ASTM F Number System

The test method in ASTM E1155 covers a quantitative method of measuring floor surface profiles to obtain estimates of the floor’s characteristic FF Flatness and FL Levelness Face Floor Profile numbers (F-Numbers).

Table 4.8.5.1-ASTM E1155 method

Floor surface classification Specified overall flatness SOF F Specified overall levelness SOFL
Conventional 20 15
Moderately flat 25 20
Flat 35 25
Very flat 45 35
Super flat 60 40

Table 4.8.5.1-ASTM E1155 method

The F-Speed Reader is simply walked along the floor between the start and stop points and the data collected digitally. At the end of a survey run the data is downloaded to a handheld device and then the next run can start. When the whole of the chosen floor area is surveyed the handheld device is then connected to a laptop or PC and the survey data is downloaded to the F-Speed Reader program. At the touch of a button the data is analyzed, the overall and local F-Numbers are calculated and a results table produced.

The table illustrated is from ACI 117-10 showing different Ff and Fl classifications

Related Documents

Face F-Speed Reader

The Face F-Speed Reader

By using the F-Speed Reader, CoGri USA can quickly test your floor to the ASTM E1155 F-Number system.

F-Number runs being taken on site

The F-Speed Reader Collecting Data

The F-Speed Reader being used to collect data between the start and stop points for calculation of the overall and local F-Numbers.

Measurement Standards

TR34 4th Edition

TR34 4th Edition

The Concrete Society’s TR34 Free Movement (4th Edition) Classifications

(Current Version)

ASTM F Number System

ASTM F Number System

Surface Regularity

Surface Regularity

can be checked to ‘BS 8204-2:2003+A2:2011’ straight edge specifications SR1, SR2 and SR3

Comparison table for Free Movement Specifications

Flatness Comparisons

Comparison table for Free Movement Specifications

TR34 3rd Edition

TR34 3rd Edition

The Concrete Society’s TR34 Free Movement (3rd Edition) Classifications

(Previous Version)*

* The Concrete Society’s TR34 3rd edition was superseded by the 4th Edition in August 2013.

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