Permeability of spaces.

When doing the calculations required in § 174.065— (a) The permeability of a floodable space, other than a machinery space, must be as listed in Table 174.090; and (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. Table 174.090—Permeability Spaces and tanks Permeability (percent) Storeroom spaces 60. Accommodation spaces 95. Voids 95. Consumable liquid tanks 95 or 0. 1 Other liquid tanks 95 or 0. 2 1 Whichever results in the more disabling condition. 2 If tanks are partially filled, the permeability must be determined from the actual density and amount of liquid carried.