Ceiling Joist Roof Span Calculator

1 enter joist details 1 1 span and joist spacing.

Ceiling joist roof span calculator.

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. Span calculator for wood joists and rafters also available for the android os. Flat roof joist calculator. Also available for the android os.

If this is the case with your structure use the floor joist table to determine maximum joist length load. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor. This will be slightly less than the length of the board. This is the distance between joist centres.

This demo version is fixed at 1m clear span. Joist span tables use these tables to determine lengths sizes and spacing of ceiling joists. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. In other words it is either going to be on an outside wall or somewhere on the inside.

Finally select a type of lumber. The full version allows any size. Span calculator for wood joists and rafters also available for the android os. For example if building is 24 x 24 and has trusses and the load on the roof will be for 30 lb snow load and a ceiling with no storage will total out like this.

Usually 400 450 or. The load on an outside wall with clear span trusses is exactly half the load on each wall. Enter a span for the joist. If a room is 10 inside to inside and the joists are cut 10 7 so they will bear fully on both walls then the span will be 10.

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.