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Trus Joist® TJI® joists are a key part of making a high-performance floor. The dimensional stability of TJI joists help them resist warping, twisting and shrinking that can lead to squeaky floors. TJI joists are lightweight and come in long lengths, which makes them faster and easier to install than traditional framing, and saves you both time and money.


  • Easily drilled and cut for plumbing and ductwork
  • Long lengths allow for versatile floor plans
  • Ease of installation helps reduce callbacks
  • TJ-Pro Rating provides customizable, predictable floor performance
  • Save time and money and increase customer satisfaction
  • Durable performance backed by a limited lifetime product warranty

Eastern Canada

Trus Joist® TJI® s31, s33 and s47 joists for use in Eastern Canada.


Weyerhaeuser offers an array of software packages to help you specify individual framing members, create cut lists, manage inventories — even to help you design a complete structural frame. Lean more about software to help get the job done.

TJ-Pro™ Rating System

When you build with TJI joists, you not only get the best product, you also get unsurpassed customer service, design expertise and engineering support. Take advantage of our industry-leading software with the TJ-Pro™ Rating System. TJ-Pro helps you design and build a floor system with Trus Joist components that work together to meet, or exceed, customer expectations.

Product Literature

  • as-tjign - Trus Joist Product Specification General Notes
  • sr-111 - Hazards of Deviating from Framing Specs
  • tj-4510 - Specifier’s Guide for TJI s31, s33, and s47 Joists – East Canada
  • tj-4035 - Sound Performance of Trus Joist TJI Joist Fire-Rated Floor Assemblies
  • tj-4000 - TJI® Joist Specifier’s Guide
  • tj-4500 - Specifier's Guide for TJI 110, 210, 230, 360, and 560 Joists - West Canada
  • tj-1020 - Preservative Treatments Approved for Trus Joist Engineered Wood Products
  • TJ-1500 - Fire-rated Assemblies and Sprinkler Systems
  • as-tji - Architectural Specifications: TJI Joists
  • tj-4510f - Guide du rédacteur de devis pour les solives TJI s31, s33 et s47 – Est du Canada Canadian
  • env-trus-joist-i-joist - Product Environmental Profile - Trus Joist I-Joists
  • env-1000 - When Is The Best Time To Make A House Green?
  • gc-003 - Green Approved Product: TJI Joist
  • 1504 - Questions and Answers About Mold
  • ENV-1002 - Terms and Tips for Environmentally Responsible Building
  • tj-9001p - Installation Guide for TJI 110, 210, 230, 360 and 560 Joists (in Punjabi language)
  • csg-tj17 - Simpson Connector Guide for Trus Joist Products
  • csg-tjcan12 - Simpson Connector Guide for Trus Joist Products
  • 5036 - USP Connector Guide for Trus Joist Products
  • tj-9006 - Installation Guide for Deep Depth TJI 360, 560 and 560D Joists
  • tj-9510 - Installation Guide for Floor and Roof Framing with TJI s31, s33 and s47 Joists – East Canada
  • 9030 - Floor Framing Standards Guide: A Framer’s Guide to the Installation Process
  • USP994-131 - USP Connector Guide for Trus Joist products (Canada)
  • tj-9001 - Installation Guide for Floor and Roof Framing with TJI 110, 210, 230, 360 and 560 Joists
  • tj-9001s - Guia de instalación para armazones de entrepisos y techos con viguetas TJI 110, 120, 230, 360 y 560
  • tj-9510f - Guide du constructeur pour les solives TJI s31, s33 s47 – Est du Canada
  • tj-9015 - Allowable Holes for Trus Joist Products
  • svc-4005 - Product Overview: TJ-Pro Ratings
  • tj-4006 - Product Overview: TJI Joists
  • tj-4030 - Trus Joist Products: The Industry’s Choice for Multi-Family and Light Commercial
  • svc-4006 - Trus Joist TJ-Pro Rating Q&A
  • 1502 - Using Weyerhaeuser Products in Conventional Construction
  • tb-825 - Solar Panel Attachment to Trus Joist TJI Joist Flanges
  • tb-827 - Wall tension tie connectors for TJI joists
  • tb-310 - Use of Topical Coatings with Weyerhaeuser Engineered Wood Products
  • tb-814 - TJI Joist Bonus Room Tables (Roof LL, 20 psf / 115%)
  • tb-813 - TJI Joist Bonus Room Tables (Roof LL, 20 psf / 125%)
  • tb-125 - Wind Uplift Design for Trus Joist TJI Roof Joists
  • tb-854 - Vent Holes for 16″ TJI 230 Joists
  • tb-929 - Proprietary Sheathing Fasteners
  • tb-824 - Trus Joist TJI Joists in Ceiling Applications
  • tb-805 - TJI Joists in Rafter Cut Applications
  • tb-815 - TJI Joist Bonus Room Tables (Roof LL, 30 psf / 115%)
  • tb-216 - Stacking Gypsum Board on Floor Framing During Construction
  • tb-112 - Moisture Effects on Weyerhaeuser Engineered Wood Products
  • tb-826 - Parallel joist blocking with end blocks
  • tb-853 - Proprietary Bridging and TJI Joists
  • tb-155 - Horizontal Diaphragm Design with Trus Joist® TJI® Joists
  • tb-156 - Weyerhaeuser Edge Gold™ Floor Panel Deflection Comparison of Two Trus Joist® TJI® Floor Joist Systems
  • tb-105 - Garage Floor Design Guidelines
  • tb-158 - Engineering Requirements for I-Joists, Structural Composite Lumber, and Plated Trusses
  • tb-120 - Engineer's Seal Requirements for I-Joists, Structural Composite Lumber and Plated Trusses
  • tb-206 - Fastener Spacing for Trus Joist Products
  • tb-818 - Flange Notches in TJI Joists
  • tb-817 - Holes Too Close to End Bearing
  • tb-820 - Connecting 3-ply TJI Joists
  • tb-206f - Espacement des attaches pour les produits en bois d’ingénierie Weyerhaeuser
  • tb-203 - Attaching Fire Sprinkler Components to Trus Joist Products
  • tb-808 - Attachment Connections to TJI Joist Bottom Flange
  • tb-155f - Calcul de diaphragmes horizontaux avec solives Trus Joist TJI
  • tb-104 - Information About Floor Performance
  • tb-315 - Preservative Wood Treatments of Weyerhaeuser Engineered Wood Products
  • TB-314 - Fire Retardant Coatings of Weyerhaeuser Engineered Wood Products
  • tb-859 - TJI® Joists with an Inadvertent Side Flange Notch in the Top (Compression) Flange
  • tb-833 - TJI® Joist 1 ½″ Web Hole Proximity Rule
  • tb-213 - Flood-Damage-Resistant Material Considerations
  • tb-860 - TJI® Joists Header-Off Span Table (Canada)
  • tb-319 - Weyerhaeuser Engineered Wood Products Header-Off Span Table
  • 1507 - Product Transportation, Handling and Storage
  • TJ-1512 - Best Practices for Product Storage & Handling
  • tj-1013 - Trus Joist No Red Tag Guarantee
  • tj-1010 - Trus Joist Product Warranty Certificate
  • tj-1006 - Trus Joist TJI Joist Warranty
  • tj-1010f - Trus Joist Product Warranty Certificate (French)
  • tj-1006f - Trus Joist TJI Joist Warranty (French)