2x4 Floor Joist Span

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

2x4 floor joist span.

I personally think it will be a bouncy floor. Also the type of lumber is important. Shorten the span maybe to 5 and put them 12 oc or like mac said 4 16 oc. Joist span and spacing is set by your local building code.

Bottom edges of joists must be free of wires pipes and ducts. Dead load weight of structure and fixed loads 10 lbs ft 2. Live load is weight of furniture wind snow and more. Most spans are typically 10 to 12 feet so we typically use 2x8 or 2x10.

If you use awc calculator 2x4 can span 6 2 with l360 deflection for decks 40lb ll. Use a temporary 2x4 post at the midpoint of the span to support the joist until the adhesive cures usually in 24 to 48 hours. All floor joist tables start with 2x6 lumber. Also available for the android os.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. View joist rafter tables. 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. This calculator shows 2x4 s limited to 5 8 span for eastern white pine.

2 grade of douglas fir are indicated below. Doesn t interfere with plumbing or wiring in joist bays. 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. This means that it will be hard for you to convince your planning department to approve your plans without some sort of proof that the 2x4 s are adequate.

1 ft 0 3048 m. Span calculator for wood joists and rafters also available for the android os. 1 psf lb f ft 2 47 88 n m 2. Check out this free calculator or consult floor joist span tables for what you are doing.

The depth or height of your floor joists depends on how far they can span without sagging. Maximum floor joist span for no.