Timber Floor Joist Detail

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.

Timber floor joist detail.

Ceiling joists are usually 2 by 6s or sometimes 2 by 4s if it is an older home. No more custom made floor trusses. 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. Here you can view and download individual floor and roof details for your use.

If you don t have autocad you will need to sign up for a free account and use autodesk viewer a web based applications. For 2 1 2 and 3 1 2 flange widths toe nails may be used. Some newer homes have manufactured i beam shaped joists. Nail must provide 1 inch minimum penetration into floor joist.

Floor joists are typically 2 by 8s 2 by 10s or 2 by 12s. The details on this site are recommended for all i joists. A floor s framework is made up mostly of wooden joists that run parallel to one another at regular intervals. 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.

The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. Alternatively you can download a free viewer by visiting this link and downloading the dwg trueview application.