# How far can a 2x10 span for a deck?

**feet**their depth in inches. A 2x8 up to 12

**feet**; 2x10 to 15

**feet**and 2x12 to 18

**feet**.

Also question is, how far can a 2x10 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 2x12 beam can span 12 **feet**; a (2) 2x10 can span 10 **feet** and so on.

Also question is, how far can I cantilever a 2x10?

Joist **Cantilevers** According to the new span tables and IRC provisions, **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).

Re: **20** foot clearspan beam **size** In that case, you need something like a 12-16" GLULAM or LVL to **span** the **20**' and **can** use simple 2x8-10 dimensional **lumber** 16"OC as floor joists.