As the frames are never connected, I don't find it right to make cantilever beams from the column (or curtain). Although I do not recommend the hollow block system too much, I recommend you to make a hollow block system in such low-rise projects where the frames are difficult to complete (in terms of architecture). Frames are not complete on three fronts in your system. Adjust the support conditions of the ladder and solve with the system. Use the semi-rigid diaphragm option. Use the superstructure interactive solution option. I guess you didn't design wet volumes as low. Review the floor and wall loads on the attic. Good work.
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