The work covered by this specification consists
of furnishing all plant, labor, equipment, appliances and materials,
and in performing all operations in connection with clearing and grubbing,
rough grading and street paving, complete, in accordance with the
specifications, applicable drawings and contract documents.
Adjusting rings. The use of brick adjustments
shall not be permitted. All manholes shall be adjusted to finished
grades utilizing no more than two, two-inch thick concrete adjusting
rings (four inches maximum thickness). Concrete adjusting rings shall
be one piece, no split rings will be allowed. Joints between cone
section, adjustment rings and frame shall be sealed with RAM-NEK or
Rub'R-Nek material to provide a watertight seal. If the proper adjustment
cannot be achieved by the use of two rings, the cone section shall
be removed and the proper barrel section inserted. The elevation of
the manhole frame and cover in new Township streets shall be set 1/8
inch to 1/4 inch below the binder course until the wearing course
is constructed. At the time of wearing course construction the frame
and cover shall be adjusted to finished grade by the use of concrete
adjusting rings.