Since Seattle weather is notoriously overcast for much of the year, many building owners and architects want to install structures to provide weather protection on roof decks. Although they may be outside of the building envelope, these structures are considered a part of the building area and need to comply with the fire-resistance and separation requirements in the Seattle Building Code .

Over the years, we have granted Code Modification Requests for relief from strict compliance to these code requirements on a case-by-case basis. To provide consistency and predictability for designers, we have recently published a new Construction Code Interpretation for Occupied Rooftop Structures .

This Code Interpretation provides two paths for compliance, waiving fire-resistance ratings for sm

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