In my two floor plan, distance between two pillars (pillar Size 9"x9") varies from 10' to 12'.
Whether position of pillars & Beams as shown in plan are correct. If not, please suggest?
The distance between the pillars also depends on your room designing, by looking at the drawing it seems to be ok.
Please ask your contractor to mention about the no.of rods in the mentioned pillars and thier gauge. This is very important