§ 13.08.189. Frost protection—Exception.

1.

Delete Exception 1 and replace with:

 The minimum depth of footings, foundations, walls, piers and other permanent supports of buildings or structures below the undisturbed ground surface shall be a minimum of 42 inches in depth.

2.

Delete Exception 2 and Exception 3 and replace with:

 Protection of free standing accessory structures with a floor area of 720 square feet or less, of light frame construction, and an eave height of ten (10) feet or less, may utilize a monolithic or "Floating Slab" foundation with a minimum of one (1) foot thickened edge perimeter footing with a minimum of a four (4) inch nominal slab. No additions shall be permitted to any structure utilizing a monolithic slab foundation without installing a foundation system in accordance with minimum depth requirements.

 Protection of free standing accessory structures with an area of 400 square feet or less, of other than light frame construction, principally masonry with an eave height of ten (10) feet or less, may utilize a monolithic slab foundation with a minimum eighteen (18) inches by eighteen (18) inches thickened edge perimeter footing with a four (4) inch nominal slab with a concrete mix design which will attain a 28 day compressive strength of 3500 psi for masonry walls not exceeding eight (8) feet in height and 4000 psi for masonry walls not exceeding ten (10) feet in height. No additions shall be permitted to any structure utilizing a monolithic slab foundation without installing a foundation system which complies with the frost depth provisions of this section.

(Ord. No. 6290, § 2, 4-24-2017).