Ceiling Joist Roof Span Calculator

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.

Ceiling joist roof span calculator.

Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor. This demo version is fixed at 1m clear span. Also available for the android os. 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.

1 enter joist details 1 1 span and joist spacing. Span calculator for wood joists and rafters also available for the android os. Usually 400 450 or. Also available for the android os.

Flat roof joist calculator. Enter a span for the joist. Finally select a type of lumber. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Span calculator for wood joists and rafters 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. If this is the case with your structure use the floor joist table to determine maximum joist length load. 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.

The full version allows any size. Flat roof joists. This is the distance between joist centres. The load on an outside wall with clear span trusses is exactly half the load on each wall.

This will be slightly less than the length of the board.