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ITEM 608.24 —- 4” CONCRETE SIDEWALK
ITEM 608.36 — 6” REINFORCED CONCRETE SIDEWALK

A.

SCOPE

This work shall consist of constructing four inch (4”) thick sidewalks, five feet (5’-0”)
wide of Portland cement concrete, or six inch (6”) thick curb landings of reinforced
concrete with 6 x 6 — W 2.9 x W 2.9 Steel mesh as shown on the plans or as ordered by
the Engineer. Work includes but is not limited to furnishing, placing, finishing, curing,
stripping, coating and cleanup work associated with the installation of the sidewalk or
walkway. Existing subgrade materials will be evaluated to be reused or will need to be
excavated and replaced with 6” of compacted crushed gravel. The sidewalk shall have a
maximum cross slope of 2%, reinforced (if required) and graded to properly drain. The
curb ramps shall have a maximum cross slope of 2% and maximum running slope of
8.33% but shall not require the ramp length to exceed 15’ if chasing grade. If the road
grade is greater than 2% the ramp or edge of a flush landing may be warped to meet the
street running grade. Curb ramps require a level (2% or less slope in any direction) 5’x5’
reinforced 6” thick landing wherever a turning maneuver is required. All curb ramps shall
be installed with a flush transition to the road surface.

MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for constructing
concrete sidewalk or walkway in accordance with relevant provisions of Section 608 and
Section 520 of the NHDOT Standard Specifications for Road and Bridge Construction,
latest edition. Reinforcement and coating shall be subsidiary. Removal of existing
sidewalk and curbing, earth excavation and crushed gravel subgrade shall be subsidiary.
Transportation and disposal of the removed material shall be the responsibility of the
Contractor. Detectable Warning shall be installed at all curb ramps.

MEASUREMENT AND PAYMENT

Four-inch (4”) concrete sidewalk will be paid for at the contract price per square yard,
complete in place. The area occupied by the curb will not be included in the final pay
quantity. Six-inch (6”) reinforced concrete landings will be paid for at the contract unit
price per square yard, complete in place. Both Items shall include full compensation for
material, equipment and labor to complete this portion of the Bid Schedule. Relocation
of existing small plants and bushes shall be incidental to this item.

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ITEM 608.54 - DETECTABLE WARNING DEVICES, CAST IRON

A.

SCOPE

This work shall consist of furnishing and installing a detectable warning surface, concrete
sidewalk pad and tip-down ramp, and accessories at locations shown on the plans, as
specified herein, or as ordered including any and all required surface preparation.

MATERIALS AND CONSTRUCTION

Detectable warnings shall be installed at sidewalk ramps where a sidewalk crosses a
public vehicular way, excluding unsignalized driveway crossings. Detectable warnings
shall measure 24” in the direction of travel and extend the full width of the sidewalk ramp
and the edge nearest the curb line shall be located 6 to 8” from the face of curb line.

Detectable warnings shall consist of a surface of truncated domes and shall comply with
section 705 of the ADA and ABA Guidelines for Buildings and Facilities. Truncated
domes in a detectable warning surface shall have a base diameter of 0.9 inch (23 mm)
minimum and 1.4 inches (36 mm) maximum, a top diameter of 50 percent of the base
diameter minimum to 65 percent of the base diameter maximum, and a height of 0.2 inch
(5.1 mm). Truncated domes shall have a center-to-center spacing of 1.6 inches (41 mm)
minimum and 2.4 inches (61 mm) maximum, and a base-to-base spacing of 0.65 inch (17
mm) minimum, measured between the most adjacent domes on a square grid. Detectable
warning surfaces shall be either natural patina or federal yellow cast iron as directed by
the engineer. The detectable warning shall be placed on a Portland cement concrete
sidewalk pad.

Tap Alamerer of
ce 6o a of the base diameter ', =
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Figure 705.1 Size and Spacing of Truncated Domes
MEASUREMENT AND PAYMENT
This item shall be measured by the Square Yard of Detectable Warning Devices installed.
Payment for this item shall be at the contract unit price per Square Yard. This payment

shall also include all materials, labor, equipment, and all else needed to complete the
work under this item.

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ITEM 609.01 - GRANITE CURBING
A. SCOPE

This work shall consist of constructing straight or curved granite curb as shown on the plans or
as ordered by the Engineer. Work includes furnishing, placing, and cleanup work associated
with the installation of the curb. Curb shall be installed on a properly graded, compacted bed of
crushed gravel subgrade.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for setting of granite
curb in accordance with relevant provisions of Section 609 of the NHDOT Standard
Specifications for Road and Bridge Construction, latest edition, and City of Nashua Standard
Specifications for Sidewalk Construction, latest edition. The most stringent specifications shall
apply unless otherwise directed by the Engineer.

Granite curb shall be set with concrete. Concrete shall extend from the top of the binder course
of pavement to below the bottom of the granite curb.

C. MEASUREMENT AND PAYMENT

Granite Curbing will be measured by the linear foot to the nearest 0.1 foot, from end to end along
the lower edge of the exposed face of the curbing and shall include all required excavation and
base course material.

Payment for Granite Curbing shall be at the contract unit price per linear foot, complete in place,

and shall include full compensation for material, labor, equipment, and all else needed to
complete the work under this item.

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ITEM 609.5 -RESET GRANITE CURB
A. SCOPE

This work shall consist of removal, stockpiling and resetting granite curb as shown on the
drawings or as directed by the Engineer. Furnishing and placing all materials required for
resetting granite curb shall be included.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for resetting granite
curb in accordance with relevant provisions of Section 609 of the NHDOT Standard
Specifications for Road and Bridge Construction, latest edition, and City of Nashua Standard
Specifications for Sidewalk Construction, latest edition. The most stringent specifications shall
apply unless otherwise directed by the Engineer.

