Tile-Paving Manufacturers' offer technical support and/or product sheets that can answer your questions regarding performance or application of proprietary products.
Ironrock Phone: (800) 325-3945
If your question is still unresolved, you have several choices to explore other means of technical support.
Situation May Require an On-Site Inspection to resolve the problem.
Installation May Require Sample Testing
Questions Regarding Handbook Guidelines or American National Standards