---
kind: "section"
citation: "46 C.F.R. § 171.073"
title: "46"
number: "171.073"
heading: "Treatment of stepped and recessed bulkheads in Type II subdivision."
url: "https://uscodex.org/cfr/46/171.073"
---

# §171.073. Treatment of stepped and recessed bulkheads in Type II subdivision.

- (a) A main transverse watertight bulkhead may not be stepped unless additional watertight bulkheads are located as shown in Figure 171.067(a) so that the distances A, B, C, and D illustrated in Figure 171.067(a) comply with the following:
  - (1) A and B must not exceed the maximum bulkhead spacing that permits compliance with [§ 171.070](/cfr/46/171.070.md); and
  - (2) C and D must not be less than the minimum spacing specified in [§ 171.070(e)](/cfr/46/171.070.md?p=e).
- (b) A main transverse watertight bulkhead may not be recessed unless all parts of the recess are inboard from the shell of the vessel as illustrated in Figure 171.067(c).
- (c) If a main transverse watertight bulkhead is recessed or stepped, an equivalent plane bulkhead must be used in the calculations required by [§ 171.070](/cfr/46/171.070.md).

## Notes

### Authority

Authority: 46 U.S.C. 2103, 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 79-023, 48 FR 51017, Nov. 4, 1983, unless otherwise noted.