What is the maximum span for a 2×6, 2×8, 2×10 & 2×12 deck joist? The maximum span for deck joists depends on several factors, including the type of wood, the spacing between the joists, and the live load (the weight the deck will need to support). Here are some general guidelines for maximum spans for common wood species (e.g., Douglas Fir-Larch, Southern Pine) and joist sizes:

1. 2×6: Typically, a 2×6 joist can span up to 10 feet for a deck with 16-inch on-center spacing between joists.

2. 2×8: A 2×8 joist can span up to 13 feet with 16-inch on-center spacing.

3. 2×10: A 2×10 joist can span up to 16 feet with 16-inch on-center spacing.

4. 2×12: A 2×12 joist can span up to 18 feet with 16-inch on-center spacing.

Please note that these are general guidelines, and it’s essential to consult local building codes and regulations, as they may have specific requirements for your area. Additionally, factors like the type of wood, grade of lumber, and the expected load (including snow loads in colder climates) can affect the allowable span.

Bringing your friends together to enjoy a beautiful summer day on your deck is a great way to unwind and relax. And while it’s important to have a deck that’s aesthetically pleasing to you, you first have to make sure it’s structurally sound and strong. That includes knowing the difference between a joist and a beam and what purpose they serve to your deck and its functionality and safety.

Deck joists are the repeated structural members that are used to build a deck frame. The minimum size joist used in deck construction depends on the distance the joists span between bearing points and the species and grade of the treated lumber used to create the joists.

A beam is the main load-bearing element for the structural soundness of your deck. It’s not only responsible for supporting the weight of the joists but other building elements as well.

The joists sit on top of a beam or are attached to a beam using joist hangers. Beams away from the house are almost always supported by vertical posts or columns. The size and construction of beams are very important and should be specified by an architect, a residential structural engineer, or the building department of your local municipality.

How Far Apart Should Deck Joists Be Spaced?, A lot of questions revolve around joists when it comes to building a deck. The normal spacing for deck joists is 16 inches on center. Some decking materials installed at a 45-degree angle to the run of the joists require the joist spacing to be 12 inches on center.

In this article we know about “what is the maximum span for a 2×6, 2×8, 2×10 & 2×12 deck joist” that will help you in better understanding and to figure out or estimate of deck joist size and their depth and help in important for you to use the right size joist.

Your joist span will depend on the size of the joists (such as 2×6, 2×8, 2×10 and 2×12). In typical deck construction, with a ledger on one end of the joist and a beam on the other, the size of the joists is driven by the size of the deck and based on the general maximum spans.

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**What is the maximum span for a 2×6, 2×8, 2×10 & 2×12 deck joist**

The maximum span for a 2×6, 2×8, 2×10 & 2×12 deck joist depending on different size of Lumber, species of wood, grade of wood, spacing between the joist, expected dead and live load of structure that coming to joist.

The maximum span for a 2×6 or 2 by 6 deck joist is 9 feet, when joist spaced 16 inches apart and made of #1 southern pine, 11 feet 10 inches span for a 2×8 deck joist, 14 feet span for a 2×10 deck joist, and 16 feet 6 inches span for a 2×12 deck joist.

**What is the maximum span for a 2×6 deck joist**

As per general thumb rules and guideline, the maximum span for a 2×6 or 2 by 6 size deck joist is 9 feet. Thus, A 2×6 size of deck joist made of #1 southern pine can span a maximum distance of 9 feet when spaced 16 inches apart. So, the maximum distance a 2×6 or 2 by 6 can span for a deck joist is 9 foot.

How Far can 2×6 Deck Joists Span? According to the IRC, a 2×6 deck joist can span anywhere **between 6′-10” and 12′-6”**. It is all based on the species of wood, grade, spacing, location and loading.

**2X6 deck joist span:-** A 2×6 deck joist made of #1 southern pine can span a maximum distance of 9 feet when spaced 16 inches on center. Span of a 2×6 deck joist depends on the wood species, grade, spacing, loading and local building code.

