Knockout Holes in TJI Joists

June 9, 2022 in Wood Products - #trus joist

“Knockouts” found in Weyerhaeuser TJI I-Joists are quick and convenient 1 1/2” round holes spaced 12” on center. They are perforated in to the TJI and easily removed with a hammer.

Use of these “Knockouts” do not affect placement of other holes or interfere with bearing points. These unsung heroes of the job site are great for trades looking to speed up productivity by taking the “guess work” out of hole placement.


Get the most up to date news on Weyerhaeuser products as well as technical articles written by our own professional engineers here at Weyerhaeuser to help you design, spec and build for quality, performance and savings. 


Any personal information you provide is subject to the terms of our Privacy PolicyCalifornia residents: Our California Consumer Privacy Act Notice details what personal information we collect and for what purposes.