Cable tray

Details Cable tray Cable tray

1974-10-30

1976-02-17

Frazier, Roy D.

Supports

Pipe or cable

Suspended

174 68C, 403 49, 403245, 248 68R, E21F 1702, F16L 300

Patent

active

039387674

ABSTRACT:
A cable tray has side rails and rungs formed from sheet metal. The side rails have outwardly opening upper and lower grooves which are keystone shaped in that the open side of the groove is narrower than the inner side of the grooves. The lower groove provides an inwardly offset flange along the side rail and the hollow rungs, which are formed with a substantially square cross-sectional shape fit around substantially square portions of the flange which are defined by pairs of spaced vertical slots across the flange. The rung-ends have horizontally aligned rectangular slots through their sides and rung joiners, which have a rectangular cross-sectional configuration are driven through the aligned slots, the joiners having a drive fit between the closed vertical side of the flange and the ends of the aligned slots which are adjacent the end of the rung, thus forcing the rung end against the side rail web. Novel hangers are inserted in the side rail lower slots for supporting the tray sections and side rail connectors are provided for the upper and lower side rail grooves of endwise abutting sections. The connectors have a cross-sectional configuration conforming to that of the groove in which it is placed and pointed screws threaded through holes in the connectors hold them in place during erection of the tray.

REFERENCES:
patent: 1540140 (1925-06-01), Ohnstrand
patent: 3266202 (1966-08-01), Furer
patent: 3521843 (1970-07-01), Ogle
patent: 3791613 (1974-02-01), Nollen

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