Ceiling Joist Distance

For example the highlighted cell below shows that a 2 x 6 southern yellow pine joist with a grade of 2 and spaced 24 apart can have a maximum span of 10 feet 0 inches 10 0 if you are designing your structure to support a plaster ceiling.

Ceiling joist distance. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. To find the actual distance between the inside edges of each adjacent floor joist subtract 1 inches from either 12 or 24 inches. Once you ve located the first one the others are easier to find.

Regardless of the size or length of joists they do retain a standard spacing of 16 inches. Although 2 x 4 s are included in the official table they are not listed because it is never advised to use them. Given that 2x8s are actually 1 inches wide it works out to be 14 inches between each joist.

It covers 2 common lumber species and sizes at 20 pounds per square foot load. With some structures floor joists are required to be 12 or 24 inches apart on center. The lengths and sizes of joists vary depending on the species and quality of the lumber used.

Large room joist spacing. This ceiling joist span table is based on the 2012 irc for uninhabitable attics with limited storage. 2 x 12 s are not listed because you can span pretty much whatever you want.

Also available for the android os. 1 inch 25 4 mm 1 foot 304 8 mm 1 pound per square foot 0 0479kpa. Ceiling joists are usually installed either 16 or 24 inches on center which means roughly 16 or 24 inches apart.

The ability of the joists to support weight depends upon this spacing and 16 inches provides sufficient support for most home ceiling types. This will support a room ceiling that is 10 feet long on one side as in 10 foot by 15 foot or 10 foot by 17 foot rooms which is a standard dimension for many rooms in residential construction. For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine.