This invention relates to a road gully or inspection cover assembly, and more particularly to such an assembly that permits ready adjustment of the vertical position of the cover of the assembly.
It is a necessary part of the construction of new roads to incorporate water gullies and manholes therein all of which have to be covered, the covers eventually needing to be at the finished level of the road.
Common practice is initially to construct a road to a base course level and thereafter to apply a wearing course of substantial thickness to complete the road.
The gullies and manholes are incorporated prior to application of the wearing course, and invariably extend above the base course with their covers located at a level anticipating that of the final wearing course.
Therecourse, results in the accumulation of large pools of water on the roads during wet weather.
It has been proposed, for example in my European patent no. 0715028, to provide a road gully or inspection cover assembly the position of the cover of which can be adjusted to accommodate the difference in levels between the base course and the wearing course of the road.
More particularly, the known assembly comprises a fixed outer frame and an adjustable inner frame slidably supported in the outer frame and capable of being located at any position between a lowermost position and an uppermost position, the inner frame supporting the cover of the assembly whereby the cover can initially be located at the base course level of the road, and subsequently raised and located