Column hung truss system

An assembled structural beam comprising a top chord and a bottom chord mechanically connected by series of diagonal connecting members, said top chord including on an upper surface a longitudinally extending bolt slot, said bottom chord including on a bottom surface a longitudinally extending bolt slot, each of said top chord and said bottom chord having two opposed side surfaces with a shallow channel recess in one side and extending the length of said chord and a complementary projection on the opposite side and extending the length of said chord sized for receipt in said shallow channel recess;

• each of said top chord and said bottom chord being an extruded component and including a securing flange which cooperates with said diagonal connecting members to secure said top chord to said bottom chord.

An adjustable in length header beam comprising two beam sections secured one to the other in an overlapping manner, each beam section being an assembled structure having a top chord, a bottom chord and a series of connecting members secured therebetween;

• said top chords and said bottom chords of said beams including interfitting surfaces which maintain alignment of said beam sections relative to each other, said beam sections further including a series of holes in said top and bottom chords and a plurality of structural fasteners passing through aligned holes in said chords and in combination with said interfitting surfaces mechanically securing said beam sections.