The American Wood Council states that cantilevers are limited to **1/4 the span of the joists**. Joist Spacing (o.c.) Maximum allowable overhang cannot exceed 1/4 of the actual main span.

- If the code span tables allow a 2×8 to span 12 feet, then the cantilever can be
**3 feet**. Secondly, how far can decking overhang? Allow for Sufficient Overhang of Decking A one to two inch overhang beyond the outer fascia board is sufficient.

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

Deck Joist Cantilever Rules and Limits

Joist Spacing (o.c.) |
16″ | |
---|---|---|

Southern Pine | 2×12 | 4′-2″ |

Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir | 2×6 | 1′-0″ |

2×8 |
1′-10″ | |

2×10 | 3′-2″ |

## How far can a deck beam be cantilevered?

***Beams** may **cantilever** at each end up to ¼ of the of the actual **beam** span. For example, a 16′ **beam** span **can cantilever** a maximum of 4′.

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

Looking at the table below, **we** see that **2×6** floor **joists can** be cantilevered up to 2 feet and 6 inches (2′-6″) when the **joists** are spaced 16″ apart.

## How do you calculate cantilever on a deck?

To **determine** the maximum allowable **cantilever** for a backspan (the span from the beam to the ledger), you need to do two checks. First, find the maximum **cantilever** on the table; second, divide the backspan by four. The lower number is the maximum **cantilever** you can use. Example: A **deck** with a beam located 12 ft.

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

A **decking** board made up of 2x6s **can span** a maximum **distance** of 24 inches from joist to joist.

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

How far can a 2×6 Rafter span without support? The table states that 2 X 6 rafters spaced 16 **inches** on center (o.c) can span a maximum distance of 13 **feet** 5 **inches**.

## How far can a 2×10 beam span without support?

When supporting joists that span 12 **feet** with no overhang beyond the beam, a double ply beam can span in **feet** a value equal to its depth in inches. A double 2×12 beam can span 12 **feet**; a (2) 2×10 can span 10 **feet** and so on.

## How far can a triple 2×12 beam span?

of 14 feet for a **triple 2×12**.

## How far can a deck beam extend past a post?

The American Wood Council’s Wood Frame Construction Manual states that **beams can** generally cantilever up to 1/4 their span over a **post**.

## How far can a 2×6 span on a deck?

Decking made of 2x4s or 2x6s **can span** up to 24 inches. If you will run decking at an angle, you might need to put the joists closer together.

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

**2×6 joists** should only be used on ground-level **decks** that do not require, and will not provide for, any guards. Most **decking** is not **strong enough** to support longer spans than 16″. Some builders reduce **joist** spacing to 12″ on center to strengthen the **deck** frame or to increase maximum allowable **joist** spans.

## Can you attach a deck to a cantilever?

Chuck Lockhart A **deck** ledger cannot be **attached** to **cantilevered** house framing. **Install** a beam with posts and footings along the house end of the **deck**, just as **you would** at the outside of the **deck**. The beam **can** be built into the floor system—say a double or triple rim joist—or it **can** be placed beneath the **deck** joists.

## Are cantilever decks safe?

It is **safe** — if you build it properly. There are different forces at work here, and you must follow some special rules. Backspan. In addition to the limit on a **cantilever’s** overhang, a **deck** must also be proportioned to balance weight on its **cantilever**.

## What does cantilever mean?

(Entry 1 of 2): a projecting beam or member supported at only one end: such as. a: a bracket-shaped member supporting a balcony or a cornice.

## How many posts do I need for a 12×16 deck?

A standard **deck** will need four footings parallel to the house, but they will need to be temporarily braced by 6 inch-by-6 inch **posts**.