Abstract: A prefabricated pier system provides prefabricated foundation and cap components for assembly with a series of steel H section columns to facilitate construction of bridges, overpasses, and similar structures. Each foundation component comprises a prefabricated column base sleeve, with sleeve pairs welded to a horizontal support to form pier foundation assemblies. These prefabricated assemblies are then welded to leveling beam pairs at the construction site and anchored in a concrete footing to form the foundation for each pier assembly. Each pier cap comprises a series of prefabricated sections, each having a single depending column end pocket for accepting a pair of column members therein. The sections are assembled to form the completed pier cap box, installed atop the column members, and used as a permanent form for casting the concrete pier cap. The present system may be used with either conventional single girder span construction or with built up girders.

Abstract: A prefabricated pier system provides prefabricated foundation and cap components for assembly with a series of steel H section columns to facilitate construction of bridges, overpasses, and similar structures. Each foundation component comprises a prefabricated column base sleeve, with sleeve pairs welded to a horizontal support to form pier foundation assemblies. These prefabricated assemblies are then welded to leveling beam pairs at the construction site and anchored in a concrete footing to form the foundation for each pier assembly. Each pier cap comprises a series of prefabricated sections, each having a single depending column end pocket for accepting a pair of column members therein. The sections are assembled to form the completed pier cap box, installed atop the column members, and used as a permanent form for casting the concrete pier cap. The present system may be used with either conventional single girder span construction or with built up girders.

Abstract: The roll beam girder system for bridges has beams constructed from two end sections and a keystone center section. The two end sections have a top rolled steel beam welded to a bottom rolled steel beam, the top beam comprising about two-thirds of the total height of the section, the top beam being shorter than the bottom beam at the end joining the keystone section, the projecting end of the bottom beam having a slight camber. The keystone section has a top girder and triangular bottom key sections. The end sections and the keystone section have mating 45.degree. ends, with the ends of the top beam of the keystone section resting on the top of the projecting end of the bottom beam of the end section, a compression splice being formed by a row of nine bolts through the flanges on either side of the web of the mating end section and keystone section beams.