31-9695-2001-3 Sidewalk Detectable Warning Surface - Copy.pdf
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- Attached to
- 2025 Milling & Paving and ADA Ramps
- Solicitation number
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- Montgomery County, Northern Cambria Borough, Pennsylvania
About this file
This document is a technical specification section (Section 09695) from PennDOT (Pennsylvania Department of Transportation) addressing Sidewalk Detectable Warning Surface (DWS) installation requirements. The specification outlines the materials, construction methods, and installation procedures for detectable warning surfaces on cement concrete sidewalk curb ramps and other designated surfaces, specifically designed to provide tactile warnings for pedestrians with visual impairments in compliance with the Americans with Disabilities Act (ADA). The specification requires DWS products to be selected from manufacturers listed in PennDOT Bulletin 15, featuring truncated domes with specific size and spacing, and a maroon color that visually contrasts with adjacent walking surfaces.
The document provides detailed guidelines for both new construction and alteration/retrofit installations, including requirements for concrete placement, manufacturer installation instructions, and specific notification procedures. Contractors must notify the PennDOT Engineering Technology and Information Division (ETI) prior to installation, providing details about the number and location of ramps where DWS will be installed. The specification also mandates protection of new sidewalk surfaces, proper concrete curing, and cleaning of the DWS using manufacturer-recommended methods. Additional technical requirements include using Class AA Cement Concrete, appropriate subbase materials, and joint sealant materials as specified in referenced sections of PennDOT standards.
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Text version
09695-1
SECTION 09695
SIDEWALK DETECTABLE WARNING SURFACE
DESCRIPTION - This work is furnishing all material, equipment tools and labor required for the placement and installation of detectable warning surfaces on cement concrete sidewalk curb ramps and other designated surfaces in order to provide tactile warning for pedestrians with visual impairments under the provisions of the Americans with
Disabilities ACT (ADA).
MATERIAL-
(a) Detectable Warning Surfaces (DWS). Provide a DWS product from a manufactures listed in PennDOT Bulletin 15 and meeting the requirements of the Americans with Disabilities Act Accessibility Guidelines
(ADAAG). Provide certification as specified in section 106.03(b)3 that the
DWS meets the following ADAAG criteria:
• General. Detectable warning surface with the surface comprised of truncated domes. Dome size and spacing as specified and as indicated on standard Drawing RC-67M.
• Surface. Slip resistant.
• Contrast. Provide a maroon DWS color, as approved by the Representative and the Municipality, that contrasts visually with adjacent walking surfaces, either light-on-dark or dark-on-light.
(b) Other Material.
• Class AA Cement Concrete - Section 704
• Subbase - Section 350
• Joint Sealant Material - Section 705.4 (a), (b) or (c)
CONSTRUCTION –
(a) General. Provide a copy of the DWS manufacturer's written installation instructions.
Install DWS plates / tiles so that there are no gaps between each plate or tile.
09695-2
Notify the PennDOT Engineering Technology and Information Division
(ETI), Mr. Robin Sukley via email at rsukley@state.pa.us or at 717-787-
6840, prior to installation of the DWS's. Provide ETI the following information: When, where and the number of ramps the DWS's will be installed. Provide Mr. Sukley with detailed follow-up information regarding the ease/ difficulty of DWS installation.
(b) New Construction. Coordinate this work with the requirements for new
Cement Concrete Sidewalks, Section 676. Follow DWS manufacturer's instructions for a cast-in-place installation at the locations indicated in accordance with the requirements of Standard Drawing RC-67M for the designated curb ramp type or other designated surface.
(c) Alteration or Retrofit Construction. Saw cut and remove the entire depth of existing concrete from the area where the DWS will be placed. Replace any disturbed aggregate subbase and compact before replacing new concrete.
Place new concrete and follow the DWS manufacturer's instructions for a cast-in-place installation.
Fill any saw cut gaps with approved joint material. Fill any gaps around the
DWS edge installation with the joint material if necessary.
(d) Protection. Protect the new sidewalk and DWS surface from pedestrian traffic until the adjoining cement concrete surfaces have properly cured and work is complete at the curb ramp location. Clean the DWS using a method recommended by the manufacturer.
END OF SECTION
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