Standard Specifications and Special Provisions
Main Street Sidewalk Improvements- Block 3 & 4 Crosswalk Curbing
Date: May 3, 2016
All Items that are not included in the special provision shall comply with the latest approved
NHDOT Standard Specifications for Road and Bridge Construction, the latest approved City of
Nashua Standard Specifications for Road Construction Sewer and Drains, the latest approved
NHDOT Standard Plans for Construction and the latest approved edition of Manual of Uniform
Traffic Control Devices.
Special Provisions
ITEM A - Straight Granite Curb (flush 6x12") — Night Work
ITEM B — Curved 8"x22" Median Granite Curb — Night Work
ITEM C - Straight 8"x22" Median Granite Curb — Night Work
A. SCOPE
This work shall consist of installing straight granite curb (Item A) at the crosswalks and straight
and curved granite curb at the crosswalk median islands (Item B & C) on Block 3 & 4, following
the plan provided or as ordered by the Engineer. The top of the curb shall be of thermal finish.
This work will be conducted at night and the City will be responsible for providing traffic
control.
B. MATERIALS AND CONSTRUCTION
The Contractor shall furnish joint material, labor, and equipment necessary for constructing
granite curb in accordance with relevant provisions of Section 609 of the NHDOT Standard
Specifications for Road and Bridge Construction, 2016. The City will provide the granite curb.
The City will provide the layout plan, elevations and traffic control during construction.
All required excavation including existing asphalt and base course material will be performed by
the City. In addition, the City will prepare base prior to curb installation.
The City will be responsible for providing the tower lights. The curb will be installed in between
7:00 pm to 5:30 am or as directed by the Engineer and shall not take more than two nights.
The Contractor shall use a digital "Smart Level" to check all sub-base grades for compliance
prior to installation of curb. The Contractor shall not proceed with curb installation on the
crosswalk if it is out of compliance without first contacting the Engineer.
Curb at the crossings (Item A) shall be flushed with road surface and shall have 4” clean back to
allow paver to be installed behind the curb. Curb at the median islands (Item B & C) shall have a
10” reveal from the road surface and shall have 4” clean back to allow paver to be installed
behind the curb.
TFB0851-052716 Main Street Improvements —
Block 3 & 4 Granite Curbing at Crosswalks and Median Islands
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