2x4 Floor Joist Span Chart

1 psf lb f ft 2 47 88 n m 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. 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.

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2x4 floor joist span chart. 1 ft 0 3048 m. Also available for the android os. Joist span and spacing is set by your local building code. Spans for ceiling joists shall be in accordance with tables r802 4 1 and r802 4 2.

2 grade of douglas fir are indicated below. The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. The maximum span is measured o c. 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.

Dead load weight of structure and fixed loads 10 lbs ft 2. For other grades and species and for other loading conditions refer to the awc stjr. Table r802 4 1 ceiling joist spans for common lumber species uninhabitable attics without storage live load 10 psf l δ 240. Span calculator for wood joists and rafters also available for the android os.

The spans are based on simple span joists. Live load is weight of furniture wind snow and more. Of bearings and is based on uniformly loaded joists.