Floor Joist Spacing Calculator

In the table above the widest floor beam span for 12 of supported floor joists is 14 7 if using a 5 ply 2 x 12.

Floor joist spacing calculator.

Span calculator for wood joists and rafters also available for the. While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length. Since the example house we are designing for is 12 feet wide we need to find in the floor joist span table a joist size and centering that can span 12 or wider. Dead load weight of structure and fixed loads 10 lbs ft 2.

The lowest is a plain ceiling joist with no storage 10 pounds per square foot. Live load is weight of furniture wind snow and more. 1 psf lb f ft 2 47 88 n m 2. Spacing in live load psf dead load psf exterior exposure.

The floor joist spacing is the distance between the centers of any two installed joists. Select the on center spacing for the joists. There are six choices. Most lay outs are on 16 so the field is pre selected.

Moving from beam calculations to beam supports. The highest is a fully loaded floor 70 pounds per square foot. Our floor joist beam can span a maximum of 13. 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.

Span calculator for wood joists and rafters also available for. Span calculator for wood joists and rafters available for the iphone. Choosing wood for your joists. See the image below for an example of joists spaced 16 on center 16 o c.

Spacing in exterior exposure. Joist span and spacing is set by your local building code. 2 grade of douglas fir are indicated below. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.

So we now have adequately sized floor joists and an adequately sized floor joist beam for our 24 x 13 house. 1 ft 0 3048 m. Use the joist span and spacing calculator below to plug in your desired type of wood the size of your joists and the required spacing between each joist. This is how far apart they will be.