1) There is an error (ab) in the column and beam, but it reports and no error appears when I examine the report? 2) In the beam reinforcement area, the required 0 excess 4.52 cm2 is said in some beams on the left and in the span, is too much reinforcement used? 3) The program usually chooses 18 and 35 slab main and additional reinforcement intervals, but when we make them 20 and 40, the slabs usually do not give an error. How do we get it to choose this way? 4) When the additional reinforcement diameter fi8 is selected on the raft, it provides a little reinforcement economy, but it will be crowded and the price of fi8 kilos is slightly higher. From this point of view, how correct is it to use fi8 in addition to the raft?