Calculating Floor Area Above/Below Grade

In tallyCAT, here's our approach to differentiating between 'above grade' and 'below grade' areas:

We set a threshold, for instance, -2 ft.

We then analyze all the elements within the Revit project that fall under the "Floors" category.

For each of these elements, we assess whether it has an assigned level and if the elevation of that level is above or below our established threshold.

• If the elevation is greater than the threshold, we include the area of that floor element in the total "above grade" floor area.

• Otherwise, we incorporate the area of that floor element into the total "below grade" floor area.