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Does 510.2 horizontal separation mean that building above is only one story above grade plane?

Yikes

SAWHORSE
Joined
Nov 2, 2009
Messages
4,105
Location
Southern California
IBC table 506.2 lists allowable area for buildings that are "one story above grade plane", aka "S1".
Example: A-3 occupancy on a one story building is 36,000. If multistory, it's only 28,000.

Let's take that and place it on top of a one story concrete podium (on-grade parking underneath the podium), and the podium provides an IBC 510.2 "horizontal building separation allowance", and the A-3 building is allowed to be considered as separate and distinct for the purposes of calculating area limitations, limitations of number of stories, etc.)

Does that mean I get to treat the upper A-3 level as if it was NOT more than one story above grade plane?
 
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