Aluminum bars in varying thicknesses and profiles sealed between insulating glass panels to simulate muntin bars. The main horizontal member forming the top of the window or door frame. A flat board, cut to fit the contour of a Bow or Bay window, for installing between the head jambs and the flat wall surface to finish off the area which would normally be ceiling. A horizontal framing member placed over the rough opening of a window to prevent the weight of wall or roof from resting on the window frame. A beam across the top of the rough opening for a window or door.
Headers rest on jack studs and support the weight of the wall above the window unit.
They are often constructed out of doubled 2x6's, 2x10's or 2x12's. The unit is then completely sealed, creating a moisture free air space. A window unit in which the top of the sash swings inward. Also referred to as thermopanes or sealed units. Heat transmission through this type of glass may be as low as half that without such an air space.