Abstract: A trench assembly usable in floor structures of the type requiring one inch of concrete fill over the crests of metal cellular flooring. The trench assembly includes opposite sides and one or more end-abutted cover plates spanning the distance between and supported by the opposite sides. Each side comprises a side rail, a base member, and horizontally displaceable adjustment means, in the form of wedge means, for vertically displacing the side rail relative to the base member. The side rail, the base member and the adjustment means have a combined height of about one inch (2.54 cm) and are capable of a vertical adjustment of one-half inch (1.27 cm).

Abstract: A dual service outlet unit provides above-the-surface accessibility to power and to telephone and signal services. The unit includes cover and base members comprising segments of separate metal extrusions. When interfitted, the cover and base members provide separate compartments, one for power wiring and the other for telephone/signal wiring.

Abstract: An electrical activating assembly provides a flush-with-the-surface simplex or duplex electrical receptacle. The assembly incorporates support means comprising a receptacle support plate, and partition means dividing a chamber provided within a barrier, such as a floor, into a first compartment containing the receptacle and a second compartment for connections to low voltage services, such as telephone and signal services. The partition means may support a second receptacle which is accessible for plug connections from the second compartment. A protective closure member provides access to the receptacle from the barrier outer surface, and permits passage of the low voltage wiring from the second compartment.

Abstract: A wiring distribution system for fill-on-slab or fill-on-grade floor constructions, including an uninterrupted main unit providing main passageways and at least one laterally extending feeder unit providing feeder passageways supported on a substructure (-slab or -grade). A housing having a removable cover encloses a full-width segment of the main unit and an end segment of the feeder unit. A covering layer of concrete (fill-) surrounds the housing. A partition divides the interior of the enclosure into two compartments, a first communicating with one feeder passageway and a second communicating with the other feeder passageways. The main unit presents at least one common lengthwise trough extending through and beyond the opposite sides of the enclosure. First and second capping means enclose those portions of the common lengthwise trough on opposite sides of the enclosure to provide substantially unobstructed additional main passageways communicating with the second compartment.

Abstract: A closure device comprising an insert and capping means. The insert includes first, second and third generally U-shaped members. The first and second members cooperate with a lengthwise trough of the sheet metal element to provide laterally spaced-apart vertically presented chambers and a horizontal passageway therebetween. The capping means enclose those portions of the lengthwise trough on opposite sides of the first and second members to provide a substantially unobstructed additional raceway including the passageway. The third element which may be provided during installation of the closure device or during activation of the closure device caps the passageway and supports an electrical plug receptacle proximate to the finished surface of the floor for ready access. At least one additional electrical plug receptacle may be supported by either of the first and second members for access from the interior of one of the vertically presented chambers.

Abstract: An underfloor access housing adapted for use with cellular flooring units of the type normally placed in building floors, and which provide plural cells separated by troughs. The access housing presents a dual outlet opening in its top wall, spans across a trough, and is secured to the crests of adjacent cells. Trough closures positioned on opposite sides of the access housing, enclose a trough space accessible through the dual outlet opening. Cell access openings provided in the webs of the flooring unit establish communication between the cells and the trough space. A partition divides the interiors of the housing and of the trough space into separate compartments, each including one of the cell access openings and one including the dual outlet opening. The partition is adapted to support at least one electrical plug receptacle whereby electrical connections may be made beneath the level of the finished floor.

Abstract: An electrical trench assembly having a base pan and vertically adjustable side rails. Said side rails being secured to and carried by said base pan by means of adjusting screws, which are carried by said rails and which screw into threaded connections on said pan. The cover plate for the trench assembly is attached to the side rails by resilient fasteners.