[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: 46CFR172.110]

[Page 151]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 172--SPECIAL RULES PERTAINING TO BULK CARGOES--Table of Contents
 
Subpart E--Special Rules Pertaining to a Barge That Carries a Hazardous 
           Liquid Regulated Under Subchapter O of This Chapter
 
Sec. 172.110  Survival conditions.

    (a) Paragraphs (c) and (d) of this section apply to a hopper barge 
and paragraphs (e) through (i) apply to all other tank barges.
    (b) A barge is presumed to survive assumed damage if it meets the 
following conditions in the final stage of flooding:
    (c) A hopper barge must not heel or trim beyond the angle at which--
    (1) The deck edge is first submerged; or
    (2) If the barge has a coaming that is at least 36 inches (91.5 
centimeters) in height, the intersection of the deck and the coaming is 
first submerged, except as provided in paragraph (d) of this section.
    (d) A hopper barge must not heel beyond the angle at which the deck 
edge is first submerged by more than ``fa'' as defined in 
Sec. 172.090(c).
    (e) Except as provided in paragraphs (h) and (i) of this section, 
each tank barge must not heel beyond the angle at which--
    (1) The deck edge is first submerged; or
    (2) If the barge has one or more watertight trunks, the deck edge is 
first submerged by more than ``fa'' as defined in Sec. 172.090(c).
    (f) Except as provided in paragraphs (h) and (i) of this section, a 
tank barge must not trim beyond the angle at which--
    (1) The deck edge is first submerged; or
    (2) If the barge has one or more watertight trunks, the intersection 
of the deck and the trunk is first submerged.
    (g) If a tank barge experiences simultaneous heel and trim, the trim 
requirements in paragraph (f) of this section apply only at the 
centerline.
    (h) Except as provided in paragraph (i) of this section, in no case 
may any part of the actual cargo tank top be underwater in the final 
condition of equilibrium.
    (i) If a barge has a ``step-down'' in hull depth on either or both 
ends and all cargo tank openings are located on the higher deck level, 
the deck edge and tank top in the stepped-down area may be submerged.