This is a 3D CAD detail of a window wall header system, showing the connection and profile layout at the top of a modular window wall unit. The design features aluminum extrusions with integrated glazing pockets, pressure plates, gaskets, and thermal barriers (highlighted in green) to enhance energy performance. The white elements represent stiffeners or anchors integrated for structural support. This header detail is key in supporting vertical loads and providing air- and water-tight connections to adjacent building elements.