<p>This Architectural Drawing is AutoCAD 2d drawing of metal structural frame. The <a class="mw-redirect" title="Rolling mill" href="https://en.wikipedia.org/wiki/Rolling_mill">rolled steel</a> "profile" or <a title="Cross section (geometry)" href="https://en.wikipedia.org/wiki/Cross_section_(geometry)">cross section</a> of steel columns takes the shape of the letter "I". The two wide <a title="Flange" href="https://en.wikipedia.org/wiki/Flange">flanges</a> of a column are thicker and wider than the flanges on a <a title="Beam (structure)" href="https://en.wikipedia.org/wiki/Beam_(structure)">beam</a>, to better withstand <a title="Compressive stress" href="https://en.wikipedia.org/wiki/Compressive_stress">compressive stress</a> in the structure. Square and round tubular sections of steel can also be used, often filled with concrete. Steel beams are connected to the columns with bolts and threaded fasteners, and historically connected by <a class="mw-redirect" title="Rivets" href="https://en.wikipedia.org/wiki/Rivets">rivets</a>. The central "web" of the steel <a title="I-beam" href="https://en.wikipedia.org/wiki/I-beam">I-beam</a> is often wider than a column web to resist the higher bending moments that occur in beams. For more detailos and information download the drawing file.</p>