46 C.F.R. § 172.180 Extent of damage.
Title 46 - Shipping
For the purpose of §172.170— (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 172.180 except that, if the most disabling penetrations would be less than the penetrations given in Table 172.180, the smaller penetration must be assumed.
Title 46: Shipping
PART 172—SPECIAL RULES PERTAINING TO BULK CARGOES
Subpart G—Special Rules Pertaining to a Ship That Carries a Bulk Liquefied Gas Regulated Under Subchapter O of This Chapter
§ 172.180 Extent of damage.
Table 172.180_Extent of Damage Collision PenetrationLongitudinal extent.................... 0.495L2/3 or 47.6 feet ((1/3)L2/ 3 or 14.5m) whichever is shorter.Transverse extent \1\.................. B/5 or 37.74 feet (11.5m) \2\ whichever is shorter.Vertical extent........................ From the baseline upward without limit.Grounding Penetration at the Forward End But Excluding Any Damage Aft of a Point 0.3L Aft of the Forward PerpendicularLongitudinal extent.................... 0.495L2/3 or 47.6 feet ((1/3)L2/ 3 or 14.5m) whichever is shorter.Transverse extent...................... B/6 or 32.81 feet (10m) whichever is shorter.Vertical extent from the molded line of B/15 or 6.6 feet (2m) whichever the shell at the centerline. is shorter. Grounding Penetration At Any Other Longitudinal PositionLongitudinal extent.................... L/10 or 16.41 feet (5m) whichever is shorter.Transverse extent...................... B/6 or 16.41 feet (5m) whichever is shorter.Vertical extent from the molded line of B/15 or 6.6 feet (2m) whichever the shell at the centerline. is shorter. \1\ 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.\2\ B is measured amidships.
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