Building Plan & Elevation Detail, concrete blocks 6 "x 8" x16 "reinforced with rod # 3 to each 0.30m in vertical and # 3 to every 3 courses in horizontal. concrete blocks 4" x 8 "x 12" reinforced with rods # 3 every 0.30 m in vertical and # 3 to every 3 courses in horizontal. Columns of reinforced concrete of 3,000 psi, 0.40mx 0.40m with reinforcement of 8 rods # 6 and rings # 3 to each 0.20m and 0.10m in both directions.