Bridges and girders of similar structures, defined by a long package, have a volume whose behavior includes an enhanced understanding and shows weight loss and high strength corrosion and systems. Their respective organizational structures

摘要

Beam Construction which includes An elongated Housing that defines a first opening, a First conduit within the interior volume of the elongated Envelope,A Second conduit extending along at least a portion of the length of the elongated Shell, and a First Flange; and System Construction.