Mich. Admin. Code R. 408.30522

Current through Vol. 24-19, November 1, 2024

Section R. 408.30522 - Minimum depth

Rule 522.

Section R403.1.4 of the code is amended to read as follows:

R403.1.4. Minimum depth. All exterior footings and foundation systems shall extend 42 inches below actual grade. Where applicable, the depth of the footings shall also conform to section R403.1.4.1 of the code.

Exception:

Upon evidence of the existence of any of the following conditions, the building official may modify the footing depth accordingly:

(a) Freezing temperatures (freezing degree days).

(b) Soil type.

(c) Ground water conditions.

(d) Snow depth experience.

(e) Exposure to the elements.

(f) Other specific conditions identified by the building official that may affect the foundation system.

Mich. Admin. Code R. 408.30522

MR 19, Eff. 2/6/2016