Load Bearing
| 2×10 Lumber | Spacing | Joists* | Rafters** |
| 2×10 Lumber | Spacing | Joists* | Rafters** |
| Southern Pine | 12” | 16’-2” | 19’-5” |
| Southern Pine | 16” | 14’-0” | 16’-10” |
| Maximum Span (ft - in) | ||
|---|---|---|
| Nominal Size (inches) | Joist Spacing Center to Center (inches) | Lumber Grade |
| 2 x 10 | 12 | 16' - 8" |
| 16 | 15' - 2" | |
| 24 | 13' - 3" | |
How much weight can 2x10 floor joists hold?
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. A live load of 60 pounds per square foot demands more support and shorter spans.
What is the longest span for floor joists?
- Joist spans up to 2.5m - no strutting required
- Joist spans 2.5m to 4.5m - provide strutting at mid-span
- Joist spans over 4.5m - provide 2 rows of strutting at third span positions
How far can a 2x10 span without support?
The length of one 2×10 joist span depends on the wood species and how far apart it is from the next 2×10. A 2×10 southern yellow pine joist can span 16 feet and 1 inch without support. A doubled 2×10 beam can span 11’ without support for a deck that is 4’ wide.
How much weight can a 2x10 beam support?
How much weight can 2x10 floor joists hold? In fact, each 2x10 will support 1,200 lbs. To be clear, spans are measured as "clear spans". Just so, how much weight can a floor joist hold? For example, a floor joist at 16” spacing's that can carry 53 pounds per linear foot would translate into a 318 pound single point load at its center.
How far can a 2x10 span without support?
How Far Can a 2×10 Beam or Header Span? A 2×10 beam – made up of two 2x10s nailed together – can span up to 11' without support beneath a deck that is 4' wide. For a more normal-sized deck, the same beam can span 8', supporting a deck that is 8' wide. You can also triple a 2×10 beam.
How far can you span a 2x10 floor joist?
A #2-2×10 joist can span between 11'-5” and 18'-0”, as a rafter between 13'-9” and 21'-7”, and as a beam 3'-6” and 13'-0” or more. The span depends on spacing, lumber species, and grade, and for a beam, the lamination thickness, as well as numerous other factors.
Can a 2x10 span 15 feet?
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.
How far can a triple 2x10 beam span?
JoistsJoist SizeSpacingSpruce or Pine fir2x1012” OC17'-3”16” OC15'-5”24” OC12'-7”2x1212” OC20'-7”8 more rows•Mar 24, 2022
Are 2x10 good for floor joist?
Common uses for 2x10s are floor joists and roof rafters. 2x10s are still the most commonly used floor joists in residential applications simply because they are still, on an individual basis, cheaper than any other option on the market.
What size lumber Do I need to span 14 feet?
What is this? A 2×6 rafter can span 14 feet 8 inches when spaced 16 inches apart with No. 1-grade southern pine lumber on a roof with a 3/12 slope or less with a maximum live load of 20 pounds per square foot and a dead load of 15 psf.
What lumber will span 16 feet?
What size floor joist to span 16 feet:- as per general rules and guideline, a 2×8 (2-by-8) size of floor joists made of southern yellow pine, graded as #1 can allows joist spans up to 16 feet for a live load of 30 pounds per square foot and dead load of 10 pounds per square foot when spaced 16 inches apart.
What size beam do I need to span 16 feet?
For a 16 foot span, you will need atleast 3-2×14 or 6×14 size of wood beam. Thus, a 3 nailed 2×14 or 3-2×14 or 6×14 wood beam can allow to span 16 feet. For a 16-foot spans, the wood beam has to be at least 14 inches in depth and 6″ in width (3-2×14) used for residential building, wood frame structure or projects.
Can a 2x12 span 16 feet?
A 2×12 (2-by-12) floor joists can span up to 23 feet 3 inches, 2×10 (2-by-10) up to 19 feet 1 inches, 2×8 (2-by-8) up to 15 feet & 2×6 (2-by-6) up to 11 feet 4 inches at 16″ spaced by using southern yellow pine graded as #1 when live load of 30 lbs/ft^2 & dead load of 10 lbs/ ft^2.
How far can a 2x10 deck beam span?
A two-ply 2×10 beam, for example, has an allowable span of just 6 feet 9 inches for a joist spanning 14 feet and 6 feet 4 inches on 16 feet. Bigger beams also mean a greater span. A 3 ply 2×10 beam can handle a span of 8 feet 6 inches for a joist spanning 14 feet and 7 feet 11 inches at 16 feet.
