| 摘要 |
An apparatus for adjusting the height and inclination of roadway and greenw ay appurtenances includes a rigid annular spacer ring sized so as to be mountab le onto a manhole, and a manhole riser mountable onto the spacer ring. The riser substantially frusto-conically shaped. A rigid annular base flange may be mounted around a base end of the riser. A plurality of threaded bores are formed in spaced array around the base flang e. Rigid elongate threaded members are threadably mountable into the threaded bores so as to b e selectively threadably adjustable in the threaded bores and so as to protrude downwardly from the base flange into engagement, beneath the riser, with a top surface of the spacer ring when the riser is mounted on the spacer ring. The threaded members are threadably adjustabl e in the threaded bores to elevate or to tilt the riser relative to the spacer ring.< /SDOAB>
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