I noted that Sap is not taken the effect of slender section in design , i did experimental trial by increasing the width of flange and reducing the thickness the local buckling became non-compact then i did it same more time but still the section is non-compact and not jumping to slender ,however as per ASIC if b/2tf is more than (E/fy)^0.5 the section should be slender in local buckling.
Please if anyone faced this issue before advice me otherwise i have to design each section manually
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