Graham’s new GT6 window system is a family of casement, projected and fixed windows with various frame depths. By utilizing common frame parts, the GT6 system allows numerous configuration variations and glazing styles. Each frame depth offers four glazing profile options: beveled, concave, flat, and flat with flush face. Offering multiple frame depths allows a wide range of thermal performance for exacting specifications. This flexibility allows the GT6 to meet a wide range of budgets too. The windows are designed with special Euro-grooves to accommodate multiple hardware options. The GT6 product line achieves AAMA architectural (AW) ratings with minimum air infiltration, high water resistance and impressive design pressures.