SECTION 608 - SIDEWALKS
608.01 Description This work shall consist of furnishing all materials for and
constructing sidewalks of either Hot Mix Asphalt (HMA) pavement, brick or concrete, and curb ramp detectable warning plates with truncated domes, in conformance with this specification and all other applicable Contract Documents.
608.02 Materials, General All new Portland cement concrete surfaces shall have
protective coating applied in accordance with Section 515, Protective Coating for Concrete Surfaces. 608.021 Sidewalk Materials Materials for sidewalks shall meet the requirements specified in the following Sections of Division 700, Materials: Aggregate for Untreated Surface Course and Leveling Course 703 .10 B r i c k f o r P a v i n g 704.02 Preformed Expansion Joint Filler 705.01 W e l d e d S t e e l W i r e F a b r i c 709.02 Portland cement concrete shall be Class A and meet the requirements of Section 502, Structural Concrete. HMA pavement shall meet the requirements of Section 403, Hot Bituminous Pavement. New aggregate required to build new sidewalk shall meet the requirements of Standard Specification 703.06(b), Aggregate for Base and Subbase, Type D. New aggregate for regrading existing sidewalk shall meet the requirements of Section 703.10, Aggregate for Untreated Surface Course and Leveling Course. Standard compacting will be required for all sidewalk areas where six inches or more of new or disturbed aggregate is placed. Where less than six inches is placed, compaction will be achieved by use of a plate compactor, hand tamp or other means approved by the Resident. 608.022 Detectable Warnings Materials Detectable warning plates shall be new cast iron, as manufactured by one of the manufacturers listed on Department’s Qualified Products List of Detectable Warning Plates. Each plate shall match the width of the ramp, unless otherwise indicated in the Contract Documents, and shall have a natural finish. Prior to starting this work, the Contractor shall submit to the Department the name of the selected supplier, the manufacturer’s literature describing the product, installation procedures, and 6-34 routine maintenance requirements. Concrete shall meet the requirements of Section 608.021, Sidewalk Materials, of this specification.
608.03 Sidewalk Construction
608.031 Portland Cement Concrete Sidewalks
a.Excavation Excavation shall be to the depth and width that will permit the installation and bracing of the forms. The foundation shall be shaped and compacted to a firm even surface conforming to the section shown in the Contract Documents. All soft and yielding material shall be removed and replaced with acceptable material.
b.Forms Forms shall be of wood or metal and shall extend for the full depth of the concrete. All forms shall be true, free from warp and of sufficient strength to resist the pressure of the concrete without springing. Bracing and staking of forms shall be such that the forms remain in both horizontal and vertical alignment until their removal.
c.Placing Concrete The foundation shall be thoroughly moistened immediately prior to placing the concrete. The proportioning, mixing and placing of the concrete shall be in accordance with the requirements of Section 502, Structural Concrete.
d.Finishing The sidewalk surface shall receive a float finish, in accordance with Section 502, Structural Concrete. Additionally, a light broom finish shall be applied, perpendicular to the sidewalk. No plastering of the mortar will be permitted. All outside edges of the slab and all joints shall be finished with a sidewalk edging tool, two inches in width, with a ¼ inch radius lip.
e.Joints Joints shall be located as shown in the Contract Documents. Slabs shall be placed alternately and the joints coated with an approved bituminous material before placing the adjacent slab. When a concrete sidewalk is constructed adjacent to a building, retaining wall, or other fixed structure, preformed joint filler, ¼ inch thick, shall be used between the slab and the structure.
f.Curing Concrete shall be cured for at least 72 hours. Curing shall be by moist burlap or mats, or by application of a curing compound listed on the Department’s Qualified Products List. The curing compound shall be applied continuously by approved mechanical pressure spraying or distributing equipment at a rate necessary to obtain an even, continuous membrane, meeting the manufacturer’s recommendations, but at a rate of not less than 1 gallon per 200 ft2 of surface; at a minimum, two coats shall be applied using a pressurized sprayer, with the first coat being applied within 15 minutes after finishing is complete and the second coat being applied within 30 minutes of, and at right angles to, the first; hand- pump sprayers, rollers or brushes shall not be used. During the curing period, all traffic, both pedestrian and vehicular, shall be excluded. Vehicular traffic shall be excluded for such additional time as may be deemed necessary by the Resident. 6-35 608.032 HMA Pavement Sidewalk
a.Excavation Excavation shall be to the required depth and width. The foundation shall be shaped and compacted to a firm even surface conforming to the section shown in the Contract Documents. All soft and yielding material shall be removed and replaced with acceptable material.
b.Base Course Base course material shall be placed as shown in the Contract Documents and each layer thoroughly compacted.
