StacksVerified U.S. regulatory reference

46 CFR §174.090

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When doing the calculations required in § 174.065—
  1. (a)The permeability of a floodable space, other than a machinery space, must be as listed in Table 174.090; and
  2. (b)Calculations in which a machinery space is treated as a floodable space must be based on an assumed machinery space permeability of 85%, unless the use of an assumed permeability of less than 85% is justified in detail.