I have a project with 2 blocks- the admin block (66,000SF) and housing block (68,000SF). They are separated by a 4” expansion joint and have a CMU wall on each side of it. The only way to access one block from the other is through a single corridor. For the purpose of modeling, since they have their own external wall, and different major occupancy type, I’ve treated them as 2 separate buildings. Now the wall adjacent to the expansion joint- does this wall require insulation like a normal exterior wall to comply with ASHRAE code? Or do I treat this as an interior wall? Any clue?
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