Engineered for consistent performance, Weyerhaeuser's TimberStrand® Laminated Strand Lumber (LSL) starts straight and stays straight. It’s an innovative and versatile building product for a diverse range of applications such as tall walls, beams, rim board, sill plates and more.

TimberStrand LSL studs and columns provide excellent value when used selectively in the framing zones of a house, where straight studs translate into flush walls. These zones include kitchen cabinet walls, tiled bath walls, tall walls, and other prominent areas, such as …

Parallam® PSL columns are strong and consistent. Our manufacturing process uses veneer strands, allowing a significant percentage of each log to become a high-grade structural member. Combine their great load capacity with the strength of …

Weyerhaeuser manufactures zinc borate treated TimberStrand® LSL sill plates, columns, and studs using our patented StrandGuard® TimberStrand® LSL process that provides protection against structural damage caused by wood-destroying insects and decay.

Laminated Strand Lumber (LSL) • One-piece members reduce labor time • Every piece is straight and strong • Unique properties allow you to drill larger holes through 1.55E TimberStrand® LSL. See Allowable Holes on page 26. Code Evaluations: See ICC-ES ESR-1387 TimberStrand® LSL Grade Verification

Trus Joist® TimberStrand® laminated strand lumber (LSL) and Parallam® parallel strand lumber (PSL) can help you meet the requirements of these challenging designs. Weyerhaeuser also offers product and design support that includes technical information, design software, and design advice from our team of skilled engineers and sales representatives.

Trus Joist®TimberStrand®LSL, Microllam®LVL, and Parallam®PSL are structural solutions you can count on—guaranteed. The products in this guide are readily available through our nationwide network of distributors and dealers. For more information on other applications or other Trus Joist®products, contact your Weyerhaeuser representative.

Trus Joist® TimberStrand® LSL columns are strong and consistent. Combine their great load capacity with the strength of TimberStrand® LSL beams, and longer spans and open floor plans are possible.

TimberStrand® LSL has a shear stress of 400 psi—up to 50% stronger than other common EWPs—making TimberStrand® LSL the right solution for the right job. Thanks to its dimensional stability and durability, it resists warping, twisting, cupping, or checking and stands up to the challenges of dry climates.

TimberStrand ® LSL (Laminated Strand Lumber) is one of the most innovative and versatile wood building products available. TimberStrand ® LSL is manufactured using small strands from fast-growing tree species such as aspen and yellow poplar. These strands are oriented and pressed together to make strong, structural material for use as beams ...