The reason for this is that the rebar is most likely a grid of 20cm squares placed along the walls of the room. If the ceiling is poured concrete. If, on the other hand, it is made from prefab elements, all rebar will probably run in one direction only.
Khalkeus_ t1_ix85wjm wrote
Reply to comment by stay_or_go_69 in drilling holes for anchors in concrete ceiling - how to find rebar by stay_or_go_69
The reason for this is that the rebar is most likely a grid of 20cm squares placed along the walls of the room. If the ceiling is poured concrete. If, on the other hand, it is made from prefab elements, all rebar will probably run in one direction only.