Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Curvilinear or peaked truss
Patent
1995-07-17
1998-10-13
Canfield, Robert
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Curvilinear or peaked truss
52645, 52646, 52 71, 403119, E04B 1343, E04B 138, E04C 302
Patent
active
058194924
ABSTRACT:
The present invention is a collapsible roof truss comprising two elongated wooden structural members consisting of upper and lower chords, the lower chord having a bevel end, the angle of which corresponds to the roof pitch. The hinging mechanism comprises two identical metal disks, each having a rigid annulus at its respective periphery and with an opening in the center therethrough to pivotally connect the disks. Each chord has grooves formed on both sides, the depth of the grooves being equal to the height of the annuli, the grooves on the upper chord being in the form of a semi-circle, the grooves on the lower chord being in the form of an arc corresponding to the angle formed by the bevel, and each chord having a notch therethrough at the center of the radii of the semi-circle and the arc respectively for receiving a fastener therethrough. The grooves, when chords are in assembled relation, form a nearly complete circle. A first disk is placed on one side of the assembled structural members so that its annulus is positioned in the grooves having corresponding radii. The second disk is similarly positioned on the opposite side of the assembled structural members. A fastener, such as a bolt, is passed through the respective openings in the disks and the notches, a nut applied thereby drawing the annuli securely into the grooves wherein rotative hinging occurs. At the job site, the roof component is elevated to its desired pitch.
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