Why do I get the warning “Contours Not Possible. Values are Identical” when I try to view the stiffness ratio (Ieff/Igross) in the View Results Screen?
If no cracking occurs in the slab, the displacement values for the cracked and uncracked conditions are equal, therefore the results cannot be displayed for cracking.
Why are my design sections shown Green and “OK” as design status for initial stress when the stress values exceed allowable values?
ACI 318 allows mild reinforcement to be added to slabs and beams to account the tensile force resulting from the overstress. Since the program adds this reinforcement, the design sections and status are shown as “OK.” The same is true for international codes where mild reinforcement is required where overstress occurs.