24 CFR §3285.404
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
In frost-susceptible soil locations, ground anchor augers must be installed below the frost line, unless the foundation system is frost-protected to prevent the effects of frost heave, in accordance with acceptable engineering practice and § 3280.306 of this chapter and § 3285.312.