Use of UNT in Secondary beam design in Decking Floor

Hi, Im Al Amin,

I'm designing A mezzanine floor as decking floor slab. Normally for fixing Decking panel with Secondary beam and main beam we use self drilling screw. Secondary beam spacing is 1.2m. My question is can i use UNT  command in secondary beam for using screw connection with decking panel??

Secondly, If i can not use UNT command for screw connection then am i need to use shear stud for gaining effect of UNT command??

UNT value 1 or .... depends on what??

Above question is for when I Use UNT, say UNT-1  in secondary beam design, it shown pass. but when i remove UNT command then secondary beams fails. So i need to clear about UNT command gaining procedure. Is it screw ok or need to use shear stud??

Thanks & regards

Al Amin

Bangladesh