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

Depending on various factors, the maximum span for a 2×8 floor joist is 16′ 6”. The maximum span for roof rafters is 23′ 9”. For headers, the maximum span is 11′ 2”. Finally, a single deck beam has a maximum span of 5′ 11” and double maxes out at 8′ 9”.

## How far can something be cantilevered?

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).

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

3. Maximum cantilever (overhang) for 2″ x 8″ joists is 16″ and for 2″x 10″ joists is 24″.

## What is the maximum cantilever for a deck?

Check 1: The allowable overhang/maximum cantilever is 3 ft 5 in. per the DCA 6 table and 3 ft. 6 in. per the 2018 IRC table.

## Does joist span include cantilever?

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).

## Can I use 2×8 for deck joists?

2×8 for joists will be fine, with 16″ OC. Should use 2×10 for beams but 2×8 will be fine as well. If you are worried you can triple the 2×8 for the beams but double will be sufficient. You should put the beams at 7 and 14 feet out from the house, with the piers you should do 3 per beam with spacing of 1, 7, 13.

## How far can a 3 ply 2×8 beam span?

Dimensional Lumber Deck Beam Span Chart
Joist Spans
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine3-2X67′-1″
3-2X89′-5″
3-2X1011′-9″
3-2X1213′-8″

## How far can you cantilever 2×6?

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. The table also indicates that we need to keep the length of the joist that is not cantilevered between 4′-0″ and 6′-6″.

## Can I use 2×8 for deck boards?

Q: Can I use 2×8 treated lumber as deck boards? A: No, that’s a not a good idea. Lumber wider than 6 inches should not be used as a flat surface. Wide, flat boards have a tendency to pool rain water, which can lead to cupping problems.

## How far can a 2×8 span without sagging?

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 triple 2×8 header span?

A triple 2×8 or 6×8 size of header made of #2 grade of Douglas fir- larch can allow span upto 7 feet far distance for one floor building and upto 5 feet for 2 floor in load bearing exterior windows & door opening or interior wall when building width is no more than 20 feet wide.

## How long can a triple 2×8 span?

As per general rules and guidelines, #2 grade southern pine of a triple 2×6 deck beam can span upto 8 feet, (3) 2×10 can span 13 feet, (3) 2×8 can span 11 feet and (3) 2×12 can span 15 feet.