CATEGORY 400 STRUCTURES SECTION 401 — MAINTAINING EXISTING BRIDGE DECK DURING LIFE OF CONTRACT
401.01 Description
Patch the existing bridge deck as required for maintenance of traffic.
401.02 Materials
Rapid Hardening Cementitious Material for Concrete Pavement Repairs 902.14 Select patching material from the prequalified list of rapid hardening cementitious materials maintained by the Office of Materials Technology.
401.03 Construction
Periodically evaluate the existing deck with the Engineer to determine if any patching is necessary. Patch all holes over 1 in. deep having an area greater than 2 ft
2.Locations and limits of all patch areas shall be as approved. The Traffic Manager shall confer with the Engineer before patching begins to decide on a plan for diverting or detouring traffic. Meet all traffic safety and traffic control requirements. Areas requiring patching shall be clean and free of loose material and conform to the manufacturer’s recommendations. Protect waterways and roadways under the structure from falling debris. Do not dispose of removed material in waterways. Place patching material to the top of the existing bridge deck surfaces. Furnish and install new reinforcement when directed. When opening to traffic prior to the patch achieving sufficient strength, cover the patch with steel plates as specified in 522.03.13. Build up areas around the plates with asphalt material. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
401.04 Measurement and Payment
The payment will be full compensation for all material, labor, equipment, tools, and incidentals necessary to complete the work.
401.04.01 Patching for Maintaining Existing Bridge Deck will be measured and paid for at the
Contract unit price per square foot. The payment will also be full compensation for the removal and disposal of material required to prepare the patch area, including chipping and hand cleaning, as well as furnishing and placing reinforcing steel, forming, providing protective structures, floodlighting, and furnishing, placing, and removing any steel plates. Patches performed day or night will be paid for at the Contract unit price.
401.04.02 All work, materials, sequence of operations, equipment, protection vehicle and
channelization devices required to maintain traffic during each occurrence of patching including removal after patching is complete will be measured and paid for at the Contract unit price per each for the pertinent Maintenance of Traffic for Bridge Deck Patching Operation item. When more than one patch is made under one movement of traffic for patching, the item will be paid for only once, regardless of the number of patches made or the length of time traffic is rerouted. If traffic is maintained more than once for a particular patching operation, the work will be measured and paid for only once. 402 — STRUCTURE EXCAVATION (CLASS 3) 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 400 STRUCTURES SECTION 402 — STRUCTURE EXCAVATION (CLASS 3)
402.01 Description
Excavate and backfill for construction of bridges, box culverts, and other major structures.
402.02 Materials
Crusher Run Aggregate CR-6 901.01 Subfoundation Concrete 902.10, Mix No. 1
402.03 Construction
Sheet, shore, brace, and support all excavation contiguous to existing pavements and structures to prevent settlement, movement, or damage to the pavement or structure. Place excavated material in a manner to prevent damage to adjacent structures and incursion into waterways.
402.03.01 Backfill and Embankment Material. Use all suitable excavated material for backfill
or store for future use. Do not waste excavated material without approval. Prior to using excavated material as backfill, remove boulders, logs, and other unsuitable material. Dispose of unsuitable material in an approved disposal area.
402.03.02 Footing Elevations. The elevations for the bottom of the footings specified in the
Contract Documents are approximate only; the Engineer may direct changes in dimensions or elevations of footings to secure a satisfactory foundation during the period of construction.
402.03.03 Footing Foundations. Place footings on suitable foundations. Do not drive piles or
place concrete until the foundations are approved. Clean all rock and other hard foundation material of loose material and cut to a firm surface, either level or stepped, as directed. Clean out and grout all seams and crevices. Remove all loose and disintegrated rock and thin strata. When concrete will rest on an excavated surface other than rock, do not disturb the bottom of the excavation. Perform final removal of the foundation material to grade just prior to placement of reinforcement steel and concrete. When an item is included for Subfoundation Investigation (Section 419), use the item as directed to verify the character of the foundation. Place faces of footings plumb against undisturbed material, rock, sheeting, shoring, or forms. Faces of footings in rock shall bear against a minimum 1 ft depth of rock. If the excavation will
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 381–382 of 1,113.