[Properties, Test Methods and Minimum Values for
Rubber used in Preformed Joint Seals
Test Methods
EPDM
Neoprene
Butyl mastic
2.3.4
Metal Items
2.3.4.1
Frames, Covers, and Gratings for Manholes
FS A-A-60005, cast iron; figure numbers shall be [as follows] [as
indicated]:
a.
Traffic manhole:
Provide in paved areas.
Frame:
Figure 1, Size 22A
Cover:
Figure 8, Size 22A
Steps:
Figure 19
b.
Non-traffic manhole:
Frame:
Figure 4, Size 22
Cover:
Figure 12, Size 22
Steps:
Figure 19
Frames and covers shall be cast iron, ductile iron or reinforced concrete.
Cast iron frames and covers shall be as indicated or shall be of type
suitable for the application, circular, without vent holes. The frames and
covers shall have a combined weight of not less than 181.4 kg 400 pounds.
Reinforced concrete frames and covers shall be as indicated or shall
conform to ASTM C 478M ASTM C 478. The word "Sewer" shall be stamped or
cast into covers so that it is plainly visible.
2.3.4.2
Manhole Steps
[Zinc-coated steel] [as indicated] conforming to 29 CFR 1910.27. [As an
option, plastic or rubber coating pressure-molded to the steel may be used.
Plastic coating shall conform to ASTM D 4101, copolymer polypropylene.
Rubber shall conform to ASTM C 443M ASTM C 443, except shore A durometer
hardness shall be 70 plus or minus 5.] Aluminum steps or rungs will not be
permitted. Steps are not required in manholes les 1.2 m 4 feet deep.
2.3.4.3
Manhole Ladders
A steel ladder shall be provided where the depth of a manhole exceeds 3.6 m
12 feet. The ladder shall not be less than 406 mm 16 inches in width, with
19 mm 3/4 inch diameter rungs spaced 305 mm 12 inches apart. The two
stringers shall be a minimum 10 mm 3/8 inch thick and 51 mm 2 inches wide.
Ladders and inserts shall be galvanized after fabrication in conformance
with ASTM A 123/A 123M.
2.3.2.4
Septic Tank Piping
Cast iron soil pipe and fittings.
2.3.2.5
Siphon for Septic Tank
Welded steel or close-grained cast iron free from flaws, of an approved
standard design, and prompt and positive in action.
SECTION 02531
Page 27
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