Asked by: Louvenia Lanchares
asked in category: General Last Updated: 16th April, 2020

How far can timber cantilever?

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).

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Likewise, how far can a beam cantilever past 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.

Similarly, how far can you cantilever a 2x8 joist? If the code span tables allow a 2x8 to span 12 feet, then the cantilever can be 3 feet.

Beside this, how far can you cantilever a 2x6?

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 deck boards 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.

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