3 1/4" Quick Set for 3/16", 1/4" or 5/16" glazing

System 903 (NT) System 903 Quick Set offers an economical solution to ribbon glazing applications. This system is provided in stock lengths for fabrication in the field. Mullions are captured in head and sill can receptors without need for mechanical fasteners. Intermediate horizontals join mullions utilizing shear block construction. This system is available in butt-glazed or captured mullion versions and accommodates 3/16", 1/4" and 5/16" glazing.