Floor Joist Spacing Calculator

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.

Floor joist spacing calculator.

Moving from beam calculations to beam supports. Dead load weight of structure and fixed loads 10 lbs ft 2. 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. The highest is a fully loaded floor 70 pounds per square foot.

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. 1 ft 0 3048 m. Span calculator for wood joists and rafters available for the iphone. 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.

Spacing in live load psf dead load psf exterior exposure. 2 grade of douglas fir are indicated below. 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. So we now have adequately sized floor joists and an adequately sized floor joist beam for our 24 x 13 house.

Our floor joist beam can span a maximum of 13. Span calculator for wood joists and rafters also available for the. Choosing wood for your joists. Span calculator for wood joists and rafters also available for.

Most lay outs are on 16 so the field is pre selected. 1 psf lb f ft 2 47 88 n m 2. The area where you live plays an important role in choosing wood for your joists. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.

There are six choices. The lowest is a plain ceiling joist with no storage 10 pounds per square foot. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started. Select the on center spacing for the joists.

Maximum floor joist span for no. The floor joist spacing is the distance between the centers of any two installed joists. This is how far apart they will be. See the image below for an example of joists spaced 16 on center 16 o c.