David Bolton ADA Wheelchair Ramp Thresholds on Fire-Rated Openings: How the Height Limit and the Fire Listing Pull in Opposite Directions Two Standards, One Opening: Why Fire-Rated Doors Make ADA Threshold Selection Harder This article is for contractors, facility managers, and architects who are specifying or installing ADA-compliant w... ADA compliance accessible routes code compliance fire-rated hardware thresholds May 18, 2026