Flatpass F-Number
Developed by Xcel Concrete Floor Flatness Testing, Inc. The FlatPass is an electro-mechanical device used to measure concrete surfaces for flatness. It was specially created to give instant knowledge to Concrete Contractors, Superintendents and their Concrete Finishing Crew to enable them to quickly and easily measure the FF values of their floors. It is also used to evaluate specific areas, flat or not so flat.