Welcome to Weyerhaeuser's new website!

You appear to be using an older browser. This website is best viewed using the latest versions of Internet Explorer, Chrome, Safari, and Firefox. If you proceed without upgrading or switching browsers, you may not experience optimal navigation or page functionality. Thank you for your interest in Weyerhaeuser and we hope you enjoy your visit.

Update my browser now


TimberStrand® LSL Floor Joists

For floor performance and code requirements

TimberStrand® LSL is an ideal solution, providing an alternative to solid sawn floor joists, especially where longer lengths and greater stability are required. Floors work harder these days, supporting heavy kitchen islands and great rooms. Rely on TimberStrand LSL joists to deliver the loads you require.  

TimberStrand LSL floor joists also deliver 2 x 10 fire equivalent performance required by 2012 and 2015 IBC.   

Product Literature

  • tj-9013 - Trus Joist Products Satisfy Code Fire Protection Requirements
  • ruling-no05-19-143r - Ruling No. 05-19-143 (12627-R)
  • fl6527 - State of Florida FL6527-R10
  • esr-1387 - U.S and City of LA ICC-ES Report No. ESR-1387
  • var-1008 - ICC-ES SAVE Report No. VAR-1008
  • ccmc12627-r-f - Canadian CCMC ER No. 12627-R
  • ccmc12627-r - Canadian CCMC ER No. 12627-R
  • tj-9513 - Fire Protection of Residential Floors in Canada
  • as-ts - Architectural Specifications: TimberStrand
  • as-tjign - Trus Joist Product Specification General Notes
  • tj-1020 - Preservative Treatments Approved for Trus Joist Engineered Wood Products
  • tj-9020 - Specifier's Guide for Trus Joist Beams, Headers, and Columns - Pacific Coast and Northwest
  • tj-9505 - Specifier's Guide for Trus Joist Beams, Headers, and Columns - West Canada
  • TJ-8014 - Delivering Fire Resistance and Superior Floor Performance
  • gc-004 - Green Approved Product: TimberStrand LSL, Parallam PSL, Microllam LVL
  • 1504 - Questions and Answers About Mold
  • env-1000 - When Is The Best Time To Make A House Green?
  • env-timberstrand-osb - Product Environmental Profile - Timberstrand & OSB
  • 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)
  • tj-9001 - Installation Guide for Floor and Roof Framing with TJI 110, 210, 230, 360 and 560 Joists
  • tj-9510f - Guide du constructeur pour les solives TJI s31, s33 s47 – Est du Canada
  • tj-9510 - Installation Guide for Floor and Roof Framing with TJI s31, s33 and s47 Joists – East Canada
  • tj-9001s - Guia de instalación para armazones de entrepisos y techos con viguetas TJI 110, 120, 230, 360 y 560
  • tb-310 - Use of Topical Coatings with Weyerhaeuser Engineered Wood Products
  • tb-216 - Stacking Gypsum Board on Floor Framing During Construction
  • tb-112 - Moisture Effects on Weyerhaeuser Engineered Wood Products
  • tb-305 - Resawing Microllam LVL, Parallam PSL and TimberStrand LSL Products
  • tb-315 - Preservative Wood Treatments of Weyerhaeuser Engineered Wood Products
  • tb-316 - Forklift Recommendations for Trus Joist® Structural Composite Lumber
  • tb-319 - Weyerhaeuser Engineered Wood Products Header-Off Span Table
  • TB-314 - Fire Retardant Coatings of Weyerhaeuser Engineered Wood Products
  • 1507 - Product Transportation, Handling and Storage
  • TJ-1512 - Best Practices for Product Storage & Handling
  • tj-1008 - Trus Joist TimberStrand LSL Warranty
  • tj-1013 - Trus Joist No Red Tag Guarantee
  • tj-1010 - Trus Joist Product Warranty Certificate
  • tj-1010f - Trus Joist Product Warranty Certificate (French)
  • tj-1008f - Garantie À Vie Limitée Trus Joist TimberStrand LSL

By using this website, you agree to our Privacy Policy. California residents: See our CCPA Privacy Notice for details on what personal information we collect and for what purposes.