Granite curb shall be set with concrete. Concrete shall extend from the top of the binder course
of pavement to below the bottom of the granite curb.

C. MEASUREMENT AND PAYMENT

Reset Granite Curb will be measured by the linear foot to the nearest 0.1 foot, from end to end
along the lower edge of the exposed face of the curbing. Payment for this item shall be at the
contract unit price per linear foot, complete in place, and shall include all materials, labor,
equipment, and all else needed to complete the work under this item.

Contractor shall record the location and linear feet of granite curb reset for each street. Payment
is contingent upon submittal of quantities in a per street format.

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ITEM 609.811 —- BITUMINOUS CURBING

A. SCOPE

This work shall consist of constructing bituminous curbs as shown on the plans or as ordered by
the Engineer. Work includes all furnishing, placing, and cleanup work associated with the
installation of the curbing.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
constructing bituminous curb as shown on the plans, or as directed by the Engineer. Construction
shall be in accordance with relevant provisions of Section 609 of the NHDOT Standard
Specifications for Road and Bridge Construction, latest edition. Bituminous curb shall be Type
‘B’ (4” Reveal) per NHDOT Standard Details (Plate 1, Standard CR-2). Surface preparation
shall be subsidiary.

C. MEASUREMENT AND PAYMENT

Bituminous Curbing will be measured by the linear foot to the nearest 0.1 foot, from end to end
along the lower edge of the exposed face of the curbing. Payment for constructing bituminous
curb shall be at the contract unit price per linear foot, complete in place, and shall include full
compensation for material, labor, equipment and all else needed to complete the work under this
item.

Contractor shall record the location and linear feet of bituminous curb installed for each street.
Payment is contingent upon submittal of quantities in a per street format.

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ITEM 615.03 — TRAFFIC SIGN TYPE C

A.

SCOPE

This work shall consist of furnishing and erecting regulatory and warning traffic signs
and sign supports as shown on the plans or as ordered by the Engineer.

MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for installing
traffic signs, including new posts, foundations, bases and all necessary mounting
hardware in accordance with relevant provisions of Section 615 of the NHDOT Standard
Specifications, latest edition.

MEASUREMENT AND PAYMENT

Traffic Sign Type C will be measured by the square foot. Payment for Traffic Sign Type
C will be at the contract unit price per each square foot, complete in place, and shall
include full compensation for removal of existing signs and posts where being replaced
by new signs, and for material, equipment and labor to complete this portion of the Bid
Schedule.

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ITEM 615.033 - REMOVING TRAFFIC SIGN, TYPE C

A.

SCOPE

This work shall consist of removing existing regulatory, warning, and directional traffic
signs and sign supports as shown on the plans or as ordered by the Engineer.

MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for removing
traffic signs, including posts, foundations, bases and all necessary mounting hardware in
accordance with relevant provisions of Section 615 of the NHDOT Standard
Specifications, latest edition.

MEASUREMENT AND PAYMENT

Removing Traffic Sign Type C will be measured by each sign and post removed.
Payment for Traffic Sign Type C will be at the contract unit price per each, complete
removal, and shall include full compensation for material, equipment and labor to
complete this portion of the Bid Schedule. No payment will be made for removal of
signs replaced under other items.

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ITEM 615.06 — TRAFFIC SIGN TYPE CC

A.

SCOPE

This work shall consist of furnishing and erecting regulatory and warning traffic signs
shown on the plans or as ordered by the Engineer.

MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for installing
traffic signs, and all necessary mounting hardware in accordance with relevant provisions
of Section 615 of the NHDOT Standard Specifications, latest edition.

MEASUREMENT AND PAYMENT

Traffic Sign Type CC will be measured by the square foot. Payment for Traffic Sign
Type CC will be at the contract unit price per each square foot, complete in place, and
shall include full compensation for removal of existing signs and posts where being
replaced by new signs, and for material, equipment and labor to complete this portion of
the Bid Schedule.

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ITEM 616.191 — ALTERATION OF TRAFFIC SIGNALS — 360 DEGREE
TRAFFIC CAMERAS

A. SCOPE

This work shall include the labor and material for the installation of a GRIDSMART Video
Detection System. The GRIDSMART Video Detection System shall include GS2 Processor, 360
Degree Camera, Mounting Hardware, Data Module, Surge Protection, and CatSe Underground
Shielded Wire, and any additional hardware or software required for a complete installation in
accordance with manufacturer recommendations.

B. MEASUREMENT AND PAYMENT

This item will be measured and paid per each 360 GRIDSMART Camera installed. Payment
shall include all costs associated with purchasing and installing the camera.

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ITEM 616.7 - LOCAL TRAFFIC LOOPS 6’ X 50’ (2-4-2 TURN)

A. SCOPE

This work consists of furnishing all labor, materials and equipment necessary to install the
quadruple loop detectors as directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

This item shall include all labor, materials and equipment necessary to install new quadruple
loop detectors 2-4-2 turn, in conjunction with the paving program. Loops shall be installed in the
pavement surface prior to final overlay or top course.

a. Installation shall be in accordance with the latest approved NHDOT Standard Details
and Specifications.

b. The City of Nashua will connect the new loop in the control panel if needed

c. Contractor will make connection in pull box. Contractor will solder, wire nut and
silicone seal connections for new loop at pull box. “Hockey puck” will not be used.

C. MEASUREMENT AND PAYMENT
Payment for this item shall be at the contract unit price specified for each. This payment shall
include all materials, labor, equipment, and all else needed to complete the work under this item

and make loops functional.

Contractor shall record the location of each loop. Quantities of loops shall be recorded per street.
Payment is contingent upon submittal of quantities in a per street format.

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