30 000 30 000 30 000 30 000 30 000 30 000 30 000volume cm 780 kg cm 38 462 38 462 38 462 38 462 38 462 38 462 38 462 38 462dia 67 50 64 20 60 70 58 00 55 50 50 10 46 00 42 60wall ht 6 00 7 40 9 00 10 50 12 00 16 00 20 00 24 00ratio wall ht dia 09 12 15 18 22 32 43 56area 3578 48 3237 14 2893 80 2642 09 2419 23 1971 36 1661 91 1425 31eff ht 10 78 11 94 13 29 14 60 15 93 19 54 23 25 27 01actual volume these dims 38 560 38 658 38 472 38 584 38 530 38 529 38 647 38 503floor beam width 1 10 1 10 1 20 1 40 1 50 1 60 1 70 1 80floor beam depth 33 33 34 40 42 44 45 47floor beam vol conc 76 98 73 21 77 80 102 04 109 85 110 81 110 55 113 22floor dia i s beam 66 40 63 10 59 50 56 60 54 00 48 50 44 30 40 80floor slab vol conc 432 85 390 89 347 56 314 51 286 28 230 93 192 67 163 43floor vol of conc cu m 509 83 464 11 425 37 416 55 396 12 341 74 303 22 276 65floor reinforcement slab 19 39 17 51 15 57 14 09 12 82 10 34 8 63 7 32floor reinforcement beam 4 74 4 51 4 79 6 28 6 76 6 82 6 80 6 97floor reinft total tonnes 24 13 22 01 20.