

This unusual arch bridge consists of short pieces of timber woven under and over cross-beams and then lashed together ... The New River bridge Today materials like steel and pre-stressed concrete ...