Chelsea Building Products introduces the 9600 Series Single Hung designed for new construction featuring the side load bottom sash. The Side Load Single Hung series includes coordinating Picture Window, XO Horizontal Slider and XOX Horizontal Slider windows. The 9600 utilizes a universal frame system for the Single Hung and Horizontal Slider for ease of manufacturing. A welded frame and sash enhance structural integrity and increase weatherability, say officials. The 3-inch frame has a streamlined, clean exterior which offers an aesthetic design that is easy to manufacture. This model accepts 3/4-inch insulating glass.