WN-Series^® Wood-Nailer Joists

Glued finger-joint splices for superior hybrid wood-on-steel roof systems

Stiffer wood-nailer joists are safer to handle on the job site

WN-Series® Joists are finger-jointed providing a continuous force path along the entire length of the joist. Watch as engineers and erectors describe the benefits of this better-performing wood-nailer joist.

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Glued finger-joint splices make WN-Series® Joists stronger, stiffer, and more efficient

WN-Series® Joists revolutionize the wood-nailer joist market prevalent in the Western states of California, Idaho, Nevada, Oregon and Washington. Unique in their design, WN-Series® Joists are open-web steel joists with continuous 2- or 2½-inch-thick wood-nailers. Glued finger-joint splices maintain structural continuity in the full length of the joist. This innovative design produces a stronger, more efficient, and better-performing wood-nailer joist.

A steel and wood hybrid product, WN-Series® Joists facilitate the installation of wood decking over steel joists in the field. These joists are available in two profiles: parallel chord joists and single-pitched top chord joists. Both profiles are available with underslung or square ends with pitches up to 2 inches per foot. Overall depths range from 26.5 to 50.5 inches and spans from 24 to 70 feet.

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WN-Series® Joists feature a tension-controlled design

Superior to standard wood-nailer joists, WN-Series® Joists feature a tension-controlled design for increased load sharing under extreme gravity overload conditions. Tension-controlled design allows each joist to flex in the event of an overload to establish a time delay before the collapse of a roof or floor structure.

WN-Series® Joists are built in accordance with Steel Joist Institute specifications. In addition to ESR-3376, WN-Series® Joists are recognized by ICC report for ICC AC-449, the acceptance criteria for tension-controlled open-web steel joists.

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Benefits of WN-Series® Wood-Nailer Joists

Enhanced top chord lateral stiffness for safer handling, assembly, and erection
Minimized nailer widths for more consistent sub-purlin cut lengths
Reduced joist marks due to increased concentrated load flexibility
ICC-approved under ICC AC-449 acceptance criteria for tension-controlled open-web steel joists