Residential · IRC 2021 §R403.3 / Table R403.3(1)
Frost-Protected Shallow Foundation
Insulated shallow footing with depth D to scale for one Table R403.3(1) row, the full table by air-freezing index, the 64°F heated-building condition and unheated-space limits. Placement and A, B, C per Figure R403.3(1).. Referenced to IRC 2021 §R403.3 / Table R403.3(1).
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