F. Watertight type manhole frames with 32-inch diameter covers (bolted and gasketed) shall be
4 bolt, 630 pounds minimum by E.L. LeBaron Foundary Co. No. LCB328; Quality Water
Products, Style C47WT; Neenah Foundary Co., R-17550-H or approved equal.
G. Catch basin frames with 2-1inch square openings and 23-7/8-inch square grates shall be 8-
inches in height and 460 pounds minimum. They shall be Neenah Foundry Co. No. 3405;
Quality Water Products No. 45; E.L. LeBaron Type F; or approved equal.
H. — Catch basin frames with bar grate openings and 23-7/8-inch square grates shall be 8-inches in
height and 460 pounds minimum. Bar grates shall not be used in areas where bicycle
traffic could be present. They shall be Neenah Foundry Co. No. R-3589; Quality Water
Products No. 45; E.L. LeBaron LK121; or approved equal.
I. Catch basin frames with cascade grate openings and 23-7/8-inch square grates shall be 8-
inches in height and 430 pounds minimum. They shall be Neenah No. R-3589; Quality
Water Products Mass Standard; E.L. LeBaron No. LK121A; or approved equal.
J. Catch basin frames set against curbing shall have three flanges only. 2.04
SEWER MANHOLE ACCESSORIES:
A. Gasket materials shall be top grade (100% solids, vulcanized) butyl rubber and shall meet or
exceed AASHTO M-198.
B. Couplings at the manhole-pipe interface shall be made with a rubber seal system (with or
without stainless steel straps) meeting the requirements of ASTM C923 and recommended
for this type of connection.
C. — Stubs installed as specified and indicated on the drawings shall be short pieces of the same
class pipe as that entering the manhole and shall have either stoppers or end caps as shown on
the drawings. Stoppers or end caps shall be especially designed for that application.
PART 3 - EXECUTION
3.01 INSTALLATION:
A. PRECAST SECTIONS:
1. Precast bases shall be supported on a compacted level foundation of crushed stone, as
specified in Section 02300 EARTHWORK, at least 6-inches thick, but shall vary to
the depth necessary to reach sound undisturbed earth.
2. Precast reinforced concrete sections shall be set vertical and with sections in true
alignment.
3. Butyl rubber joint sealant shall be installed between each concrete section. Catch
basin sections do not require joint sealant if so indicated on the drawings.
0263 1-5
