Patent ID: 7010890

Claim:
A precast, prestressed concrete truss, comprising: a load bearing top chord configured to support elements that form a floor and/or ceiling, a load bearing bottom chord configured to support elements that form a floor and/or ceiling, and a plurality of web members interconnecting the top chord and the bottom chord; the top chord, the bottom chord, and the web members being integrally formed from concrete; wherein the truss has first and second ends, the top and bottom chords extend from the first end to the second end, and the bottom chord is linear from the first end to the second end; prestressed reinforcing members embedded in the concrete of the top and bottom chords, the prestressed reinforcing members applying stress in the top and bottom chords; and at least one opening in the truss between two adjacent web members and between the top and bottom chord, the opening having dimensions sufficient to form a corridor passage in a building in which the truss is used.