Abstract: Apparatus for holding a plurality of three panels in a window construction is provided and comprises a horizontally disposed rail having a substantially U-shaped channel for receiving a lower end portion of a first panel therewithin with the U-shaped channel being defined by a horizontal bight and a pair of vertically disposed legs including an inner leg and an outer leg extending from opposite ends of the bight and an extension extending horizontally from the central part of the inner leg with the horizontal extension cooperating with a portion of the inner leg thereabove to define a first L-shaped channel for receiving a second of the three panels therewithin with the rail also having a second L-shaped channel disposed beneath the first L-shaped channel which is adapted to receive a third panel therewithin and the holding means also includes at least one F-shaped clip adapted to engage and hold upper portions of the first and second panels in position.