The Complete Message:
The curtain thickness cannot be less than 250 mm. (TBDY 2018 7.6.1.2)
TBDY 2018 7.6.1.1 (a) in Item 7.6.1.3 't Except as exceptions, rectangular and U, L and T as the shearwalls of the body of the wall thickness times the height of 1/16 from and will be less than 250 mm, a condition .
You receive this warning because the shearwall thickness is less than 250 mm and the special condition given in 7.6.1.3 is not met. If 7.6.1.3 is provided, the wall thickness can be 200 mm.
7.6.1.3 - In buildings whose structural system consists of walls, if both conditions given in Equation (7.14) are met, the wall thickness shall not be less than 1/20 and 200 mm of the height of the highest story in the building.
Σ A g / Σ A p ≥ 0.002 and V t / Σ A g ≤ 0.5 f ctd (7.14)
Solution:
Give the size of the shearwall with the name and fold as at least 250 mm.
Choose shearwall, shearwalls.
Enter the properties.
In the general settings tab, increase the shearwall width and click the OK button.
Alternatively, the conditions given in 7.6.1.3 can be met. Your Ag can be enlarged.
Icons
ΣAg = The sum of the cross-sectional areas of the structural system elements working as a shearwall parallel to the earthquake direction considered at any floor.
ΣAp = Sum of plan areas of all stories of the building
Vt = Total earthquake load (base shear force) acting on the building according to TBDY 2018 Section 4
fctd = Design tensile strength of concrete