When applying the 3000 sf design area required for unsprinklered combustible concealed spaces, can the area be smaller than 3000 sf based on the surrounding walls and ceiling assemblies all being one hour fire rated? In this situation I have rooms that are separated from the other areas that are only 1400 sf or so. The space above the ceiling is double wood construction with only a few inches separating joist. The areas are light hazard.
Thank you, Bob Knight, CET III 208-318-3057 FBK-LOGO-SMALL
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