Floor Joist Calculator Load

Floor joist span calculator.

Floor joist calculator load.

In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches. Apa performance rated i joists pris are manufactured in accordance with pri 400 performance standard for apa ews i joists form x720 this performance standard provides an easy to use table of allowable spans for applications in residential floor construction allowing designers and builders to select and use i joists from various member manufacturers using just one set of span. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. True floor joist span calculations can only be made by a structural engineer or contractor.

There are six choices. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. In this case your joists are adequate to support a 30 psf live load and 10 psf dead load. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000.

1 psf lb f ft 2 47 88 n m 2. The lowest is a plain ceiling joist with no storage 10 pounds per square foot. Select the on center spacing for the joists. The highest is a fully loaded floor 70 pounds per square foot.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. To use the joist span calculator below first select the species of lumber you will use for your construction project from the drop down list. Most lay outs are on 16 so the field is pre selected. 1 ft 0 3048 m.

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. 2 grade of douglas fir are indicated below. Maximum floor joist span for no.

This is how far apart they will be. Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.