Ceiling Joist Support Beam Span

This will support a room ceiling that is 10 feet long on one side as in 10 foot by 15 foot or 10 foot by 17 foot rooms which is a standard dimension for many rooms in residential construction.

Ceiling joist support beam span.

Although 2 x 4 s are included in the official table they are not listed because it is never advised to use them. Sixteen inch oc spacing of ceiling joists made from 2 southern pine allows for a maximum 13 inch span length. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. View joist rafter tables. While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator. This ceiling joist span table is based on the 2012 irc for uninhabitable attics with limited storage.

Large room joist spacing. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.