Timber Floor Joist Detail

Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s.

Timber floor joist detail.

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. For 2 1 2 and 3 1 2 flange widths toe nails may be used. A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals. No more custom made floor trusses.

Here you can view and download individual floor and roof details for your use. Some newer homes have manufactured i beam shaped joists. Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home. 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.

As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. The details on this site are recommended for all i joists. If you don t have autocad you will need to sign up for a free account and use autodesk viewer a web based applications. Alternatively you can download a free viewer by visiting this link and downloading the dwg trueview application.

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. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction.