Rigid reinforced concrete curtains used around the basement floors of buildings are not automatically considered as part of the curtain or curtain-frame systems listed in Table 4.1.
Rigid reinforced concrete walls defined around the basement floors of the buildings are not considered as part of the curtain or curtain-framed systems in Table 4.1 .
As shown in the picture below, in a building with 2 basement floors and 5 normal floors, no curtain is defined except for rigid basement walls. Rigid basement curtains are not taken into account when selecting the load-bearing system of such a building according to Table 4.1 . For this reason, the bearing system of the building shown below can be classified as buildings in which all earthquake effects are carried by reinforced concrete frames with high (or limited) ductility level .
