Glass is set to the front of the system to maximize thermal performance and may be glazed from either the interior of the building for labor savings or from the exterior at column line applications. YWW 45 FI may be installed with head and sill members running continuously or with the head and sill members cut in between the vertical members. Sill flashing is only required when the head and sill members are cut in between the verticals; in addition, sill members are anchored without penetrating the sill flashing.

Product Data


Expedited Shipping / Non Thermal


  • Perimeter Members: 2″ x 4-1/2″
  • Intermediate Members: 2-1/4″ x 4-1/2″
  • Screw Spline or Shear Block Construction
  • Optional Structural Silicone Glazed Intermediate Vertical
  • Optional Strap & Roll-Over Anchors Available for Precast Conditions.



Construction Use: New / Retrofit

Sightline: 2″, 2-1/4″

Mullion Depth: 4-1/2″

Framing Installation Method: Continuous Head and Sill / Vertical Through / Screw Spline

Glazing Installation: Outside / Inside

Glass Type: Insulating

Glass Configuration: Center