***GENERAL REWRITE – PLEASE READ CAREFULLY.***
This IM covers truncated domes/detectable warning systems. All truncated domes/detectable warning panels shall meet the requirements of the American with Disabilities Act (ADA), the requirements of Section 4171 of the Iowa DOT Standard Specifications and Standard Road plan MI-220.
Approved sources are listed in the Materials Approved Products Listing Enterprise (MAPLE).
Approval shall be based on the following:
1. Submit Quality Control Procedures including testing rates, test results, material type, grade, Mill Test Reports, coating type, and installation/instruction requirements.
2. Submit a two square foot truncated dome test sample. Samples shall represent a production lot.
Qualified suppliers/producers of truncated domes/detectable warning panels will be placed on the approved list in Appendix A of this IM. The DOT reserves the right to remove products from the approved list based upon failed field performance.
Truncated dome/detectable warning panels made with polymer shall meet the requirements of 4171.02.
Panels made with material other than polymer, polymer composite, cast iron or steel shall be evaluated on a case-by-case basis.
ACCEPTANCE & USE
Acceptance of Truncated dome/detectable warning panels will be on the basis of approved source listed in IM 411 Appendix A.