# Question: What Size Beam Do I Need To Span 12 Feet?

## How do I know what size beam I need?

The formula for the section modulus is beam width times beam depth squared divided by 6.

A two 2-by-6 standard beam has actual dimensions of 1.5-by-5.5 inches which would give a section modulus of 1.5 x 5.5 x 5.5 / 6 = 7.6 which is not enough for this example.

A 2-by-8 beam would be sufficient..

## What is the maximum span for a 4×6 beam?

Obviously, the larger the beam, the greater the distance it can span between posts. A Redwood 4×6 beam should span no more than 6′ between supporting posts.

## Can floor joists span 24 feet?

2. Spans are clear distances between supports, and are based on composite action with glued-nailed APA Rated® sheathing or Sturd-I-Floor® panels of minimum thickness 19⁄32 (40/20 or 20 o.c.) for joist spacing of 19.2 or less, or 23⁄32 (48/24 or 24 o.c.) for a joist spacing of 24.

## Is a 4×6 stronger than 2 2×6?

A 4×6 joist is theoretically stronger than a doubled 2×6 joist because it’s 1/2″ thicker, but the actual strength depends upon the knots and other inherent weaknesses of any particular piece of lumber (#2 lumber can have some nasty spike knots or large not-so-tight round knots or wane).

## How much weight can a 2×12 support horizontally?

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 14 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 2×10 ceiling joist span without support?

Joist spacing of 24 inches is allowed for spans between 16 to 20 feet using 2-inch by 10-inch lumber of these three grades.

## How far can a 4×6 beam span for swing set?

12 footAssuming no major defects, and using #2 graded southern yellow pine in wet service (the least optomistic numbers), with an actual size of 3.5″ x 5.5″ (typical of planed “4×6”) a 415 lb load at the middle of (aka point loading) the 12 foot span should be safe.

## Can you remove a portion of a load bearing wall?

You can remove either type of wall, but if the wall is load bearing, you have to take special precautions to support the structure during removal, and to add a beam or other form of support in its place. … Ceiling or floor joists that are spliced over the wall, or end at the wall, mean the wall is bearing.

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

As the table shows, no 2×8’s meet the span and spacing requirements, but a 2×10 with an E of 1,300,000 psi and Fb of 1093 psi can span 15 feet 3 inches – more than enough. A 2×12 with an E of 800,000 psi and Fb of 790 psi also works, since it can span 15 feet and 10 inches.

## 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.

## How big of a beam do I need to span 20 feet?

Re: 20 foot clearspan beam size Then your floor joists only need to span 8′ between the wall and the “beam” (or between the beams). In that case, you need something like a 12-16″ GLULAM or LVL to span the 20′ and can use simple 2×8-10 dimensional lumber 16″OC as floor joists.

## How far can a 2×10 span without support?

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 LVL beam span without support?

Measure 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 6×6 beam span without support?

Each 6×6 beam only spans 12 feet, of which 2 of those feet are supported by a knee brace. So technically the beams only span 10ft.

## What size header do I need for a 16 foot span?

A minimum 3″ X 11.25″ net header size is required for opening from 6ft to a maximum 18 ft.

## What size lumber can span 24 feet?

Max. Live Load 30 lbs/ft2 (1436 N/m2)Maximum Span (ft – in)Nominal Size (inches)Joist Spacing Center to Center (inches)Lumber Grade2 x 102416′ – 8″2 x 121225′ – 7″1623′ – 3″10 more rows