The present invention is directed to a truss system comprising first and second chords and a number of joists in bolted connection to form a load bearing structure. The first and second chords extend longitudinally in parallel alignment to form the beams upon which a load will be spread across. The first and second diagonal members of a joist are aligned at approximately 45 degree angles to the first and second chord, and perpendicularly to each other, to maximize the load bearing capabilities of the truss system. By utilizing a utility support grid to couple a first truss to a second truss, the present invention can support a load spread over a greater area.