| 摘要 |
A conduit assembly for supporting a cover of a maintenance structure with a passage therein. The conduit assembly includes one or more conduit segments. Each conduit segment has at least one aperture, an also includes top and bottom surfaces adapted to be positioned adjacent to bottom and top surfaces respectively of other conduit segments to form a conduit structure having a conduit passage therein alignable with the passage. The conduit structure has an inner wall surface defining the conduit passage and an opposed outer wall surface adapted to receive a coating of mortar. The condu it assembly also includes one or more shims for positioning on the top surface of the conduit segment, for locating the cover substantially at a predetermined position therefor.
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