Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Side-by-side terminus shafts; e.g. – truss
Patent
1980-03-28
1985-10-22
Murtagh, John E.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Side-by-side terminus shafts; e.g., truss
E04C 318
Patent
active
045480141
ABSTRACT:
A joist formed of a pair of aligned, vertically spaced apart chords interconnected by angularly arranged sheet metal webs extending between the chords. The chords are each formed of a pair of right angle cross-section metal strips, each having a horizontal leg and a vertical leg. The strips of each pair are aligned with their horizontal legs coplanar and with their vertical legs spaced apart a short distance to form a narrow vertical gap therebetween. The webs have opposite end portions which are snugly fit within the vertical gaps and are fastened to the vertical legs of the chord strips. A wood member is fastened upon at least one of the chords by positioning the wood upon the chord strips' horizontal legs and applying nails through the wood and into the gap so that the nails are frictionally locked between the vertical legs. In addition, vertically arranged wood strips interconnect the chords at the opposite ends of the joist.
REFERENCES:
patent: 2029645 (1936-02-01), Waugh
patent: 2063714 (1936-12-01), Waugh
patent: 3474578 (1969-10-01), Wippermann
patent: 3748809 (1973-07-01), Jackson
patent: 4077176 (1978-03-01), Bauer
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