Ceiling Joist Spacing
Spacing should be interpreted as the centre to centre distance between adjacent parallel members.
Ceiling joist spacing. This means from the center of one upright joist to the center of the next. With some structures floor joists are required to be 12 or 24 inches apart on center. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor.
Basic ceiling joist spacing. The tables provide the following information. Dead load 5 psf.
Calculating ceiling joist spacing. The size of the ceiling joist also is accounted for in joist spacing. Ceiling joist spacing in inches 12 16 19 2 24 species and grade of lumber various lumber size options 2 4 2 6 2 8 2 10 the maximum ceiling joist span based on the lumber size species grade and spacing used.
You should check with your local building department for construction requirements in your area. Once you ve located the first one the others are easier to find. Ceiling joist spans for common lumber species uninhabitable attics without storage live load 10 psf l δ 240 ceiling joist spacing inches species and grade.
If this is the case with your structure use the floor joist table to determine maximum joist length load. Size length of ceiling joists standard size of joists. If you only need.
Maximum ceiling joist spans. Though there is no standard joist size for the ceilings in all buildings most average homes. Span calculator for wood joists and rafters also available for the.