Entrance matting sits squarely in the accessible route, so it has to meet the same surface rules as the floor around it. Here's the short checklist we design every ALUEK system against.
Openings: the ½-inch sphere rule
Openings between rails must not pass a ½-inch (13 mm) sphere, and elongated openings should run across the direction of travel — protecting wheelchair casters, cane tips and heels.
Changes in level
Up to ¼ inch may be vertical; between ¼ and ½ inch must be beveled at no steeper than 1:2; anything more needs a ramp. A flush recess keeps the mat within these tolerances.
Firm, stable, slip-resistant — and anchored
Rigid, anchored aluminum tread rails beat loose-laid mats that curl and shift under wheels. Specify slip-resistant infills to an ANSI A326.3 DCOF target for the wet entrance condition. Remember: products aren't 'ADA certified' — compliance is achieved by the installed detail.