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@umar I don't think so that checker will ask him to ascertain the effect of story drift on nonstructural member. If his structural system, which, I think, is comprised of RCC frame, satisfy the the drift limits that will limit, or avoid, the damage to cladding/non-structural-members, he does need to do anything else on these non-structural members. Yasir could inquire from him about that aspect, to know if he is worried about the damage to these vertical posts, and attached louvers, due to the drift experienced by RCC frame. In any case you can check the strength of these post against the moment and shear that will result from drift. I think that strength and serviceability limits should be satisfied for these non-structural members, independently of main structural system. It is the mid span deflection due to wind load that also needs attention. The thing you have mentioned refers to the members which are part of a system resisting gravity loads. Code requires us to design these members, meant to resist only gravity loads, for drift inflicted by the members, part of Lateral load resisting systems, on to them . The box-shaped posts, used in current discussion, only supports louvers.

Yeah thats a good observation. But Asad wants to model as-is. If he moves the column he can lose his accuracy on other things. Nothing is wrong, structural engineering is like that. "Structural engineering is the art of molding materials we don't wholly understand, into shapes we can't fully analyze, so as to withstand forces we can't really assess, in such a way that the community at large has no reason to suspect the extent of our ignorance." ...James E. Amrhein - Masonry Institute of America (Retired) LQEngineer (talk) 03:58, 1 September 2009 (UTC)

Yasir, see the attached file. Make sure, your wind & settlement are in one direction. In the attached sketch, I didn't have enough space to draw everything systematically, so I just randomly drew stuff. Your settlement at C should be Delta 1 + Delta 2 Make sure you run all your combos for wind @Sir Zeeshan, I think his checker wants him to calculate the effect of story drifts on the member itself. Same as we used to talk about designing members that not part of lateral force resisting system but are attached to lateral force resisting system, and will undergo a delta equal to story drift that will induce moment & shear in them. SEFP yasir.pdf