Ceiling Joist Roof Span Calculator

Span calculator for wood joists and rafters also available for the android os.

Ceiling joist roof span calculator. The full version allows any size. 1 enter joist details 1 1 span and joist spacing. 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. Span calculator for wood joists and rafters also available for the android os.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor. If this is the case with your structure use the floor joist table to determine maximum joist length load. This will be slightly less than the length of the board.

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. Flat roof joists. Also available for the android os. 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 demo version is fixed at 1m clear span. The load on an outside wall with clear span trusses is exactly half the load on each wall. This is the distance between joist centres. Enter a span for the joist.

Flat roof joist calculator. In other words it is either going to be on an outside wall or somewhere on the inside. Also available for the android os. Joist span tables use these tables to determine lengths sizes and spacing of ceiling joists.

Finally select a type of lumber.