Convert Floor Levelness Value To Inches Per 10 Feet

Finally get the inverse tangent of the decimal to find the angle in degrees.

Convert floor levelness value to inches per 10 feet. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Strangely enough if a pitch of 6 inches rise per foot is entered then the degrees generated is not 22 5º it is 26 6º. A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Horizontal vertical 96 48 32 24 19 16 14 12 10 7 9 6 8 7 8 0 7 4 6 9 6 4 6 0 5 6 5 3 5 1 4 8 4 6 4 4 4 2 4 0 3 8 inches per foot horizontal to vertical slope ratio to 1 percent slope degrees slope slope ratio.

In addition explore hundreds of other calculators addressing math finance fitness health and more. Minimum local value 24 floor levelness number. The fallacy of the straightedge method was the location of the measurement. F f and f l tolerances shall be tested in accordance with astm e 1155.

Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. Higher f l numbers indicate a more level floor and the numbers are linear so a f l of 50 is twice as level as an f l of 25. This free tile calculator estimates the total number of tiles needed to cover an area such as a floor wall or roof. Common tolerances were 1 8 inch or 1 4 inch in 10 feet.

3 1 or 3 to 1 percent slope. Elevation differences are measured every 10 feet within 72 hours after the concrete is placed and those measurements are entered into a calculation to determine floor levelness f l. Convert rise and run to the same units of measure then divide the rise by the run to find the decimal form. First floor live loads have higher requirements than second floor live loads 40 pounds per square foot vs.

F l specified overall value 25 minimum local value 18 c. Although there are no direct equivalents between f numbers and straightedge tolerances aci 302 construction of concrete floors and slabs gives the following table of approximate values. It can also account for the gap or overlap between tiles. Depending on where the measurement was made the slab may pass or fail the specified.

Actual overall f numbers shall be calculated using. An inaccessible attic space on the other hand might have a live load of only 20 psf. 18 4o inches per foot. Solve the angle of an incline by finding the rise and the run of a line.

Concrete floor slab flatness and levelness traditionally allowable tolerances of concrete floor slabs were determined by checking the slab surface with a 10 foot straightedge. How to calculate an angle in degrees given rise and run. What does a specification for a floor flatness of 1 8 inch in 10 feet equal in f numbers. Furthermore if a pitch of 3 inches rise per foot is selected then.