In case of walls of thickness greater than 170 mm but less than or equal to 220 mm, and also for walls of thickness greater than 220 mm with more than nominal reinforcement, provide two layers of reinforcement in both vertical and horizontal directions, the former being placed on the inside of the latter. Clips should be provided to restrain the vertical bars against buckling, or displacement during concreting. In walls of thickness greater than 220 mm with nominal reinforcement, horizontal steel may be placed inside the vertical steel to reduce the possibility of the coarse aggregate being ‘hung-up’ on the horizontal bars
In concrete sections of thickness 225 mm or greater, two layers of reinforcement shall be placed one near each face of the section to make up the minimum reinforcement.