How far can a triple 2X8 beam span without support?

Using this rule, a 2×6 will span 9 feet, a 2×8 will span 12 feet, and a 2×10 will span 15 feet. As you can see, the larger the depth, the longer the span.

Table of Contents

How far can you span a 3 ply 2X8?

Dimensional Lumber Deck Beam Span Chart

	Joist Spans
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine	3-2X6	7′-1″
3-2X8	9′-5″
3-2X10	11′-9″
3-2X12	13′-8″

How far can a 2 ply 2X8 beam span?

For example, a double 2×8 beam can span 8-ft. -0 in. when the deck joists are 6 ft. long.

How far can a 2X8 joist span?

Max. Live Load 30 lbs/ft2 (1436 N/m2)

Maximum Span (ft – in)
Nominal Size (inches)	Joist Spacing Center to Center (inches)	Lumber Grade
2 x 8	12	15′ – 10″
16	14′ – 5″
24	12′ – 4″

How far can a 2×8 span for a deck?

Deck Joist Span Chart

Joist Spacing (o.c.)		16″
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir	2×6	8′-4″
2×8	11′-1″
2×10	13′-7″
2×12	15′-9″

How far can I cantilever a 2×8?

Deck Joist Cantilever Rules and Limits

Joist Spacing (o.c.)		12″
Southern Pine	2×12	4′-6″
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir	2×6	11″
2×8	1′-8″
2×10	2′-10″

How far can a 2×8 overhang a beam?

How long can a cantilever beam be?

What is the maximum span of cantilever beams? Usually, for small cantilever beams, the span is restricted to 2 m to 3 m. But the span can be increased either by increasing the depth or using a steel or pre-stressed structural unit.

How far can a 2×8 span for deck?

How far can a double 2×8 beam span?

For example, a double 2×8 beam can span 8-ft. -0 in. when the deck joists are 6 ft. long. Hereof, how far can a double 2×8 span without support?

How many beams are in a beam span?

These nine beam spans are for built-up beams made up of either 2X8, 2X10 or 2X12 dimensional lumber nailed together as either 3, 4, or 5 ply beams. For example a 3-ply 2X8 beam would use three 2X8s nailed together side by side. For help in understanding the results in the calculator, read the section above on how to read beam span tables.

How far can a floor joist beam span?

Moving from Beam Calculations to Beam Supports. So we now have adequately sized floor joists and an adequately sized floor joist beam for our 24′ X 13′ house. Our floor joist beam can span a maximum of 13′. In the table above, the widest floor beam span for 12′ of supported floor joists is 14’7″ (if using a 5-ply 2 X 12).

Can you use 2x8s for joists?

Additionally, we’ll discuss using 2x8s for joists, headers, rafters, and beams to provide an in-depth look at their structural use in your project. What Is Span? What Factors Impact How Far a 2×8 Can Span?