Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Side-by-side terminus shafts; e.g. – truss
Patent
1978-04-24
1980-04-01
Friedman, Carl D.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Side-by-side terminus shafts; e.g., truss
52729, 52730, E04C 302
Patent
active
041954629
ABSTRACT:
A particleboard web member interconnects a pair of wood chord members by means of glued tongue and groove joints to form an I-beam or roof truss. A pair of grooves in each chord member receives a pair of parallel tongues on the web member. The grooves are inclined from top to bottom to bend the tongues out of parallelism and form self-locking dovetail-type joints which hold the members together in assembled relation without the use of external clamps while the glue is setting.
REFERENCES:
patent: 1377891 (1921-05-01), Knight
patent: 3490188 (1970-01-01), Troutner
patent: 3991535 (1976-11-01), Keller et al.
patent: 4042307 (1977-08-01), Jarvis
Keller James R.
Nickerson William A.
Friedman Carl D.
Schermerhorn Lee R.
Wood I Systems, Inc.
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