2D design of spiral stair in AutoCAD drawing, CAD file, dwg file
<p>2D design of spiral stair in AutoCAD drawing. A spiral staircase is a construction with stairs that are oriented around a central post. This kind of stairway has its roots in the Middle Ages. Both defense and aesthetic reasons were served by them. <span lang="EN-US" style="mso-ansi-language: EN-US;">For more details and different CAD blocks download the AutoCAD dwg file.</span></p>