Timber Floor Joist Detail

Some newer homes have manufactured i beam shaped joists.

Timber floor joist detail.

Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. Nail must provide 1 inch minimum penetration into floor joist. All the figures are based on normal domestic floor loadings where the floor construction is typically 18 25mm floor boards sheets with up to 12 5mm thick plasterboard and skim underneath.

Attach rim joist to floor joist with one nail at top and bottom. The details on this site are recommended for all i joists. Trimjoist is the marriage of an open web floor truss and a trimmable wooden i joist bringing the best features of each to the relationship. For 2 1 2 and 3 1 2 flange widths toe nails may be used.

As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. Alternatively you can download a free viewer by visiting this link and downloading the dwg trueview application. I joist construction details performance rated i joists in floor and roof framing. A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals.

If you don t have autocad you will need to sign up for a free account and use autodesk viewer a web based applications. 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.