
If the TS 500 11.4.2 equation 11.1 is not met, this message is given for flooring.
Solution :
Choose the flooring or tiles.
Click on properties.
In the General Settings tab, give enough thickness value to the Thickness line.

Icons:
h = slab thickness
lsn = Short side trim clear opening
α s = The ratio of the sum of slab continuous edge lengths to the sum of the side lengths.
m = ratio of slab long side to short edge