SECTION 02631
PRECAST MANHOLES
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. This Section covers all precast sewer manholes complete, including, but not limited to,
bases, walls, cones, mortar, inverts, frames and covers.
B. Work shall comply with City of Nashua Standard Specifications for Sewers and Drains,
which are hereby incorporated by reference.
1.02 RELATED WORK:
A. Section 02300, EARTHWORK.
B. Section 02745, ROAD RESTORATION
1.03 SYSTEM DESCRIPTION:
A. Precast sections shall conform in shape, size, dimensions, materials, and other respects to the
details indicated on the drawings or as ordered by the Engineer.
B. All manholes shall have concrete bases. Concrete bases shall be precast unless otherwise
specified. Invert channels shall be formed of brick and mortar upon the base.
C. Riser and cone sections shall be precast concrete.
1.04 REFERENCES:
A. The following standards form a part of this specification as referenced:
American Society for Testing and Materials (ASTM)
ASTM A48 Gray Iron Castings
ASTM C32 Sewer and Manhole Brick
ASTM C144 Aggregate for Masonry Mortar
ASTM C207 Hydrated Lime for Masonry Purposes
ASTM C478 Precast Reinforced Concrete Manhole Sections
ASTM (C923 Specification for Resilient
2019 CIPP Lining Project Precast Manholes
Nashua, NH 02631-1
