Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
ITEM 604.45 - ADJUSTING TO GRADE EXISTING CASTINGS
A. SCOPE
This work consists of adjusting castings to the new final overlay elevation as shown on the
drawings or as directed by the Engineer. Any repair needed to the existing structure within the 12
inches below the bottom of casting shall be included and performed under this item. Any further
repair needed to the existing structure shall be performed and paid under item 604.4 Repair of
Existing Structures.
B. MATERIALS AND CONSTRUCTION
This work shall include all labor, materials, equipment and transportation necessary to adjust the
existing castings to the new street or new ground surface elevation.
Mortar shall comply with NHDOT Section 707. Brick shall comply with NHDOT 604.2.4 and be
AASHTO M91 Grade SS brick. Contractor shall provide the City with material slips certifying
brick meets requirements.
Mortar shall be tooled into every vertical joint between bricks prior to installing a new horizontal
brick layer. Mortar between brick layers shall be 3/8” thick and fully cover all bricks in the layer.
Use of the weight of castings and additional brick layers to facilitate joint filling and further
spreading of mortar is not permitted. All brickwork shall be sealed on the outside and inside of
the structure with mortar. The casting frames shall be set in a thick ring of mortar extending to
the outer edge of the masonry. Mortar shall be placed on top of the bottom flange and smoothly
finished to have a slight slope that will shed water away from the frame.
All mortar shall be mixed with a cement mixer as approved by the Engineer. Mixing mortar by
hand/shovel will not be permitted.
Unless otherwise noted herein, this work shall conform to the latest approved City of Nashua
Standard Specifications for Road Construction, City of Nashua Standard Specifications for
Sewers and Drains, and the latest approved NHDOT Standard Specifications for Road and
Bridge Construction.
C. MEASUREMENT AND PAYMENT
Payment for adjusting existing castings shall be at the contract unit price specified for each. All
castings regardless of size will be paid for as one (1) each.
Contractor shall record the number and location of castings adjusted for each street. Payment is
contingent upon submittal of quantities in a per structure, and per street format.
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