Patent ID: 7275348

Claim:
A precast, prestressed concrete truss, comprising: a top chord, a bottom chord, 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; and the web members include first and second side surfaces, and wherein the top and bottom chords each include at least one ledge that projects beyond one of the first and second side surfaces in a direction perpendicular to a vertical plane extending between the top and the bottom chords; prestressed reinforcing members embedded in the concrete of the bottom chord to resist tension stresses as result of the truss acting as a flexural member, the prestressed reinforcing members applying stress in the bottom chord; 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, and the opening has a height greater than about 80 inches and a width greater than about 48 inches; wherein the web members comprise vertical and diagonal web members.