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# How far can a double 2×8 floor joist span

#### A double 2×8 floor joist has a maximum span of what?

Joists can be 2x8s placed 16″ on center without issue. Beams should be 2×10, however 2×8 can suffice in a pinch. Beams should be 2×8, although 3×8 is fine if you’re nervous about it. The beams should be placed 7 and 14 feet from the house, and the piers should be spaced 1, 7, and 13 feet apart.

#### How far apart can floor joists of size 2×8 be placed?

How much space is there between floor joists? What do I do to maintain parity? Joists with a 16-inch on-center spacing can support a load that is 1.5 times as great in linear feet as it is in depth in inches. An 8-by-2-by up to 12 feet, a 10-by-12-by-15-foot 2×12, and a 12-by-18-foot 2×12.

#### Just how far will a pair of 2x8s go?

For the most part, joists can span 1.5 times their depth in inches if they are 16 inches apart. You can use a 2×8 up to 12 feet, a 2×10 up to 15 feet, and a 2×12 up to 18 feet.

#### Does the use of double joists increase the overall span?

If you double the thickness or number of joists in a floor, for instance, you’ll be able to extend the span of your floor boards by about a quarter of a foot. If you use the same number of board feet of lumber, but double the width of the boards, the distance the joists can span increases by 80 percent to 100 percent.

#### What is the maximum load that two 2×8 floor joists can support?

More bracing and shorter spans are needed to accommodate a live load of 60 lb/ft2. The joist may only be able to span 16 feet 8 inches if it is spaced every 12 inches. It’s 16 inches, 15 feet 2 inches, and 24 inches, 13 feet 3 inches.

#### Will a 2×8 board be able to span 20 feet?

How far apart can a 2×8 ceiling joist be placed? For joist spans of 16–20 feet, using 2-by-10 lumber in any of these three qualities, the maximum joist spacing allowed is 24 inches.

#### If I were to use 2x6s for floor joists, how far apart could they be?

When used at the recommended 16 inches on center, 2-grade 26 joists can support a live load of 30 inches per square foot, allowing for a maximum span of 10 feet 9 inches. When measured in the same manner, No. -1 grade lumber can span up to 10 feet 11 inches.

#### For how many meters can a 2×8 joist be used?

For joists spaced at 16 inches on center, the rule of thumb is 1.5 times the joist depth in feet. A 28 will often span 12 feet, or 1.5 times 8 feet. However, taking everything into account, the joist span for a 28 is 712 to 166, and the rafter span is 67 to 239.

#### In a weightless state, how far can a 2×8 beam travel?

For the most part, joists can span 1.5 times their depth in inches if they are 16 inches apart. You can use a 2×8 up to 12 feet, a 2×10 up to 15 feet, and a 2×12 up to 18 feet. The span of a double 28 beam, for instance, is 8 feet.

I’m curious about the cantilevering capacity of a double 2×8 beam.
When a 2×8 is permitted to span 12 feet according to the code span tables, a 3 foot cantilever may be used. Cantilevered Trusses on Joists Cantilevers are now permitted to be up to 1/4 the joist’s backspan in length, as per the new span tables and IRC provisions.

#### What is the maximum load that two 2×8 floor joists can support?

More bracing and shorter spans are needed to accommodate a live load of 60 lb/ft2. The joist may only be able to span 16 feet 8 inches if it is spaced every 12 inches. It’s 16 inches, 15 feet 2 inches, and 24 inches, 13 feet 3 inches.

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