Dear all,
1)Be careful the BM1a don’t have the same position on section A-A and F-F. Indeed on section A-A BM1a are the exterior layer and BM1b are the interior layer and on section F-F it is the contrary. (it is also the same principle for the BM2a) therefore the BM1a are present only on section A-A and F-F. The rebars represented on the other section are BM1b at position n°2.
I attached a little sketch.
2) Yes BM1b and 1d are the same. It is a mistake.
regards