How To Check Floor Flatness

To find the floor flatness using f numbers you measure the elevation differences d between points on the floor one foot part on a straight line.

How to check floor flatness. F f is measured as the curvature of the floor over a 2 foot interval. You calculate the differences q between all of the adjacent d values. Move one end in a circle every 1.

Take a grid of 2 foot intervals over the entire floor and put the values through an equation and you get the f f value as an indication of the waviness of the floor. Check the bubble in the horizontal tube in the level to ensure it floats between the two vertical lines. Lay the box open side down on the floor to be checked.

It will also show you the contour of the floor. Kevin dare managing director of face consultants ltd and a member of the concrete society technical report 34 working group on floor surface regularity puts forward some important views on producing the best floor surfaces. If the bubble isn t floating between the lines.

Flatness ff measures how rough or bump the finished surface is. Floor flatness f f f f numbers depict the floor flatness or how close to planar the floor is. Move the box around to suspect areas of the floor and check for light leaks around its edges.

If the floor stays dark it is flat. The difference between flatness and levelness is illustrated in figure 3 1. Flatness guidelines are 1 8 in 6 or 3 16 in 10.

Lay a 4 to 6 foot beam level on your floor. Or you can duct tape a 10 string to the floor pull it tight tape. F f this number is used to indicate the flatness of a random traffic floor.