Conventional Floor Joist Framing

With any building material or product sound construc tion and installation practices must be followed to assure durability and trouble free performance.

Conventional floor joist framing.

Open web trusses with wood webbing held together with metal plates. This article teaches you how to build a floor for a house on a concrete foundation. Framing a floor using i joists. Included as a consideration for selection of joists and rafters.

This is because they are. At most home improvement centers you can also have your lumber cut to the desired specifications when you order it. Conventional construction the engineered solutions are pro vided in a prescriptive format. Wood i joists with dimension lumber top and bottom chords and osb web.

The range of values in the tables provides allowable spans for all species and grades of nominal 2 inch framing lumber customarily used in construction. Joist spans and spacing are determined by engineering that is published by the manufacturer. With respect to conventional framing 16 inches or 19 2 inches on center joist spacing i joists are 50 percent stiffer than solid sawn lumber. I joists have major advantages in high volume construction with standard layouts.

In terms of strength for simple spans an i joist series with the lowest design values pri 20 can span to within inches of the strongest solid sawn lumber joist s. These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center. This framing system can also be used for framing storage shed floors this floor framing system is typical over basements and crawl spaces.