Trus Joist Weyerhaeuser territory manager Steve Rudowsky guides you through the right and wrong ways to put holes in TJIs. TJI joists are very versatile when it comes to holes of many sizes, but there are a few things to keep in mind to ensure the integrity of the joist is not compromised.
This video will cover:
- Types of acceptable holes: square, round, grouped, rectangle
- Common mistakes when drilling holes in TJI joists
- Proper cutting techniques
- Allowable hole locations, and how to identify no hole zones
- Knockouts: small prepunched hole for convenient running of wires and plumbing supply lines
- Resources for calculations
The following webpages and documents provide all the information you need to correctly size, locate, and cut holes in TJI joists. If you’re still unsure after reviewing this information, reach out to your regional Trus Joist representative with questions.
- TJI JOIST SPECIFIER’S GUIDE – USA – TJ-4000
Featuring Trus Joist TJI Joists for Floor and Roof Applications
- ALLOWABLE HOLES FOR TRUS JOIST PRODUCTS – TJ-9015
A large document with drawings and guidelines for sizing and locating holes. Tip: print this out and post it on your job site for your crew and subs to refer to.
- HOLES TOO CLOSE TO END BEARING – TB-817
Repair detail and maximum span table for TJI joists with holes too close to bearing
- WEYERHAEUSER ENGINEERED WOOD PRODUCTS HEADER-OFF SPAN TABLE – TB-319
For certain situations, a typical repair detail may not be sufficient or there may not be enough room to install the required repair materials. Here are some alternate solutions.
- ForteWEB software
Perform member calculations and identifies solutions for the conditions and geometry you specify. Size members for a specific spacing, depth or the best economical fit.
- Weyerhaeuser Document Library
Find useful guides on choosing and installing all Weyerhaeuser products