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If both the conditions (a) and (b) of Article 3.3.1.1 (a) and (b) of TBDY are fulfilled, a rigid basement is accepted and the building height H N is defined from the floor floor level at the top level of the basement walls. In this case, Rigid-X and Rigid-Y sections “Rigid” should be checked from the Floor General Settings Stories window.
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If any of the conditions 3.3.1.1 (a) and (b) are not met, the rigid basement acceptance shall not apply. In this case, basements and buildings without basement buildings ' upper elevations of the building will be defined on the basis base. In this case, the building height H N is the height from the foundation top level to the building top level. If any of these two conditions are not met, the Rigid -X and Rigid-Y section column marks should be removed from the Floor General Settings Stories window and the analysis should be repeated.
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While determining the building height H N according to Article 3.3.1.3 of TBDY , extensions with small masses such as elevators stairs and engine machine rooms above the roof slab may not be taken into account. When the elevator stair/ engine machine room option is selected from the Floor General Settings Stories window, this floor is not taken into account in the building height H N.
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