Section SPS 321.16 - Frost protection(1) GENERAL. (a) Footings and foundations, including those for landings and stoops, shall be placed below the frost penetration level or at least 48 inches below adjacent grade, whichever is deeper, except as allowed under sub. (2).(b) Footings may not be placed on frozen material.(2) EXCEPTIONS. (a) Frost protected shallow foundations shall be designed in accordance with ASCE-32 as adopted in Table 320.24-5.(b) Portions of footings or foundations located directly under window areaways do not require frost protection provided the rest of the foundation is protected in accordance with this section.(c) Footings and foundations may bear directly on bedrock less than 48 inches below adjacent grade provided all of the following conditions are met. 1. The rock shall be cleaned of all earth prior to placement.2. All clay in crevices of the rock shall be removed to the level of frost penetration or to 1.5 times the width of the rock crevice, whichever is less.3. Provisions shall be taken to prevent water from collecting anywhere along the foundation.(d) Subsection (1) (a) does not apply to the footing for a ramp and its handrail posts unless the ramp abuts a frost-protected stoop or landing, in which case only the footing for that abutting end of the ramp is required to have the frost protection under sub. (1)(a), such as by bearing onto the stoop or landing, so that a tripping hazard is not created. Wis. Admin. Code Department of Safety and Professional Services § SPS 321.16
Cr. Register, November, 1979, No. 287, eff. 6-1-80; am. (intro.), Register, February, 1985, No. 350, eff. 3-1-85; renum. (intro.) and (1) to be (1) and (2) and am. (2) (d), cr. (2) (e), Register, January, 1989, No. 397, eff. 2-1-89; am. (1), Register, November, 1995, No. 479, eff. 12-1-95; correction in (2) (e) made under s. 13.93(2m) (b) 7, Stats., Register, March, 2001, No. 543; CR 08-043: r. and recr. Register March 2009 No. 639, eff. 4-1-09; correction in (2) (a) made under s. 13.92(4) (b) 7, Stats., Register December 2011 No. 672.Amended by, CR 15-041: am. (1) (a), cr. (2) (d) Register December 2015 No. 720, eff.1/1/2016See ch. SPS 325 Appendix A for further information.