PERF-O JOIST® pre-drilled joists are made from an I-section with holes cut out at strategic points. The pre-cut holes offer more flexibility for passing air ducts, electrical wiring and plumbing. With this product, open web HYBRID JOIST blocking or 2" x 6" strongback bracing can be easily installed. It is also possible to adjust the joists to the desired length by cutting off the ends by up to 2 feet without any danger of weakening the joists.
This brand-new product is an excellent compromise for anyone who likes working with I-joists but wants more flexibility on the construction site, as well as savings and improved performance.
The PERF-O JOIST® pre-drilled joists floor system is stocked in lengths from 10' to 26' and heights of 9-1/2", 11-7/8", 14" and 16" (other heights and lengths available by special order).
Please consult the following tables to find out what standard inventory lengths are available for each height: