See this chapter of the IRC except as provided below. Section R403 Footings. See this section of the IRC except as provided below.
- A. Section R403.1.3.2 Masonry stem walls with concrete footings. See this section of the IRC and add the following sentence to the end of the section. Where the slabs-on-ground are cast monolithically and rigid insulation is used as a forming material, a minimum of one and one-half inch rigid insulation shall be used. Where sandy, silty sand or sandy gravel soils are present, rigid insulation shall not be used as a forming material. Forms must be constructed to prevent the possibility of failure or collapse. Forms shall be constructed and maintained so that the finished concrete complies with Section R401.2.
- B. Section R403.1.4 Minimum depth. Delete the text of this section and substitute with the following: All exterior footings shall be placed at least 12 inches (305 mm) below grade. Where applicable, the depth of footings shall also conform to Sections R403.1.4.1 and R403.1.4.2.
[14.7.3.12 NMAC - Rp, 14.7.3.12 NMAC, 7/14/2023]