LONG SPAN POST-TENSIONED STEEL/CONCRETE TRUSS AND METHOD OF MAKING SAME

摘要

ABSTRACT OF THE DISCLOSUREA long span truss of substantially conventional steelconstruction provided with concrete encasement of the top andbottom chords with the concrete encasement being reinforced and theconcrete encasement on the bottom chord and optionally on the topcord including post-tensioned steel tendons. The invention furtherrelates to a method of making the truss as described above in whichthe light structural steel truss is first erected and provided withtemporary steel scaffolding and bracing to support formwork.Reinforcing steel and steel tendons are placed in the formwork andconcrete is poured to encase the top and bottom chords of thetruss. The steel tendons are post-tensioned to provide maximumload support capability. The truss of the present invention canbe used in situation where trusses are used to carry heavy loadsover long spans such as bridges, stadiums, convention halls and thelike and is especially beneficial when spanning a busy highway orwaterway with the trusses including a single span or continuoustrusses of two or more spans in which one or more intermediatesupports are employed.13