# Question: What Is The Longest Span For A 2×12?

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

If you have a 30-foot span, it is important to know just how long a beam you will need for support.

There is a good rule of thumb for this: divide your span (in inches) by 20.

So, if your span is 30 feet (or 360 inches) you would divide that by 20 to come to 18 feet..

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

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 6×8 beam span without support?

Simply so, how far can a 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.

## How far can a 4X10 beam span without support?

Dimensional Lumber Deck Beam Span ChartJoist SpansDouglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine4X87′-0″4X108′-4″4X129′-8″3-2X66′-5″17 more rows

## What size joist to 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 Grade2 x 82412′ – 4″2 x 101220′ – 3″1618′ – 5″10 more rows

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

A double 2×6 southern pine beam can span a maximum distance of 6 feet 8 inches when supporting joists that span 6 feet, according to International Residential Code.

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

approximately 2,100 poundsA 2×12 can hold approximately 180 pounds per foot or approximately 2,100 pounds in total.

## What size beam do I need for a 20 span?

you looking around 4×14, 4x 16 for a 20′ span. i would use a glue lam and not a solid beam ( 1 pc ). steel would be best for strength and space.

## Can a 2×4 span 10 feet?

Can a 2×4 span 10 feet? Generally, 2x4s can extend for up to 20 feet, but a number of issues have to be considered. For instance, the 2×4 would not noticeably sag under its weight at 10 feet.

## Which is stronger H beam or I beam?

The cross section of the H beam is stronger than the cross section of the I beam, meaning it can bear a greater load. In comparison, the cross section of an I beam can bear direct load and tensile but cannot resist twisting because the cross section is so narrow. This means that it can only bear force in one direction.

## How much does a 30 foot steel beam cost?

Steel Support Beam Prices By Length steel I-beam costs \$60 to \$180, while a 30 ft. steel I-beam costs \$180 to \$540 on average. H-beams can cost as much as double but are stronger, and support spans up to 3 times longer.

## What size lumber can span 20 feet?

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 ply 2×12 beam span?

13’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.

## What size beam is needed to span 22 feet?

Use one 22′ long W8x48 steel beam down the center of your 22’x28′ rectangle. This steel beam is 8.5″ deep, plus a 1.5″ deep wood nailer plate, plus 0.75″ floor sheathing, means that the floor is 10.75″ at the deepest point. Then use 2×10 joists spaced at 16″ on center spanning 14′ on each side of the steel beam.

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

14 feetof 14 feet for a triple 2×12.

## How far can a floor joist span without support?

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 much does a 20 ft truss cost?

Truss Estimator by Size & PitchSpan (in feet)Common Types*10\$30 – \$5012\$30 – \$5520\$60 – \$8024\$75 – \$956 more rows

## What size beam do I need to span 14 feet?

According the charts I have, you would need a 6×12 beam on each side to support 7680 pounds over a 14′ span (assuming you want less than a 1/360 deflection).

## How far can you span a 2×12?

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 double 2×10 span without support?

10 feetA double 2×10 can thus span 10 feet.

## How far can you SPAN 2 2×10 beam?

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