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Allowable area increase: perimeter calc of donut-shape

Y

Yikes

SAWHORSE
Joined
Nov 2, 2009
Messages
4,104
Location
Southern California
I have a square-shaped "donut" building - - it has a big inner courtyard in the middle, completely surrounded by my building (except for a couple of exit passageway tunnels).
When doing the frontage calc per IBC 506.3, it says I need to input "P", the length of the perimeter of entire building.
Do I include:
(a) only the outer perimeter of the building, or
(b) the outer perimeter plus the inner courtyard perimeter?​
 
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