This video from Face® Construction Technologies (Dipstick.com) introduced the North American concrete floor industry to the Face Floor Profile Numbering (F-Number) System. F-Numbers were adopted by the American Concrete Institute in 1990 for the specification, measurement and control of concrete flatness and levelness.

Part 1 of the video gives a brief history of how the problems with the old "straightedge specs" were recognized.

Part 2 gives more details on the shortcomings of "straightedge specs".

Part 3 reviews the development of modern floor flatness tolerances, specifically the first F-Number system for Defined Traffic floors slabs (now referred to as Fmin); the FF/FL Random Traffic F-Numbers adopted by the ACI, the Canadian Standards Association (CSA) and ASTM; the Face Floor Profileograph; and the Face Dipstick® Profiler.

Part 4 focuses on superflat floor finishing techniques and the evolution of improved equipment, products and procedures designed to produce flatter and more level concrete floors.

Visit The Flat Floor Library™ at Dipstick.com for more information on F-Numbers, sample FF / FL specifications, other concrete floor tolerances and helpful documents on flat concrete floors and concrete floor measurement.

First produced in 1988 (this is the 1991 version), this video was shown at seminars conducted by The Face Companies across North America in the late 1980s and early 90s and was provided to 1,000s of industry professionals.

The F-Number System, developed by The Face Companies in the 1970s and 80s, is recognized as one of the most important developments in the concrete floor industry of the last 50 years.

Face developed the Face Floor Profileograph in 1977 and the Dipstick Floor Profiler in 1982.

The F-Number System (and its associated instrumentation and installation procedures) was the first of two Face Companies technologies that won NOVA Awards, the highest international honor for construction innovation.

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