If I calculated for an example the total area of rebars in a beam and I got let's say 433 mm2 I can now choose let's say 4 - 12 diameter bars or 2 - 16 diameter bars in a 300 mm width beam
both will satisfy the minimum reinforcement and the maximum and minimum spacing due to ACI code. Does it matter if I chose any of them ? I know that the lesser the spacing between rebars the better to resist internal cracks in concrete.
What are your thoughts ?