This archiCross sections of different columns with reinforcement details in AutoCAD 2D drawing, CAD file, and dwg file. The maximum reinforcement in any structure shall not exceed 6% of the total concrete area. The minimum reinforcement in any structural part should not be less than 0.8% of the gross sectional area of concrete. A minimum of four bars should be used for a rectangular structure. For more details and information download the drawing file. Thank you for visiting our website cadbull.com.