This architectural drawing is Staircase reinforcement details in AutoCAD 2D drawing, CAD file, and dwg file. The primary function of stairs is to provide a simple and easy way of moving between levels. Houses and shelters had only one story in ancient times, but it was discovered that the area above ground level could be used to increase the amount of space a structure could offer. For more details and information download the drawing file. Thank you for visiting our website cadbull.com.