What size header do I need to span 10 feet?

Author: scraper  |  Last update: Monday, July 13, 2026

For a 10-foot span, the required header size depends heavily on the load it carries. Options range from doubled 2 ×10 boards for non-load-bearing walls to triple 2 ×12 beams or engineered Laminated Veneer Lumber (LVL) beams for load-bearing exterior walls or garage doors.

What size beam for 10 foot span?

The size of a beam for a 10-foot span depends entirely on the weight it is supporting. For a standard open deck, you can typically use a double 2x8 or 2x10. For a heavy interior load-bearing wall, a structural engineered beam like a 3-1/2" x 9-1/4" LVL (Laminated Veneer Lumber) is often required.

How far can a 2x6 header span?

As a general rule, a standard double 2x6 header can safely span up to 6 feet when used as a residential window or door header. However, the exact distance relies heavily on the building's load, wood species, and local building codes.

How far can a triple 2x8 header span?

A triple 2x8 wood header typically spans between 6 to 12 feet, depending on the weight it supports, the wood species, and local building codes. For basic applications, a reliable rule of thumb is that the maximum span in feet equals the depth of the header in inches multiplied by 1.51.51.5 (e.g., 8′′×1.5=12′ max).

How far can a triple 2x12 header span load-bearing?

Generally, a triple 2x12 beam can typically span up to 14 feet with uniformly distributed loads. If the triple 2x12 beam is constructed from #2 southern yellow pine and is supported by 2x4 studs or joists spaced 16 inches apart, the maximum load capacity for an 11 ft span is approximately 9,500 lbs.

All about headers in Wall Framing - Construction Trades Training Lesson

What size header is needed for a 10 foot span?

For a 10-foot span, the required header size depends entirely on the weight it is supporting. For non-load-bearing walls, a double 2x10 is generally standard. For load-bearing exterior walls, a double 2x12 or an engineered two-ply 1.75" × 11.75" LVL (Laminated Veneer Lumber) is typically required.

How far can a 4-ply 2x12 beam span?

A 4-ply 2x12 built-up beam (which measures 7′′7 prime prime7′′ wide and 1178′′ deep) is highly dependent on its structural application, wood species, and the load it supports. Generally, it can span between 1414𝟏𝟒 to 2020𝟐𝟎 feet safely. Always verify exact measurements using your local AWC Span Tables.

Can 2x8 span 10 feet?

Example: In the joist span table below, the highlighted cell (10-5) indicates that a #2 grade 2" x 8" Douglas Fir joist, spaced 24" apart, can have a maximum span of 10 feet - 5 inches (10-5) if designing for a live load of 40 PSF, a dead load of 10 PSF, and a deflection limit of the total span in inches divided by 360 ...

Can you span 12 feet with a 2x10?

Larger joists can span across wider areas. For example, a 2x6 joist would have a 12-foot, 6-inch maximum span, and a 2x10 joist would have a 21-foot maximum span. Additionally, wood species and grading determines how far apart floor joists can be spaced.

Can you span 10 ft with a 2x6?

Yes, a 2x6 can span 10 feet, but it depends entirely on what the board is supporting.

What size beam for 14ft span?

For a 14-foot span, typical beam sizes range from a double or triple 2x12 (for light loads) to a 3.5" x 11.75" or 14" LVL (Engineered Wood). However, the exact size depends heavily on whether it supports a roof, a second floor, or just a ceiling, as well as the weight of the materials.

How far can a double 2x8 beam span without support?

A double 2x8 beam can typically span between 7 to 12 feet without support, depending entirely on the specific load it is carrying. Because its capacity varies heavily by application, always check your American Wood Council Span Calculator and local building codes for precise structural requirements.

What size joist do I need for a 10 ft span?

For a 10 foot span use 2x8 12" O.C. If you want to use 2x6 then you need a support beam in the middle. A 2x8 shouldn't spam more than 8'.

What size beam for 12 foot span load-bearing?

Indeed, a 3.5" x 9.25" LVL beam should remain stable without sagging over a 12-foot span on a bearing wall. This beam can support a load of 1190 pounds per linear foot when loaded at mid-span, which is sufficient to handle the weight of a bedroom, roof, and any potential snow or wind loads that may occur.

How far can you span a 2x8 header?

A double 2x8 header can safely span between 555 and 999 feet, depending on the number of stories it supports and the weight of your roof. Generally, the maximum clear span is 999 feet for a single-story building and drops to 777 feet for a two-story building.

Are I-joists better than solid lumber?

For commercial buildings, I-Joists are often the preferred choice due to their superior load-bearing capacity and ease of installation. Timber joists, however, may still be used in certain commercial applications where cost considerations are paramount.

What is the maximum span for a 2x8 rafter?

The maximum span for a 2x8 roof rafter typically ranges from 11 to 19 feet. The exact span depends heavily on your local building codes, wood species/grade, rafter spacing (12", 16", or 24" on-center), and roof loads (snow and dead weight).

How big of a header to span 10 feet?

For a 10-foot span, the required header size depends entirely on the weight it is supporting. For non-load-bearing walls, a double 2x10 is generally standard. For load-bearing exterior walls, a double 2x12 or an engineered two-ply 1.75" × 11.75" LVL (Laminated Veneer Lumber) is typically required.

How far can a double 2x12 header span?

A standard double 2x12 header can typically span between 6 to 16 feet, depending heavily on the supported load (e.g., roof vs. floor), the width of the building, snow loads, and the wood species.

How far can a doubled up 2x10 beam span?

A double 2x10 beam (or girder) can typically span between 10 to 14 feet between supporting posts, depending on the wood species and the weight it needs to hold. For a deck, the maximum span is usually around 10 to 11 feet. For an interior floor beam or roof, it can sometimes stretch to 12 or 14 feet.

Can a 2x10 span 16 feet?

Whether a 2x10 can span 16 feet depends entirely on how it is being used (floor joist, roof rafter, or ceiling joist), the wood species, and the spacing. While some framing configurations allow a 16-foot span, floor joists usually max out around 15 feet, so you might need to upgrade to a 2x12 or an engineered I-joist.

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