The Thermacore® Sectional Door Model 596 is ideal for extra heavy-duty applications where both thermal efficiency and sound suppression are desirable. The 596 is constructed of 20-gauge galvanized steel with a flush, textured finish. The sectional steel door model 596 incorporates the Thermacore® steel-polyurethane-steel panel construction, which provides a thermal barrier to withstand harsh climates and demanding environmental requirements.