Since its introduction last June, Kawneer’s Clearwall™ Curtain Wall has received a tremendous response from both the glazing and architectural communities. Now, to expand the product’s options for use on higher free span applications, we have introduced a Shear Block fabrication option (at far right). Paralleling the original Screw Spline option (at near right), the Shear Block version uses deep mullions and comes in the same three glazing methods that utilize the innovative toggle assembly as part of the glass retaining system.

Clearwall™ Curtain Wall with Shear Block Fabrication Toggle Glazing (TG) Options:

Clearwall™ SB (Shear Block) (top) glazing option uses the toggle system with a 1-1/8" insulating glass unit with a recessed spacer, supplied by Viracon. The toggle mechanically captures the inboard lites of adjacent glass units, and eliminates the need for structural silicone, saving costly application and cure times.

Clearwall™ SBI (Shear Block Interface) (bottom left) and SBIT (Shear Block Interface Tape) (bottom right) are two additional glazing options. Both options accommodate 1" insulating glass and use the same unique toggle system as the SB option. In both SBI and SBIT, the toggle captures a metal interface, which is shop-applied to the glass with structural silicone or 3M™ VHB™ structural glazing tape (3M and VHB are trademarks of 3M Company).

In addition, an all-glass 90 degree outside corner has been developed, which eliminates exterior metal sightlines at the corner. These major additions to the Clearwall™ Curtain Wall offering increase fabrication options while providing more aesthetic choices.

View the updated web page where you can also access additional product information including our flyer, architectural details and CAD and Spec downloads.

For full engineering, estimating and take-off support, as well as shop drawings contact your local customer service coordinator. Installation instructions can be accessed via the Resource Center on To discuss how this new product could be the right solution for your next project, contact your Kawneer sales representative.