# How far can you cantilever a deck joist?

**Joist Cantilevers**

**cantilevers can**extend up to

**one**-fourth the backspan of the

**joist**. This means that

**joists**, such as southern pine 2x10s at 16 inches on-center, spanning 12 feet are allowed to

**cantilever**up to an additional 3 feet (see illustration, below).

People also ask, how far can you cantilever a 2x8 deck joist?

**If** the code span tables allow a **2x8** 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. This means the installed **deck** boards should have at least 1.75 to 2.75” **overhang** before the fascia is installed.

Beside above, how far can you cantilever a 2x6 deck joist?

Looking at the table below, **we** see that **2x6** floor **joists can** be cantilevered up to 2 feet and 6 inches (2'-6") when the **joists** are spaced 16" apart.

How far can a beam overhang a post?

**Beams** are permitted to **cantilever** past the end **posts** up to one-quarter of the **beam** span between **posts**. I like to use this provision when sizing **beams**. Often I **can** reduce the span between **posts** slightly by cantilevering the **beam**.