With a maximum live load of 30 inches per square foot, 2-grade 26 joists can span as much as 10 feet 9 inches from beam to beam when spaced at the standard 16-inch interval. Under the same conditions, No. -1 grade lumber can span 10 feet 11 inches further.

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How far can a 2×6 span for flooring?

If you’re using a 2×6 for a floor or ceiling joist, the maximum distance it can span according to the 2018 IRC is 12′-6″; for the ceiling joist, it’s 20′-8″, rafter is 18′-0″; the deck board is 24″, the deck joist is 9′-11″; and the deck beam is 8′-3″.

How far can a 2×6 deck floor joist span?

From joist to joist, the decking boards are suspended in the air. Joists must be no more than 16 inches apart if you use 5/4 decking. 2×4 or 2×6 decking can span up to 24 inches in length. Putting the joists closer together may be necessary if you plan to run the decking at an angle.

Are 2×6 strong enough for deck joists?

If the deck is low enough to the ground, you can use 2×6 joists as deck joists. Spans should not exceed 9’0″ (2.73m) when using S-P-F 2×6 deck joists at 16″ o.c. (400mm), or 9’10” (3.01m) when using 12″ spacing when using these joists (300mm).

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