---
kind: "section"
citation: "46 C.F.R. § 32.56-22"
title: "46"
number: "32.56-22"
heading: "Openings in and insulation of boundaries: Other spaces—T/ALL."
url: "https://uscodex.org/cfr/46/32.56-22"
---

# §32.56-22. Openings in and insulation of boundaries: Other spaces—T/ALL.


If openings are fitted into the following exterior boundaries of any space other than an accommodation, service, or control space, the interior of the space must be insulated to “A-60” Class and the space must not provide access to any accommodation, service, or control space:

- (a) **The exterior boundaries that face the cargo area.**
- (b) The portion of the exterior boundaries within 3 meters (10 feet) or the length of the vessel divided by 25, whichever is greater, except that the distance need not exceed 5 meters (16.4 feet), of these boundaries.

## Notes

### Source

Source: CGD 74-127, 41 FR 3844, Jan. 26, 1976, unless otherwise noted.

### Authority

Authority: 46 U.S.C. 2103, 3306, 3703, 3719; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4; Subpart 32.59 also issued under the authority of Sec. 4109, Pub. L. 101-380, 104 Stat. 515.

### Source

Source: CGFR 65-50, 30 FR 16671, Dec. 30, 1965, unless otherwise noted.