# How much overhang is allowed on a deck?

## How much overhang is allowed on a deck?

Putting a limit on how much decking can overhang. The edge of decking should never overhang more than one-third of the decking material. For your standard 5.5” decking, that is 1 ¾” overhang.

How far can I cantilever a 2×8 deck joist?

A Wood Council document (here) gives some very high-end detail about decks, but the take-away as far as cantilevers go is almost exactly the same: 400mm/16” for 2×6 or 2×8 lumber, and 600mm/24” for 2×10 or 2×12 lumber.

How far can I cantilever a deck beam?

The American Wood Council’s Wood Frame Construction Manual states that beams can generally cantilever up to 1/4 their span over a post. This design criterion is generally limited to beams supporting equivalent joist lengths in its span as in it’s cantilevered sections.

### How far can you cantilever a 2×12 deck joist?

The stresses in the backspan portion of the beam are considered whether there is a cantilever or not. A southern pine (2) 2×12 beam can span 8 feet when supporting joists spanning a maximum of 14 feet, and it can cantilever 2 feet beyond the posts on each side.

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.

How far can a 2×8 overhang?

Good working rule is that a cantilever should not exceed 4 times the height of the joists. 2×8= 7.25 inches high x 4 = 29 inches.

#### What is cantilever decking?

If the deck joists extend past the beam, they create a cantilever — an overhanging section of deck.

Can you cantilever a ledger board?

If your ledger board is extending past the house (becoming a cantilever), you will likely need a post in that corner to support the additional weight because it wouldn’t be supported by the house.

How far can a deck overhang without support?

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.

## How far can you cantilever a deck?

Deck Joist Cantilever Rules and Limits. The distance your joists can safely cantilever or overhang a drop beam is determined by the size of the joists, the wood type and grade of the lumber and the spacing between joists. Many building departments limit joist cantilevers to 24″ maximum.

What is the rule for a cantilever?

As a general rule, good construction practice would indicate that the maximum extension for the cantilever should be no more than twice the depth of the joist lumber, as shown in Figure 5. As an example; an 8 inch joist should have a maximum cantilever of 8 inches and a 10 inch joist should have a maximum cantilever of 10 inches.

How far is cantilever deck?

An even wiser decision would be to never exceed 3 feet of cantilever in the construction of the deck. This will result in the deck feeling solid even when one is standing over the cantilevered ends. Cantilevering more than 3 feet would be better achieved by moving up to the next larger dimensional size of beam or joist.

### What is a cantilever deck?

Cantilevering is a deck construction technique that can be used by do-it-yourselfers on almost all decks. It allows the builder to add several feet to the width of the deck without increasing the maximum span rating for the beams or the joists. This is especially true when homeowners are building bigger…