two way slab opening in column strip. 3

[GBMRAO]

Hi Structural Engineers:
First of all thanks to all engineers who are helping hospitals/clinics/urgent care for analysis and upgrades to help covid patients accomodation.

I have a two-way flat slab supported by concrete columns and perimeter beams.
The contractor made openings in the column strip along the end bay. Initially, it was shown there by the MEP engineers but a later structural consultation revision was sent to make an opening at a different location in the middle of the slab. but accidentally they made an opening in the first location.

Does anyone know any way how to analyze and support and transfer the loads to the adjacent slab in case of opening in column strip? i could not find any documentation for openings in column strip and how to distribute in a manual calculation. see attached existing plan with opening.
My thought process is to model it in software, find moments around opening and provide respective steel below and extend to adjacent rebar based on their capacity. I may be wrong but need some expert suggestions.

ANy help is appreciated.

 

[HTURKAK]

..........The first sketch shows orthogonal bars being welded together, but that is something that would not be done in a normal installation. Normally, bars would be tied together with wire to keep them in place while pouring, so I am wondering if that type of weld is necessary....

True... although full penetration weld ( butt weld ) is also applicable, i prefer V-groove weld. The snap just to show groove weld and the use of two short bars at each side of the joint to avoid eccentricity will excellent...