# Question: What Size Beam Will Span 20 Feet?

## What size board can span 20 feet?

Beam depths are typically 5 1/2 inches, 7 1/4 inches, 9 1/4 inches, 11 1/4 inches, 11 7/8 inches, 14 inches, 16 inches, 18 inches, and 20 inches….What size beam do you need for a 20 foot span?Maximum Span (ft – in)Nominal Size (inches)Joist Spacing Center to Center (inches)Lumber Grade2 x 122413′ – 2″2 x 141220′ – 10″1618′ – 0″May 14, 2020.

## How far can a triple 2×12 beam span?

14 feetof 14 feet for a triple 2×12. Click to see full answer.

## How far can a 2×12 span without support?

How far can a 2×12 beam 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 2×12 beam can span 12 feet; a (2) 2×10 can span 10 feet and so on.

## How far can you span a LVL beam?

sixty feetMeasure your total span between members and ensure that it is not greater than 60 feet. Because of transport limitations, the maximum standard length for manufactured beams is sixty feet.

## How far can a 2×6 span without support?

How far can a 2×6 Rafter span without support? The table states that 2 X 6 rafters spaced 16 inches on center (o.c) can span a maximum distance of 13 feet 5 inches. Another option are 2 X 8 rafters spaced 24 inches o.c.

## How far can a triple 2×6 beam span?

A triple 2×6 beam over a span of 10′ feet should be more than sufficient for normal deck loads. Maximum span for a single 2×6 #2btr yellow pine is around 9′ feet. So YES you should be fine with triple 2×6..

## How much weight can a 2×12 beam hold?

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

## How big of a beam do I need to span 30 feet?

For a single 30′ beam, you can plan for a W12x40 (it’s 12″ deep x 8″ wide and weighs 40 pounds per foot). If you add the two posts, you can plan for a W4x13 (it’s 4″ deep x 4″ wide and weighs 13 pounds per foot).

## How far can a 4 ply 2×12 beam span?

Look at the table along the row for 12′ of supported length. You will see that a 4-ply, 2 X 12 can span a maximum of 13′ while supporting 12′ joists on either side of it.

## How big of a beam do I need to span 12 feet?

2 grade, there is a method that can be used for estimating beam spans for a preliminary design. 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 2×12 beam can span 12 feet; a (2) 2×10 can span 10 feet and so on.

## How far can a 4×6 beam span without support?

A Redwood 4×6 beam should span no more than 6′ between supporting posts.

## Can a 2×10 span 20 feet?

Douglas fir 2-by-10 joists graded as “Structural Select” allows joist spans up to 21 feet for a live load of 30 pounds per square foot when spaced 12 inches apart, 19 feet 1 inch for 16 inch spacing and 16 feet 8 inches for 24 inch spacing.

## What size beam do I need to span 24 feet?

You’ll need at least a 12″ (nominal) I-joist or an engineered floor truss to span that far, or you’ll need an LVL or steel beam midway.

## How far can a 4×4 span without support?

A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet. The larger the deck, the larger the joists. For best results, refer to our wood and composite deck joist span table.

## How far can a 8×12 beam span?

A 6 x 8 will span 12′ for flooring. Even with your light load, you are pushing at 20′ plus the uplift and side shear for the wind.

## What size beam do I need to span 15 feet?

In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet.

## How far can a 4×12 beam span without support?

As long as you have the physical strength, it may be possible to lift support beams that are up to 10 feet long.