C. Castings shall be ASTM A48 Class 30B or better.
D. The surface of the manhole covers shall have a diamond pattern with the cast words
"DRAIN" or "SEWER," whichever is appropriate.
E. Manhole frames with 32-inch covers for 30-inch openings shall be 500 pounds minimum by
E.L. LeBaron Foundary Co., No. LC328; Quality Water Products, Style 47; Neenah
Foundry Co., R1740B or approved equal.
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 castings shall have 2-inch square grate openings, 23-7/8-inch square grates,
and shall be 8-inches in height and weigh 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 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.
2.04 CATCH BASIN ACCESSORIES:
A. Anoil and debris trap shall be furnished and installed on outlet pipes in all catch basins. The
trap shall be The Eliminator® as manufactured by Groundwater Rescue, or approved equal.
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
2019 Sewer Replacement Project Precast Manholes and Catch Basins
Nashua, NH 02631-5
