How far can you span a 2×8 ceiling joist?

How far can you span a 2×8 ceiling joist?

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. Based on all factors though, a 2×8 joist span is 7′-1” to 16′-6”, and a rafter 6′-7” and 23′-9”.

How far can you span a 2×6 yellow pine?

10 feet – 0 inches
Joist Span Tables – Ceiling Joists For example, the highlighted cell (below) shows that a 2″ x 6″ Southern Yellow Pine joist, with a grade of #2, and spaced 24″ apart can have a maximum span of 10 feet – 0 inches (10-0), if you are designing your structure to support a plaster ceiling.

How far apart can ceiling joists be?

Ceiling joists are usually installed either 16 or 24 inches on center, which means roughly 16 or 24 inches apart.

How far can you span a yellow pine 2×10?

How Far Can a 2×10 Span Without Support? An SYP (Southern Yellow Pine) 2×10 lumber span can reach up to 14′ when used as a joist with 16” spacing. If using SPF or Redwood lumber, then the span maximum for the same distances will be half to a full foot less.

What is the maximum span for a 2×8 floor joist?

What is the maximum span for a 2×8 floor joist? In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet.

How big can a 2×8 deck joist cantilever to?

If the code span tables allow a 2×8 to span 12 feet, then the cantilever can be 3 feet.

Can I use a 2×8 for a ceiling joist and rafters?

My guess is that I would use 2×8’s for the rafter ties/ceiling joist, and also 2×8’s for the rafters. There would be interior framing inside the addition, but there would be an area of about 15 x 16 that would be clear. The pitch of the roof would be about a 4 pitch. Yes the ridge will be centered on the 16′ span.

What should the joist span be for a plaster ceiling?

Ceiling Joist Spans for Southern Yellow Pine, Douglas Fir, and Eastern Spruce. For example, the highlighted cell (below) shows that a 2″ x 6″ Southern Yellow Pine joist, with a grade of #2, and spaced 24″ apart can have a maximum span of 10 feet – 0 inches (10-0), if you are designing your structure to support a plaster ceiling.

What is the standard spacing for ceiling joists and why?

Instead, the length of the ceiling joists varies from room to room, depending on each room’s measurements. Regardless of the size or length of joists, they do retain a standard spacing of 16 inches . The ability of the joists to support weight depends upon this spacing, and 16 inches provides sufficient support for most home ceiling types.

What size lumber for ceiling joists?

The size of the ceiling joist also is accounted for in joist spacing. Although 2-inch by 6-inch lumber is used most often in ceiling construction to support 5-foot by 8-foot sheetrock — the material commonly used for ceilings — other sizes of lumber may be used, such as 2-inch by 4-inch and 2-inch by 8-inch lumber.

What is size for ceiling joist?

Though there is no standard joist size for the ceilings in all buildings, most average homes use ceiling joists in a board size of 2-by-6 inches. The range of joist sizes used in homes varies though, between 2-by-4 inches and 2-by-12 inches.

How long can floor joists span?

With these factors, the lightest joist will have a maximum span of 17 feet, 8 inches . This is the most common as the typical span is 15 feet. The heaviest joist, along with the above factors, will span a maximum of 23 feet, 8 inches .