46 CFR § 172.135 - Extent of damage.

---
identifier: "/us/cfr/t46/s172.135"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 172.135 - Extent of damage."
title_number: 46
title_name: "Shipping"
section_number: "172.135"
section_name: "Extent of damage."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "S"
subchapter_name: "SUBDIVISION AND STABILITY"
part_number: "172"
part_name: "SPECIAL RULES PERTAINING TO BULK CARGOES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3306, 3703, 5115; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation 00170.1, Revision No. 01.2."
regulatory_source: "CGD 79-023, 48 FR 51040, Nov. 4, 1983, unless otherwise noted."
cfr_part: "172"
---


# 172.135 Extent of damage.

For the purpose of § 172.133—

(a) Design calculations must include both side and bottom damage, applied separately; and

(b) Damage must consist of the penetrations having the dimensions given in Table 172.135 except that, if the most disabling penetrations would be less than the penetrations given in Table 172.135, the smaller penetration must be assumed.

Table 172.135—Extent of Damage

|  |  |
| --- | --- |
|  |  |
| Longitudinal extent | 0.495L ⁄ or 47.6 feet ((⁄)L ⁄ or 14.5m) whichever is shorter. |
| Transverse extent | B/5 or 37.74 feet (11.5m)  whichever is shorter. |
| Vertical extent | From the baseline upward without limit. |
|  |  |
| Longitudinal extent | L/10. |
| Transverse extent | B/6 or 32.81 feet (10m) whichever is shorter. |
| Vertical extent from the baseline upward | B/15 or 19.7 feet (6m) whichever is shorter. |
|  |  |
| Longitudinal extent | L/10 or 16.41 feet (5m) whichever is shorter. |
| Transverse extent | 16.41 feet (5m). |
| Vertical extent from the baseline upward | B/15 or 19.7 feet (6m) whichever is shorter. |
| Damage applied inboard from the vessel's side at right angles to the centerline at the level of the summer load line assigned under Subchapter E of this chapter. |  |
| B is measured amidships. |  |