Contents

- 1 What size plywood is used when the joists are 16 apart?
- 2 How far will a 2×10 span at 16 on Center?
- 3 How far can a 2×6 span 16 on Center?
- 4 Should deck joists be 16 inches on center?
- 5 How far can a 2×6 span without support?
- 6 Is OSB stronger than plywood?
- 7 How far can a wood beam span without support?
- 8 How far can a 2X8 Rafter span without support?
- 9 How far can a 12 inch I joist span?
- 10 How far can u span a 2×6?
- 11 Are two 2×6 stronger than a 2×8?
- 12 How many joists do I need for a 16 foot deck?
- 13 How far can a 2×4 span without support?
- 14 Do I need blocking between joists?

## What size plywood is used when the joists are 16 apart?

The recommended thickness of the plywood subfloor is governed by the spacing of the joists. Some experts suggest that 15/32-inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less, but slightly thicker 3/4-inch plywood should be used for joists spaced further apart.

## How far will a 2×10 span at 16 on Center?

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 far can a 2×6 span 16 on Center?

2-grade 2×6 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.

## Should deck joists be 16 inches on center?

How far apart should deck joists be spaced? Deck joists are typically spaced either every 12 inches or 16 inches on center. The maximum joist spacing you can use will depend on the size and allowable span of your joists.

## 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 2×6 can span is determined by the species, grade, location, use, load, and spacing. Based on building codes, a 2×6 can span anywhere from 2′-1” to 20′-8” depending on the affecting factors.

## Is OSB stronger than plywood?

Wood fiber is used more efficiently in osb. Osb is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood. This is one of the reasons osb is used for webs of wooden I-joists.

## How far can a wood beam span without support?

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.

## How far can a 2X8 Rafter 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 16” centers. In general, a 2×8 will span 1.5 x 8, so 12-feet.

## How far can a 12 inch I joist span?

You can go up to 17 feet, 9 inches if you use 9-12 inch-deep joists that are 12 inches on-center.

## How far can u span a 2×6?

A 2×6 joist can span anywhere between 8′ for Cedar and Redwood to 9′ for Pine and Fir at 16″ OC. 12″ OC yields longer spans, while 24″ OC allows shorter spans. For other types of framing, such as composites, you will find the information on manuals and guidelines that the manufacturers will give you.

## Are two 2×6 stronger than a 2×8?

In bending, a joist composed of two 2×6’s (true dimension 1.5 inches x 5.5 inches) are slightly stronger than a single 2×8 true dimensions 1.5 inches by 7.25 inches.

## How many joists do I need for a 16 foot deck?

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

## How far can a 2×4 span without support?

How far can I cover a 2×4? 2×4 is suitable when the range is less than 5 feet. If the span was 4 or 5 feet (maximum) before being supported by a joist, a 2×4 should be fine. Because the detour would be short because the curls are so short.

## Do I need blocking between joists?

According to the IRC, joist blocking is only necessary if your joists have a depth greater than 12”. Therefore, for most houses, you are not required to have blocking or bridging if you have traditional lumber joists that are 2” in thickness and up to 12” in width as long as both ends are fastened properly.