Manhole Structures and Pipes
ASTM C1244 Standard Test Method for Concrete Sewer Manholes by the
Negative Air Pressure (Vacuum) Test.
American Association of State Highway and Transportation Officials (AASHTO)
AASHTO M198Joints for Circular Concrete Sewer and Culvert Pipe Using
Flexible Watertight Gaskets
Occupational Safety and Health Administration OSHA 29 CFR 1910.27
Fall Prevention Protection
1.05 SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL
SPECIFICATIONS, SUBMIT THE FOLLOWING:
A. — Six sets of manufacturer literature of the materials of this section shall be submitted to the Engineer
for review.
B. _ Tests reports as required shall be submitted to the Engineer.
PART 2 - PRODUCTS
2.01 | PRECAST CONCRETE SECTIONS:
A. All precast concrete sections shall conform to ASTM C478 with the following exceptions and
additional requirements:
1. The wall thickness of precast sections shall be as designated on the drawings, meeting
the following minimum requirements:
Section Diameter (Inches) Minimum Wall Thickness (Inches)
48 5
60 6
2 7
84 8
2. Type II cement shall be used except as otherwise approved.
3. Sections shall be steam cured and shall not be shipped until at least five days after having
been cast.
4. Minimum compressive strength of concrete shall be 4000 psi at 28 days.
5. No more than two lift holes may be cast or drilled in each section.
2022 Sewer Replacement Project Precast Manholes and Catch Basins
Nashua, NH 02631-2
