<p>This Architectural Drawing is AutoCAD 2d drawing of Cross section of Metallic Structure Frame. Steel frame is a building technique with a "skeleton frame" of vertical steel columns and horizontal I-beams, constructed in a rectangular grid to support the floors, roof and walls of a building which are all attached to the frame. The development of this technique made the construction of the skyscraper possible. For more details and information download the drawing file.</p>