| 摘要 |
<p>A roof truss of the kind having a bottom chord (13) and a pair of inclined top chords (11, 12), each of the chords having an approximate C channel cross sectional shape, wherein the top and bottom chords lie in a single vertical plane with the channels opening in the same direction. The bottom chord has openings formed in the top flange (20) of the channel at opposite ends and an upwardly projecting web extension (21) extending longitudinally to the bottom chord. Each of the top chords (11, 12) has at it's apex forming upper end cut to a shape so that their upper ends overlap with their webs in the region of the overlap being in face to face relation. The apex angle can be varied.</p> |
