# How far apart do joists need to be on a deck?

## How far apart do joists need to be on a deck?

12u2033 to 16u2033 apart

## Should I use 2×6 or 2×8 for deck joists?

You can use 2xd76 as deck joists if the deck is low enough to the ground as not to require guard railing. When using S-P-F 2xd76 deck joists, the span must not be greater than 9’0u2033 (2.73m) with joists at 16u2033 o.c. (400mm), and 9’10u201d (3.01m)with spacing at 12u2033 (300mm).

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

How Far Can 2xd76 Decking Span? A decking board made up of 2x6s can span a maximum distance of 24 inches from joist to joist.

## How many joists do I need for a 20 foot deck?

A 20-foot wide deck, for example, would require two beams: one at 10 feet and one and 20 feet in order to support a deck with 2xd78 joists spaced 16 inches apart.

16″

## How many joists do I need for a 12×12 deck?

How Far Can 2xd76 Decking Span? A decking board made up of 2x6s can span a maximum distance of 24 inches from joist to joist.

## How far apart should deck frame be?

For example, a 12-foot x 12-foot deck of 5/4 x 6 pressure treated wood decking on 16 inches on center spacing of joists will require: A 12-foot long deck with joists 16 inches on center will require 10 joists.

## Should deck joists be 2×6 or 2×8?

You can use 2xd76 as deck joists if the deck is low enough to the ground as not to require guard railing. When using S-P-F 2xd76 deck joists, the span must not be greater than 9’0u2033 (2.73m) with joists at 16u2033 o.c. (400mm), and 9’10u201d (3.01m)with spacing at 12u2033 (300mm).

## Can you use 2×8 for deck joists?

If the outside edge of your deck is at least 17u201d above grade, a double 2×8 deck beam should be installed to support the joists along the outside. The joists will then extend over the beam in a cantilever position.

## How far can you span a 2×6 deck joist?

2-grade 2xd76 joists can span up to 10 feet 9 inches from beam to beam when spaced the standard 16 inches apart with a maximum live load of 30 inches per square foot. In comparison, No. -1 grade lumber can span slightly further to 10 feet 11 inches under the same parameters.

## How far can a 2×8 deck joist span without support?

Span is determined by species, grade, dimensions, spacing, use, and load. A rule of thumb is 1.5 times a joist’s depth but in feet when spaced at 16u201d centers. In general, a 2xd78 will span 1.5 x 8, so 12-feet

## Are 2×6 strong enough for deck joists?

2xd76 deck joists are strong enough to provide a decent size deck for a few chairs and a barbeque.

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

A general rule of thumb for joist span is 1-1/2 times a board’s depth in feet, however, it’s not that simple. The distance a 2xd76 can span is determined by the species, grade, location, use, load, and spacing. Based on building codes, a 2xd76 can span anywhere from 2′-1u201d to 20′-8u201d depending on the affecting factors.

## How far can you span a 2×8 deck joist?

Span is determined by species, grade, dimensions, spacing, use, and load. A rule of thumb is 1.5 times a joist’s depth but in feet when spaced at 16u201d centers. In general, a 2xd78 will span 1.5 x 8, so 12-feet. Based on all factors though, a 2xd78 joist span is 7′-1u201d to 16′-6u201d, and a rafter 6′-7u201d and 23′-9u201d.

## What is the maximum span for deck joists?

Deck joist spacing should never exceed 16u2033 on center (with the exception of MAX deck boards, which allow for maximum 24u2033 on center). For a more rigid feel, 12u2033 or less may be preferred.

## How many deck joists do I need?

For example, when you space joists 16u2033 apart u2014 which is standard for residential decks u2014 a deck spanning 9 1/2u2032 would require 2-by-6 joists, a 13u2032 deck would need 2-by-8 joists and a 16u2032 deck calls for 2-by-10 joists.

## How do I calculate how many joists I need?

How do I calculate the floor joist that I need?

• Subtract the width of your floor joist from your floor’s length: 120x26quot; u2212 1.5x26quot; x3d 118.5x26quot;
• Divide that difference by the sum of the on-center spacing of the floor joists: 118.5x26quot; / 16x26quot; x3d 7.40625.
• Add 1 to this value and round up the answer to the next whole number:
• 30 Jun 2022

## How far can a 2×10 deck joist span?

Joist Spacing (o.c.)16x26quot;Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir2x1013′-7x26quot;2×1215′-9x26quot;Redwood, Western Cedars, Ponderosa Pine, Red Pine2x68′-0x26quot;2×810′-7x26quot;9 more rows

## How far apart do you put joists on a deck?

How Far Apart Should You Space Deck Joists? The short answer: deck joists are typically spaced either 12 inches or 16 inches apart, on center. (On-center means the length from the center of one joist to the center of the next joist, rather than a gap from edge to edge).

## How far can 2×8 deck joists span?

12u2033 to 16u2033 apart

## How much wood is needed for a 12×12 deck?

How do I calculate the floor joist that I need?

• Subtract the width of your floor joist from your floor’s length: 120x26quot; u2212 1.5x26quot; x3d 118.5x26quot;
• Divide that difference by the sum of the on-center spacing of the floor joists: 118.5x26quot; / 16x26quot; x3d 7.40625.
• Add 1 to this value and round up the answer to the next whole number:
• 30 Jun 2022

## How many joists do I need for deck?

A 12 -by-12-foot deck will need 144 lineal feet of decking. The amount of individual boards will depend upon the size and type of decking your choose and the amount of space you plan to leave between decking boards.

## What size joist do I need for a 12 foot span?

For example, when you space joists 16u2033 apart u2014 which is standard for residential decks u2014 a deck spanning 9 1/2u2032 would require 2-by-6 joists, a 13u2032 deck would need 2-by-8 joists and a 16u2032 deck calls for 2-by-10 joists.

## How far apart are deck frames?

Most decks use 16x26quot; on center spacing for joists. Most decking is not strong enough to support wider spans than 16x26quot;. Some builders reduce joist spacing to 12x26quot; on center to strengthen the deck frame or to increase maximum allowable joist spans.

## How far apart do deck joists need to be?

12u2033 to 16u2033 apart