Floor Levelness Chart

They are calculated using the standards set forth in astm e1155 which is the standard test method for determining f f floor flatness and f l floor levelness numbers the american concrete institute indicates acceptable ranges for flatness and levelness in aci 302 1 guide.

Floor levelness chart. What does a specification for a floor flatness of 1 8 inch in 10 feet equal in f numbers. Measurements over a floor system to evaluate the surface s general degree of levelness using the u s. The following appendix is a discussion on floor flatness measurement methods and is provided for general information only 01 history of flatness and levelness measurement of concrete substrate surfaces to receive flooring. The higher the f number the flatter or more level the floor.

4 2 this standard does not purport to address all of the safety concerns if any associated with its use. It is the responsibility of the user of this standard to establish. F numbers provide architects and contractors a method of determining the flatness and levelness of a concrete floor slab. F numbers were developed in the 1980s to provide a systematic quantitative way to indicate the flatness and levelness of a concrete floor.

Customary system uscs of units in inches. Floor levelness tolerances evaluate the effect of different construction methods on resulting floor surface flatness and levelness and investigate the curling and deflection of floor surfaces. For over 50 years concrete floor surface tolerances were typically measured and described by the maximum gap allowed under a 3000 mm 10 foot long straightedge.