| 摘要 |
A floor construction includes a metal floor decking having a plurality of parallel multi-cell cellular metal floor raceways each of which includes at least one cell for high voltage power wiring. This one cell has a first wiring opening defined in a top thereof. A limited access feeder raceway transversely spans and rests upon the cellular metal floor raceways. The feeder raceway includes an enclosed first wiring raceway separating bottomless second and third wiring raceways. The enclosed first wiring raceway has a plurality of spaced second wiring openings defined through a bottom thereof, one of said second wiring openings being located directly above and in registry with each of the first wiring openings. The feeder raceway includes a closed top having a plurality of spaced access openings defined therethrough, one of which access openings is located directly above each of the second wiring openings. A plurality of access units are mounted upon the feeder raceway, one being associated with each access opening. The access units extend upward from the closed top of the feeder raceway to about a floor level for providing access downward through the access openings into the first, second and third wiring raceways of the limited access feeder raceway and into the cells of the multi-cell cellular metal floor distribution raceways. A concrete floor is poured on top of the metal floor decking and over the closed top of the limited access feeder raceway up to the floor level. An alternative two cell bottomless limited access feeder raceway is also disclosed.
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