F(l) numbers indicate levelness or tilt.

F(l) numbers indicate levelness or tilt.

• A. True
• B. False
• C. Only Roughness
• D. Only Surface Texture

Answer: (A)

F(l) numbers measure levelness, the tilt of a concrete surface. They’re part of the F-n system used for finished floor evaluation, where FL specifically represents how level the surface is over a defined length. A lower FL value means the surface is closer to level, while a higher value indicates more tilt. This is separate from roughness or surface texture, which are assessed with different metrics (R values or texture indices). So the statement is true.

F(l) numbers measure levelness, the tilt of a concrete surface. They’re part of the F-n system used for finished floor evaluation, where FL specifically represents how level the surface is over a defined length. A lower FL value means the surface is closer to level, while a higher value indicates more tilt. This is separate from roughness or surface texture, which are assessed with different metrics (R values or texture indices). So the statement is true.