Static structures (e.g. – buildings) – Including component designed to receive a disparate article... – Supported from ceiling
Patent
1980-01-14
1982-03-09
Murtagh, John E.
Static structures (e.g., buildings)
Including component designed to receive a disparate article...
Supported from ceiling
52639, 52690, E04C 306, E04B 555
Patent
active
043182526
ABSTRACT:
A joist or truss assembly adapted for supporting a grid system which is installed under a stage ceiling combined with supporting columns. The truss has a number of vertically disposed diaphragms which are received and bolted rigidly to upper and lower chords to form the truss. The upper chord has two spaced-apart arms extending upwardly and outwardly from an upper aspect of its central connection portion and which define between them an upper groove which has a vertical cross-section configuration of an upright "T". The upper portions of the chord's arms are horizontal, extending both outwardly and inwardly, to define a slot which provides access centrally into the groove. The lower chord is identical to the upper chord but is rigidly connected to the diaphragms in an inverted condition whereby it exposes at its bottom a lower groove having a vertical cross-section configuraton of an inverted "T". This lower groove including the entry slot as well as the upper groove, is cruciform-shaped as seen in cross-section and is adapted to receive other cruciform-shaped parts of underlying components. The grid system is normally secured in place from the overhead truss by hanger rods through support members having a horizontal flange and a support part of cruciform-shaped cross-section to mate with and be received slideably within the cruciform-shaped groove defined at the bottom of the truss. The bottom of the truss is adapted to receive chain links in its cruciform-shaped groove for supporting depending chains either for safety purposes or for support of underlying elements.
REFERENCES:
patent: 1665782 (1928-04-01), Hanna
patent: 1983632 (1934-12-01), Miller et al.
patent: 3019861 (1962-02-01), Rasch
patent: 3214875 (1965-11-01), Slowinski
patent: 3719818 (1973-03-01), Porter
patent: 4034957 (1977-07-01), Cody
patent: 4106256 (1978-08-01), Cody
Albright Penrose Lucas
Murtagh John E.
LandOfFree
Joist assembly for stage equipment support system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Joist assembly for stage equipment support system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Joist assembly for stage equipment support system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1835911