Losing ground

Article Abstract:

A steel bridge has been designed and built in Leicester, New York, to replace a three-span, multigirder bridge that had partially collapsed due to subsidence. The bridge was built by engineers at LaBella Associates, Rochester, New York. It contains a single-span steel girder and expansion bearings with strip seal expansion joints. A permanent jacking platform is situated at the sight to accommodate settling movements due to further subsidence.

Bridge construction

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Outside the box

Article Abstract:

The design, fabrication, and construction of the first steel bridge in the United States utilizing 100 ksi (690 MPa) high performance steel (HPS) are described. HPS box girders in conjunction with a structural system in which the girders would function as simple spans for dead loads and as continuous spans for live loads and superimposed dead loads was found economical even for spans shorter than 250 ft (76 m).

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Twin tied arches form gateway to downtown Denver

Article Abstract:

This article reports on the construction of steel tied-arches for the Speer Boulevard Bridge in Denver, Colorado. The main spans about 254 feet long, 60 feet wide, and about 60 feet high accommodate four lanes and sidewalks.

Analysis, Usage, Brief Article, Load factor design, Cable structures

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