Boise Cascade is promoting its pre-stamped knock-out hole I-joists with a mailout to 10,500 industry contacts.
The move comes amid increasing demand by housebuilders, main contractors and developers for larger holes to accommodate mechanical ventilation and heat recovery systems.
A Boise spokesperson said that while holes in I-joists were not new, the pre-stamped knock-out holes in BCI joists were of great use to electricians and plumbers.
