[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR172.180]

[Page 154]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 172--SPECIAL RULES PERTAINING TO BULK CARGOES--Table of Contents
 
   Subpart G--Special Rules Pertaining to a Ship That Carries a Bulk 
       Liquefied Gas Regulated Under Subchapter O of This Chapter
 
Sec. 172.180  Extent of damage.

    For the purpose of Sec. 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.

                     Table 172.180--Extent of Damage
                          Collision Penetration

Longitudinal extent....................  0.495L\2/3\ 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 Perpendicular

Longitudinal 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 Position

Longitudinal 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.