---
kind: "section"
citation: "46 C.F.R. § 154.470"
title: "46"
number: "154.470"
heading: "General."
url: "https://uscodex.org/cfr/46/154.470"
---

# §154.470. General.

- (a) A cargo tank must have a support system that:
  - (1) prevents movement of the cargo tank under the static and dynamic loads in [§ 154.406](/cfr/46/154.406.md); and
  - (2) allows the cargo tank to contract and expand from temperature variation and hull deflection without exceeding the design stress of the cargo tank and the hull.
- (b) The cargo tank support system must have a key that prevents rotation of the cargo tank.
- (c) An independent tank must have supports with an antifloatation system that withstands the upward force of the tank without causing plastic deformation that endangers the hull structure when the tank is:
  - (1) Empty; and
  - (2) **In a hold space flooded to the summer load draft of the vessel.**

## Notes

### Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 FR 58285, Sept. 29, 2014]

### 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.

### Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 FR 58285, Sept. 29, 2014]