46 CFR § 174.090
Permeability of spaces
April 15, 2021
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
Open Table
| 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 |
1Whichever results in the more disabling condition.
2If tanks are partially filled, the permeability must be determined from the actual density and amount of liquid carried.
Tried the LawStack mobile app?
Join thousands and try LawStack mobile for FREE today.
- Carry the law offline, wherever you go.
- Download CFR, USC, rules, and state law to your mobile device.