c.Placing HMA Sidewalk Material HMA sidewalk material shall be placed on the compacted base course in two courses to provide the required depth when rolled. Compaction shall be by a power roller having a minimum total weight of 1 ton with a minimum of 65 lb/in of width of the drive roll or by satisfactory power vibratory compaction equipment. In areas inaccessible to other equipment, hand tamping will be permitted. In any case, the HMA sidewalk material shall be uniformly compacted. 608.033 Brick Sidewalk (Remove and Rebuild) This work shall consist of the following, unless otherwise indicated in the Contract Documents: Removal, storage, and disposal, as necessary, of existing brick; shaping and compacting the foundation to a firm, even surface, conforming to the section shown in the Contract Documents- all soft and yielding material shall be removed and replaced with acceptable material; regrading, compacting and furnishing of Aggregate for Untreated Surface Course and Leveling Course, as necessary; furnishing of new or re-used brick to match the existing sidewalk; furnishing and applying joint filler material (sand) and compacting with water and refilling until joint material is at the same surface as the brick; all necessary grading and restoration at the back edge of sidewalk; removal and disposal of unused materials and debris. 608.034 Brick Sidewalk Excavation shall be to the required depth and width and the foundation shaped and compacted to a firm, even surface, conforming to the section shown in the Contract Documents. All soft and yielding material shall be removed and replaced with acceptable material. 608.035 Construct Sidewalk This work shall consist of excavating the existing ground and placing and compacting new aggregate, as necessary, to build the sidewalk in the new location as shown in the Contract Documents. 608.036 Regrading Sidewalk This work shall consist of removing the existing pavement, adding and compacting new aggregate, as necessary, and regrading the gravel base to conform to the grading limits shown in the Contract Documents.
608.04 Detectable Warnings Construction New plates shall be set square with the curb
edge and the base of the truncated domes shall be set flush with adjacent surfaces to allow for proper drainage. All concrete required for detectable warnings shall be cured in accordance with Section 608.031(f), Curing, of this specification. 6-36 608.041 Existing Concrete Curb Ramps Existing concrete shall be saw-cut to a dimension 4 inches larger than the detectable warning plates. New concrete shall be placed in the resulting opening and finished, and the new plates set into the wet concrete, according to the manufacturer’s recommendations. 608.042 New Concrete Curb Ramps New concrete shall be placed and finished for the ramp, and the new plates set into the wet concrete, according to the manufacturer’s recommendations. 608.043 New HMA Pavement Ramps HMA pavement shall be saw cut and removed to provide an opening that will allow for the dimensions of the cast iron plate surrounded by an additional 4 inch border on all sides of the plate. New concrete shall be placed in the resulting opening and finished, and the new plates set into the wet concrete, according to the manufacturer’s recommendations.
608.05 Method of Measurement Construct sidewalk, regrading sidewalk, concrete
sidewalk, brick sidewalk (remove and rebuild), brick sidewalk and brick driveway aprons will be measured by the square yard of finished surface. HMA pavement sidewalks will be measured by the ton of HMA mixture placed. Detectable warning plates will be measured for payment by the square foot of actual plate area, only, not including the surrounding concrete.
608.06 Basis of Payment The accepted quantities of sidewalk will be paid for at the
Contract Unit Price per square yard for concrete sidewalk, brick sidewalk and brick driveway aprons, and per ton for HMA pavement sidewalk, complete and in place. Excavation will be paid for under Section 203, Excavation and Embankment. Base and subbase material will be paid for under Section 304, Aggregate Base and Subbase Course. HMA mixture for sidewalks will be paid for under Section 403, Hot Bituminous Pavement. Expansion joint material, joint filler, and other related items will not be paid for separately but shall be considered incidental to related Pay Items. For construct sidewalk, payment will be for excavation, new aggregate and necessary incidentals to bring the grade to pre-pave grade. For regrading sidewalk, payment will be for removing existing pavement, regrading existing gravel base and adding new material, as necessary. For brick sidewalk (remove and rebuild), payment will be for all work outlined in Section 608.033, Brick Sidewalk (Remove and Rebuild), except that any necessary excavation will be paid for under Section 203, Excavation and Embankment, any necessary base and subbase material will be paid for under Section 304, Aggregate Base and Subbase Course, and any specified HMA mixture will be paid for under Section 403, Hot Bituminous Pavement. The accepted quantity of detectable warnings will be paid for at the Contract Unit Price per square foot for all labor, materials, and equipment required to install the detectable 6-37 warning plates, complete and in place. This shall include surface preparation and removal of concrete or HMA pavement, and necessary replacement concrete. For new concrete ramps, concrete shall be paid for under related sidewalk Pay Items. Welded steel wire fabric for reinforced concrete sidewalks will not be paid for separately, but shall be included in the Contract Unit Price for reinforced concrete sidewalk. Protective coating shall be paid for under Section 515, Protective Coating for Concrete Surfaces. Payment will be made under: P a y I t e m P a y U n i t
608.07 Plain Concrete Sidewalk S q u a r e Y a r d
608.08 Reinforced Concrete Sidewalk S q u a r e Y a r d
608.10 Brick Sidewalk (Remove and Rebuild) S q u a r e Y a r d
608.15 Brick Sidewalk with Bituminous Base S q u a r e Y a r d
608.16 Brick Driveway Aprons with Bituminous Base Square Y ard
608.26 Curb Ramp Detectable Warning Field S q u a r e F o o t
608.45 Construct Sidewalk S q u a r e Y a r d
608.46 Regrading Sidewalk S q u a r e Y a r d
Referenced in this section
Sections that cite this one
Sidewalks in other states
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Source: Standard Specifications — Highways and Bridges, 2020 Edition. Pages 503–507 of 817. View official source ↗