What Is Max Span For 2x8 Floor Joists

How far can floor joists span. Click to see full answer. Most decking is not strong enough to support longer spans than 16.

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Beam and Joist Span Tables Built-Up Wood Floor Beams Supporting One Floor in a House Maximum Spans for Uniformly Distributed Loads Species and Grade Supported Built Up Beam Size Joist Length 3-2X8 4-2X8 3-2X10 4-2X10 3-2X12 4-2X12 8 9-8 11-2 11-10 13-8 13-8 15-10 10 8-8 10-0 10-7 12-2 12-3 14-2.

What is max span for 2x8 floor joists. The current floor joists are 2x8 and span the 24 feet but there is a wall mid way. 2x10 to 15 feet and 2x12 to 18 feet. 3 Stud Construction Standard Utility.

Likewise how far can a double 2x8 span without support. Ad Save Money On Low Maintenance Heavy Duty Flooring. The floor joist span tables are based on the loadings given in the amended version of BS 6399-1 which is an imposed load of either a uniformly distributed load of 15 kNm² or a concentrated load of 14 kN.

Most decks use 16 on center spacing for joists. L720 L600 L480 L360 L240 L180. 2x4 2x6 2x8 2x10 2x12.

Finally a single deck beam has a maximum span of 5 11 and double maxes out at 8 9. 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. Here are some broad rules of thumb for floor joists on 16 inch centers.

For example a double 28 beam can span 8-ft. Floor Joists Ceiling Joists Rafters Snow Load Rafters Roof Live-Load Deflection Limit. Maximum spans are inside to inside of bearings Span feet-inches Span feet-inches Span feet-inches Floor Joists - 40 psf Live Load 10 psf Dead Load L360 Deflection Floor Joists - 30 psf Live Load 10 psf Dead Load L360 Deflection 2x12 2x6 2x8 SPFs 2x6 2x8 2x10 SPFs.

A 2x8 up to 12 feet. The larger the deck the larger the joists. In general terms joists spaced 16 inches on center can span 15 times in feet their depth in inches.