Concrete Floor Flatness Testing Procedure using the ASTM E1155 Standard
Concrete Floor Flatness Testing Procedure for ASTM D1155
Different locations on the floor surface are marked with straight lines. Every 300 mm along each line, point elevations are measured. An approximation to the surface profile along each measurement line is synthesized based on the elevation differences between all adjacent reading points, and its consistency with visual observation is evaluated.
All elevation differences between points separated 3 m are calculated based on the arithmetic differences between all adjacent 300-mm elevation differences. Statistical analyses of these calculated profile values are used to estimate each test section’s FL Levelness and FF Flatness. To arrive at composite F-Numbers for each test surface, the F-Numbers for each test section are combined.