How to Read Plinth Beam Drawing? Depth of Beam for 4 floors Building

[@aproverbaday4232]

Thanks my brother .i am from Ethiopia

[@feedmyego8874]

sir its mentioned T12@6" C/C in structurals, does this mean 12mm rods with 6 inch spacing? and is 12mm enough for G+2 house? some are saying you need to use 16mm but we got structurals done and it only says 12mm