How far can a 2x10 span for a deck?

Asked By: Jordina Usar | Last Updated: 26th April, 2020
Category: business and finance construction industry
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Deck Joist Spacing
How do I keep them even? In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet.

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Also question is, how far can a 2x10 span without support?

When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on.

Additionally, how far can you span deck posts? 8 feet

Also question is, how far can I cantilever a 2x10?

Joist Cantilevers According to the new span tables and IRC provisions, cantilevers can extend up to one-fourth the backspan of the joist. This means that joists, such as southern pine 2x10s at 16 inches on-center, spanning 12 feet are allowed to cantilever up to an additional 3 feet (see illustration, below).

What size lumber can span 20 feet?

Re: 20 foot clearspan beam size In that case, you need something like a 12-16" GLULAM or LVL to span the 20' and can use simple 2x8-10 dimensional lumber 16"OC as floor joists.

39 Related Question Answers Found

What size board can span 20 feet?

Max. Live Load 30 lbs/ft2 (1436 N/m2)
Maximum Span (ft - in)
Nominal Size (inches) Joist Spacing Center to Center (inches) Lumber Grade
2 x 10 12 20' - 3"
16 18' - 5"
24 15' - 0"

How far can a 2x8 span without support?

In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. The larger the deck, the larger the joists.

How much weight can a 2x8 joist hold?

some of it gets pretty technical in nature, and mostly relates to pounds / square foot of loading. 2x6s are generally used for ceiling joists, esp since you said 24" oc and reallllly short spans only (5 or 6 feet ). Most floor loads would be a minimum of 2x8 @ 16" oc and most preferbaly 2x10.

How much weight can a 2x10 floor support?

In fact, each 2x10 will support 1,200 lbs. To be clear, spans are measured as "clear spans". That is to say, from face of support to face of support. Also, if your BBQ is located in the middle of the span so that people can stand around the BBQ, then there will be an additional "Live Load" acting on the joists.

How much weight can a 2x10 plank support?


One 2x12 can support about 180 lbs. per foot or about 2,100 lbs. total for a 12' span.

How far can a triple 2x6 beam span?

A triple 2x6 beam over a span of 10' feet should be more than sufficient for normal deck loads.

What is the maximum span of a 2x10 floor joist?

Joist Spans
Spaced at 12 inches, the joist may only span 16 feet 8 inches. At 16 inch spacing, 15 feet 2 inches and 13 feet 3 inches at 24 inch spacing. Use a joist span table such as those found in the Resources section to determine the maximum 2-by-10 joist spans for other species and lumber grades.

How do you size a load bearing beam?

Multiply the loading per square foot by the area in square feet of the surface which the beams will be supporting. Divide by the number of beams which will be installed to get the loading per beam.

How far can a 2x8 joist cantilever?

If the code span tables allow a 2x8 to span 12 feet, then the cantilever can be 3 feet.

How far can I cantilever a 2x8?


Deck Joist Cantilever Rules and Limits
Joist Spacing (o.c.) 24"
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir 2x6 1'-2"
2x8 2'-2"
2x10 2'-9"
2x12 3'-3"

How far can you cantilever a 2x6 joist?

Looking at the table below, we see that 2x6 floor joists can be cantilevered up to 2 feet and 6 inches (2'-6") when the joists are spaced 16" apart.

What is the maximum length of cantilever beam?

Originally Answered: what is the maximum span for a cantilever beam? There is no real limitation on this. But, we usually limit it to between 2 and 2.5 m.

What is the longest span for a 2x6?

Max. Live Load 20 lbs/ft2 (956 N/m2)
Maximum Span (ft - in)
Nominal Size (inches) Rafter Spacing, Center to Center (inches) Lumber Grade
2 x 6 12 14' - 9''
16 12' - 9''
24 10' - 5''

Should you overhang deck boards?


Allow for Sufficient Overhang of Decking
A one to two inch overhang beyond the outer fascia board is sufficient. This means the installed deck boards should have at least 1.75 to 2.75” overhang before the fascia is installed.

Can 2x4 be used as deck joist?

2x4s are never ok for floor joists! 2x6 is iffy and may not meet minimum code. I agree with Marksr, that 2x6 would be minimal. Use a 4x6 rather than 2-2x6's for your beam.

How many footings do I need for a deck?

For an attached 12 x 12' deck, you'll need at least 3 footings, plus at least 2 more if you're planning on building stairs with it. If your deck will be a different size, it's easy to figure out how many you'll need.