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# How far can a 2x8 floor joist span without support?

- How far can a 2x8 floor joist span without support?
- How far can you SPAN floor joist without support?
- What is the longest span for floor joists?
- How much weight can a 2x8 support?
- What size lumber can span 24 feet?
- How far can you cantilever a 2x8 deck joist?

## How far can a 2x8 floor joist span without support?

But first, generally, how far can a 2×8 span without support? 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”.

## How far can you SPAN floor joist without support?

The maximum distance a 2×6 can span, according to the 2018 IRC, for a floor joist, is 12'-6”, ceiling joist 20'-8”, rafter 18'-0”, deck board 24”, deck joist 9'-11”, deck beam 8'-3”, and 6'-1” as for header. Always check the codes for determining factors or consult a Structural Engineer.

## What is the longest span for floor joists?

26'A floor joist can span nearly 26' in the most extreme cases. A select douglas fir 2×12 supporting a 30 psf live load and 10 psf dead load, spaced at 12” will have the greatest span length.

## How much weight can a 2x8 support?

The weight that can be supported by a double or triple wood headerSpan (feet)Weight Supported (lb)2 x 2" x 6"3 x 2" x 8"61680469083990103190

## What size lumber can span 24 feet?

For span upto 24 feet, generally you need 4 1/2 × 11 1/4 standard size of LVL beam or 2×16 dimensional lumber at 16″ apart from centre on normal weight condition which providing great stability for your projects.

## How far can you cantilever a 2x8 deck joist?

1/4The 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.

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