191611 — Detectable Warning Surface

611.01 Description

Furnish and install detectable warning surfaces. Ensure that the detectable warning surface is in accordance with the most recent accessibility guidelines of the Americans with Disabilities Act (ADA).

611.02 Materials

Detectable Warning Surfaces Section 925 Select the detectable warning surface from the Qualified Product List (QPL) maintained by the Office of Materials Technology. Ensure that detectable warning surface materials meet certification requirements prior to use. Submit the proposed source of supply and the specific product for approval.

611.03 Construction

The detectable warning system may be either surface applied or cast in place. However, use only Type I, III, or IV detectable warning systems for new or replacement concrete installations. Install the system according to the manufacturer’s recommendations. Unless specifically addressed in the manufacturer’s recommendations, remove the existing surface texturing by grinding or other means. At a minimum, prepare the concrete surface in accordance with SSPC-SP 13. Remove all old adhesives and sealants. The detectable warning surface shall be 24 in. wide in the direction of pedestrian travel and installed for the full width of the curb ramp, landing, or blended transition. Do not bridge or overhang cracks or expansion joints. Ensure that the vertical edges of the installed system are not more than 0.50 in. above the adjacent surfaces. Place a 2:1 or flatter bevel on edges that are more than 0.25 in. above the adjacent surface. The same edge requirements apply to cut material. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS

611.04 Measurement and Payment

the Contract price for the pertinent Sidewalk item. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Detectable Warning Surfaces will be measured and paid for at the Contract unit price per square foot. The payment will be full compensation for removal and disposal of old treatments, including adhesives and sealants, reapplying, and for all material, labor, equipment, tools, and incidentals necessary to complete the work. The sidewalk on which the detectable warning surface is placed will be measured and paid for at 612 — CABLE BARRIER SYSTEM CATEGORY 600 SHOULDERS SECTION 612 — CABLE BARRIER SYSTEM

612.01 Description

Furnish and install a high-tension cable barrier system using pre-stretched cables, cable barrier transition to W-beam, and end-anchor terminal sections.

612.02 Materials

Refer to 605.02, 701.02, 705.02, 708.02, 709.02, and the following: Cable Barrier System As approved Cable Barrier System As approved Barricades for Maintenance of Traffic 104.13 Concrete Mix 2 and 6 902.10 Common Borrow 916.01 Traffic Barriers Section 918 Reflective Delineator Sheeting, Type IV 950.03 Line Post and End-Anchor Terminal Footings As specified by the manufacturer

612.03 Construction

612.03.01 Site Information. Supply the cable barrier manufacturer with soil information and

investigation needed to design the cable system line post and end-anchor footings, including any soil borings that have been provided for the project.

612.03.02 Cable Barrier System. Provide a cable barrier system that has a maximum dynamic

deflection upon vehicular impact not to exceed 9 ft, and which does not encroach on the opposing traffic shoulder or place a roadside obstruction in the deflection zone. At locations where the dynamic deflection distance is not achievable, decrease the post spacing according to the manufacturer’s engineered calculations to not exceed the required deflection.

612.03.03 Working drawings and calculations. Provide working drawings and calculations for

the design of line post and end-anchor footings, based on the site-specific soil conditions. Calculate the deflection and post spacing according to the manufacturer’s recommendations, signed by a licensed engineer in the State of Maryland, and submit for Administration’s review as specified in TC-4.01. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS