---
kind: "section"
citation: "46 C.F.R. § 154.460"
title: "46"
number: "154.460"
heading: "Design criteria."
url: "https://uscodex.org/cfr/46/154.460"
---

# §154.460. Design criteria.


At static angles of heel up through 30°, a secondary barrier must

- (a) If a complete secondary barrier is required in [§ 154.459](/cfr/46/154.459.md), hold all of the liquid cargo in the cargo tank for at least 15 days under the dynamic loads in [§ 154.409(e)](/cfr/46/154.409.md?p=e);
- (b) If a partial secondary barrier is permitted in [§ 154.459](/cfr/46/154.459.md), hold any leakage of liquid cargo corresponding to the extent of failure under [§ 154.448(a)](/cfr/46/154.448.md?p=a) after initial detection or primary barrier leak for at least 15 days under the dynamic loads in [§ 154.409(e)](/cfr/46/154.409.md?p=e);
- (c) If the primary barrier fails, prevent the temperature of the vessel's structure from falling below the minimum allowable service temperature of the steel; and
- (d) **Be designed so that a cargo tank failure does not cause a failure in the secondary barrier.**

## Notes

### Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.