**What is the maximum span for a 2×8 deck joist**

As per general thumb rules and guideline, the maximum span for a 2×8 or 2 by 8 size deck joist is 11 foot 10 inches. Thus, A 2×8 size of deck joist made of #1 southern pine can span a maximum distance of 11 foot 10 inches when spaced 16 inches apart. So, the maximum distance a 2×8 or 2 by 8 can span for a deck joist is 11 foot 10 inches.

**2X8 deck joist span:-** A 2×8 deck joist made of #1 southern pine can span a maximum distance of 11 foot and 10 inches when spaced 16 inches on center. Span of a 2×8 deck joist depends on the wood species, grade, spacing, loading and local building code.

**What is the maximum span for a 2×10 deck joist**

As per general thumb rules and guideline, the maximum span for a 2×10 or 2 by 10 size deck joist is 14 feet. Thus, A 2×10 size of deck joist made of #1 southern pine can span a maximum distance of 14 feet when spaced 16 inches apart. So, the maximum distance a 2×10 or 2 by 10 can span for a deck joist is 14 foot.

**2X10 deck joist span:-** A 2×10 deck joist made of #1 southern pine can span a maximum distance of 14 feet when spaced 16 inches on center. Span of a 2×10 deck joist depends on the wood species, grade, spacing, loading and local building code.

**What is the maximum span for a 2×12 deck joist**

As per general thumb rules and guideline, the maximum span for a 2×12 or 2 by 12 size deck joist is 16 foot 6 inches. Thus, A 2×12 size of deck joist made of #1 southern pine can span a maximum distance of 16 foot 6 inches when spaced 16 inches apart. So, the maximum distance a 2×12 or 2 by 12 can span for a deck joist is 16 foot and 6 inches.

**2X12 deck joist span:-** A 2×12 deck joist made of #1 southern pine can span a maximum distance of 16 feet and 6 inches when spaced 16 inches on center. Span of a 2×12 deck joist depends on the wood species, grade, spacing, loading and local building code.

**How far can a 2×6 deck joist span**

A 2×6 or 2 by 6 deck joist made of #1 southern pine can span a maximum distance of 9 foot when spaced 16 inches apart. Thus, The maximum distance a 2×6 or 2 by 6 can span for a deck joist is 9 foot, when joist made of southern pine and spaced 16 inches apart.

**How far can a 2×8 deck joist span**

A 2×8 or 2 by 8 deck joist made of #1 southern pine can span a maximum distance of 11 foot 10 inches when spaced 16 inches apart. Thus, The maximum distance a 2×8 or 2 by 8 can span for a deck joist is 11 foot 10 inches, when joist made of southern pine and spaced 16 inches apart.

**How far can a 2×10 deck joist span**

A 2×10 or 2 by 10 deck joist made of #1 southern pine can span a maximum distance of 14 foot when spaced 16 inches apart. Thus, The maximum distance a 2×10 or 2 by 10 can span for a deck joist is 14 foot, when joist made of southern pine and spaced 16 inches apart.

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**How far can a 2×12 deck joist span**

A 2×12 or 2 by 12 deck joist made of #1 southern pine can span a maximum distance of 16 foot 6 inches when spaced 16 inches apart. Thus, The maximum distance a 2×12 or 2 by 12 can span for a deck joist is 16 foot 6 inches, when joist made of southern pine and spaced 16 inches apart.

**Conclusion:-**

The maximum span for a 2×6 or (2 by 6) deck joist made of #1 southern pine is 9 foot, when joist spaced 16 inches apart. A 2×8 deck joist can span about 11 feet 10 inches at 16″ on center. A 2×10 deck joist can span about 14 feet 0 inches at 16″ on center. A 2X12 deck joist can span about 16 feet 6 inches at 16″ on center.