This architectural drawing is the 2D design of the Stairs rise and trade inner reinforcement bar layout plan in AutoCAD drawing, CAD file, and dwg file. Stairs have many components like rise, trade, nosing, newel, etc... Here mention no.8 e=20 and no.10 1T8 is about the inner portion of stairs. For more details information check the pages of cadbull.com & Download the 2DAutocad DWG file.