TJI® joists are a high-tech combination of a proprietary web material called Performance Plus® and flanges made from Microllam® LVL, TimberStrand® LSL or sawn lumber.

This revolutionary product made from fast-growing aspen and yellow poplar can be used for a broad range of applications, such as rim board and window, door and garage door headers.

Microllam® laminated veneer lumber (LVL) is manufactured to minimize the effects of wood's natural defects, so it resists the bowing, shrinking and twisting that are leading causes of wall cracks.

Wood fiber on the outermost edges of the log is often wasted during the milling of sawn lumber. However, Trus Joist's award-winning Parallam® parallel strand lumber (PSL) takes full advantage of these fibers, making it stronger, straighter and longer than sawn lumber.