How big of a beam do I need to span 20 feet?
What size beam to span 20 ft:- as per general thumb rule and guidelines, a 4 nailed 2×16 or 4-2×16 or 8×16 size of wood beam can allow to span 20 ft. Thus, for a 20 foot span, you will need atleast 4-2×16 or 8×16 size of wood beam.
No. 1 and No. 2 Grade of Douglas fir and maximum span floor joists - imperial units
Maximum floor joist span for No. 1 and No. 2 Grade of Douglas fir are indicated below. Max. dead load (weight of structure and fixed loads) 10 lbs/ft2 . Live load is weight of furniture, wind, snow and more.
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Citation
Engineering ToolBox, (2009). Maximum Floor Joist Span. [online] Available at: https://www.engineeringtoolbox.com/floor-joists-span-d_1479.html [Accessed Day Mo. Year].
How far can 2x10 floor joists span?
2×10 floor joists can span up to 20’. However, this is for 12” o.c. spacing for live loads that are 30 psf. This is unrealistic because any living space or deck requires a joist that can support a 40 psf live load. Otherwise, the joists are not to code.
How long is a 2x10 joist?
If you have Spruce-pine-fir lumber, then your span changes to 13’ 7” for 16” joist spacing. Redwood can support a 2×10 joist up to 13’ – one entire foot less than Southern yellow pine. As you can see, the species of your wood matter.
How much load can a 2x10 beam hold?
A 2×10 beam is meant to hold up to 40 psf of live load and 10 psf of dead load, just like a joist. An SYP 2×10 single-ply beam can hold 144 pounds per lineal foot (plf). A double-ply beam of the same species can hold 288 plf and a triple-ply can hold 488 plf. These are for 10’ spans.
How far apart should a 2x10 joist be?
The length of one 2×10 joist span depends on the wood species and how far apart it is from the next 2×10. A 2×10 southern yellow pine joist can span 16 feet and 1 inch without support. A doubled 2×10 beam can span 11’ without support for a deck that is 4’ wide. Lengths of 2×10 joists and beams vary depending on the application you are using them ...
What is a span table?
Span tables are intended to give builders information about the appropriate size of dimensional lumber to use when constructing in certain places. A span table will, therefore, tell you the appropriate length of 2×10 to use to ensure your size of the deck, beam, or joist will support a 40 psf live load on a deck.
What is a 2x10 rafter?
A 2×10 beam, joist, or rafter is merely a part of a larger picture. While we can use span tables and calculators to determine the distance a piece of lumber can bridge before it needs more support, we also need to account for all factors that might affect that piece of wood.
How far can a 2x10 beam span?
How Far Can a 2×10 Beam or Header Span? A 2×10 beam – made up of two 2x10s nailed together – can span up to 11’ without support beneath a deck that is 4’ wide. For a more normal-sized deck, the same beam can span 8’, supporting a deck that is 8’ wide. You can also triple a 2×10 beam.
What Is Floor Joist Span and Spacing?
Floor joists sit beneath your floor and are the pieces of lumber that support the weight of everything inside your house. They are supported by a beam, or beams, which are planted in the concrete of your basement slab.
Floor Joist Code Requirements
Building code, specifically the International Residential Code, clearly dictates the allowable spans for floor joists based on lumber type and spacing. Code also outlines the type of lumber, fastening requirements, and any other requirement you would need to install a joist in a home.
Factors that Affecting Floor Joist Spacing and Span
Many factors are involved in determining how far the joist will span. As well, the spacing between joists depends on a variety of factors. The anticipated live load on the floor framing, the species of wood used, the quality of the wood, and the size of the lumber all play a role in the length and spacing of floor joists.
Typical Floor Joist Size In Residential Construction
Floor joists range from 2×8 to 2×12. It is less common to see joists that are 2×6, even though they are included in joist span tables. Older homes are more likely to use 2×6 for joist framing.
Sizing Floor Joists – Example
When sizing floor joists, you measure the distance between the faces of the supports. That means the span indicated in the table does not include the length the joist will bear on the beam, concrete block, or masonry wall on either side. Bearing is not included because the length a joist bears on a surface is dependent on the bearing surface.
Sizing Floor Joists in an Existing Home
Wonder if your floor joists are sized properly in your home? Go downstairs and have a look at your joists. This could be difficult for those with fully finished basements, although if you have a drop ceiling, you can simply push a panel up and use a flashlight to have a look.
Floor Joist Spacing: How Far Apart Are Floor Joists in a House?
Floor joists are typically 12”, 16”, or 24” apart in a home. Most common spacing for floor joists is 16” o.c.