A typical stair stringer frames into hollow structural section columns sized four inches by four inches by one-quarter inch thick, unless noted otherwise. A one-quarter-inch-thick bearing plate sits between the stringer and columns, secured with two three-quarter-inch-diameter machine bolts. Three-eighths-inch-thick stiffener plates are welded inside the stringer assembly with three-sixteenths-inch fillet welds. Bolt spacing is dimensioned at two inches, four inches, three inches, and six inches depending on the specific column grid location.
Members view this detail in full resolution, download the CAD files (SVG, PDF), and can adapt it in the built-in CAD editor — export DXF, DWG, or PDF.
Start membership