2017-12964: Interpretative Bulletin for Model Manufactured Home Installation Standards Foundation Requirements in Freezing Temperature Areas Under 24 CFR 3285.312(b)
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The purpose of this proposed Interpretative Bulletin (IB) is to provide guidance for designing and installing manufactured home foundations in areas subject to freezing temperatures with seasonal ground freezing, in accordance with the Model Manufactured Home Installation Standards, wherever soil conditions are susceptible to frost heave. Specifically, this guidance is being provided for designing and installing manufactured home foundation systems in areas where frost susceptible seasonally frozen ground conditions are encountered and when footings do not extend below the frost depth at the site. These types of foundation systems include monolithic slab systems, "frost-protected shallow foundations" (FPSF)--insulated foundations, and alternative foundation systems that include foundation variations termed by industry as frost free footing systems or frost free foundations (FFF). Guidance is also being provided in this interpretative bulletin for installing manufactured home foundations, when non-frost susceptible soil conditions are available at the site to protect foundations against the effects of frost heave.
The agency’s own summary, as published.
What this changes
Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.
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