The beam sizes for cantileve should be at least 500 "E" depth instead of "C" and can be taper section to suit with parameter beams "C". The 800 mm depth beams at third floor can't change to 650mm depth as well. So I will update the section which based on calculation and issue for construction. Can you please let MCS know for about that section changes.
Best Regards,
Zaw Zaw Aung
Director- Structural Engineer