| 摘要 |
A subfloor electrical trench duct includes an elongated U-shaped body supported by adjustable support members and has an access cover. The cover is supported by one leg of each of a pair of identical, oppositely disposed L-shaped channels extending axially of the body. A first leg of each channel has a predetermined width such that it will extend to a position substantially flush with the outer surface of the cover when the cover is supported by the second leg. The second leg, in turn, has a predetermined width such that it extends a predetermined distance above the cover when the cover is supported by the first leg for accommodating placement of carpet or tile on the cover. Each channel includes an elastomeric sealing member disposed at the internal vertex area thereof to effect a seal with the cover. A seal member is also advantageously provided at the facing end areas of adjacent covers.
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