CATEGORY 600 SHOULDERS SECTION 603 — SIDEWALKS
603.01 Description
Construct asphalt or concrete sidewalks and sidewalk ramps. Ensure that the sidewalks and sidewalk ramps are constructed in accordance with the most recent accessibility guidelines of the Americans with Disabilities Act (ADA).
603.02 Materials
Refer to 701.02, 705.02, 708.02, and the following: Curing Materials 902.07 Form Release Compound 902.08 Portland Cement Concrete 902.10, Mix No. 13 Asphalt Mix Section 904 Welded Wire Fabric 908.05 Joint Sealer 911.01 Preformed Joint Fillers 911.02 Borrow Excavation 916.01 Common Borrow 916.01 Topsoil 920.01.01, 920.01.02 Subsoil 920.01.03, 920.01.04
603.03 Construction
603.03.01 Concrete Sidewalks.
a.Excavation. Refer to 602.03.01(a).
b.Forms.
1.Fixed Form Method. Use full depth steel or wood forms. Use forms that are straight, free from warp, and of sufficient strength to resist the pressure of the concrete. Brace and stake the forms so that they remain in both horizontal and vertical alignment. Thoroughly clean and coat forms with form release 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS compound each time they are used. Allow the concrete to set for at least 12 hours before removing the forms.
2.Slip-Form Method. Refer to 604.03.01(b), except use 603.03.01(e) for joint construction.
c.Concreting. Before placing concrete, moisten the subgrade with as much water as it can absorb. Mix the concrete according to 915.03.05. Volumetric batching and continuous mixing will be permitted. Deposit the concrete on the prepared subgrade in successive batches to the full width of the sidewalk. Thoroughly spade along the edges and tamp the entire surface area to eliminate voids. Strike off and screed the concrete to the top of the forms.
d.Finishing. Immediately after screeding and before bleed water appears, bull float the concrete to seat the coarse aggregate particles. After bull floating and waiting until bleed water has dissipated and the concrete has begun to set, float the concrete to provide a level surface and apply a broom finish. Do not plaster the surface. Use a 1/4 in. edging tool on all outside edges and all joints. On dry and/or windy days and as directed, while waiting for the concrete to set, apply a thin film of evaporation retarder according to the manufacturer’s recommendations. Do not use evaporation retarder as a finishing aid. Do not add water to the concrete at any time during any phase of the finishing operations. Immediately following texturing and edging, begin the concrete curing. Ensure an ACI Concrete Flatwork Finisher or NRMCA Concrete Exterior Flatwork Finisher is present at all times during finishing operations.
e.Joints. Place joints as specified. Tool or saw dummy joints a minimum of 3/4 in. deep. Match adjacent joints in curb or pavement. Place expansion joint material to the full depth of the concrete.
f.Cold Weather Construction and Curing. Refer to 602.03.01(h).
g.Expansion Joint Sealing. Prior to sealing, clear dirt and other foreign material from the expansion joints. Ensure that joint walls and all surfaces to which the sealing material is to adhere are surface dry for at least three hours prior to sealing. Do not seal the joints until they are acceptable to the Engineer. Ensure that the surface of the sealing compound is not more than 1/8 in. below the sidewalk surface.
603.03.02 Asphalt Sidewalks.
a.Excavation. Complete excavation, subgrade preparation, and form placement when required, as specified in 603.03.01(a) and (b).
b.Placement. Place asphalt mix as specified in 504.03.06. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
c.Compaction. Use an approved roller. In areas inaccessible to a roller, a vibrating plate compactor or hand tamping may be used. Compact the asphalt mix uniformly, starting compaction as soon as the asphalt mix can be compacted without displacement. Continue until the material is thoroughly compacted and all marks have been removed.
603.03.03 Backfill. Backfill as specified in 602.03.01(i).
603.04 Measurement and Payment
The payment will be full compensation for all excavation, backfill, disposal of excess or unsuitable material, forms, reinforcement when specified, joints, sealer, compaction, curing, finishing, and for all material, labor, equipment, tools, and incidentals necessary to complete the work. The removal and disposal of unsuitable material will be measured and paid for at the Contract unit price for Class-1A Excavation, which price includes the cost of using acceptable excavation as replacement material. When Borrow, Topsoil, or other selected backfill is specified as replacement material, payment will be made at the Contract unit price for the respective items. When existing sidewalks are removed and replaced in the same location with new sidewalks, the removal will be measured and paid for as specified in 206.04.
603.04.01 Concrete Sidewalks will be measured and paid for at the Contract unit price per square
foot of finished surface including sidewalk ramps.
603.04.02 Asphalt Sidewalks will be measured and paid for at the Contract unit price per ton for
the mixture placed.
603.04.03 Turfgrass Establishment and Turfgrass Sod Establishment will be measured and paid
for separately. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 604 — CONCRETE TRAFFIC BARRIERS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 600 SHOULDERS SECTION 604 — CONCRETE TRAFFIC BARRIERS
604.01 Description
Construct concrete traffic barriers.
604.02 Materials
Crusher Run Aggregate CR-6 901.01 Aggregate 901.01, Size No. 57 Curing Materials 902.07 Form Release Compound 902.08 Portland Cement Concrete 902.10, Mix No. 3 Portland Cement Concrete 902.10, Mix No. 6 or 420.02.04 and 902.10 PVC Pipe Section 905 Reinforcing Steel Section 908, Grade 60, Epoxy Coated Preformed Joint Fillers 911.02 Borrow Excavation 916.01 Geotextile Section 919 Reflective Delineators QPL Fusion Bonded Epoxy 917.02 Use concrete mix No. 6 to construct all concrete traffic barriers, end transitions, and footers unless otherwise specified.
604.03 Construction
Use cast-in-place construction. Excavate to the required depth and to a width that will permit the installation and bracing of forms where necessary. Remove all soft and unsuitable material, and replace it with suitable material. Properly shape the subgrade and compact it as specified in Section 208.
604.03.01 Concrete Barriers. Forming of the footer or concrete barrier may be by either the fixed
form or the slip-form method. Do not construct the footer and the barrier section monolithically.
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 763–765 of 1,113.