CCLME.ORG - 46 CFR PART 72—CONSTRUCTION AND ARRANGEMENT

National
United States Regulations
46 CFR PART 72—CONSTRUCTION AND ARRANGEMENT

Title 46: Shipping

PART 72—CONSTRUCTION AND ARRANGEMENT

--------------------------------------------------------------------------------

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

Source: CGFR 65–50, 30 FR 16903, Dec. 30, 1965, unless otherwise noted.

Subpart 72.01—Hull Structure
top
§ 72.01-1 Application.
top
The provisions of this subpart, with the exception of §72.01–90, shall apply to all vessels contracted for on or after November 19, 1952. Vessels contracted for prior to November 19, 1952, shall meet the requirements of §72.01–90.

[CGD 95–028, 62 FR 51204, Sept. 30, 1997]

§ 72.01-5 Vessels subject to load line.
top
(a) For vessels assigned a load line, see subchapter E (Load Lines) of this chapter, for special requirements as to strength, closure of openings, etc.

(b) [Reserved]

§ 72.01-10 Vessels using fuel having a flashpoint of 110 degrees F. or lower.
top
(a) Where liquid fuel having a flashpoint of 110 degrees F. or lower is carried for main or auxiliary machinery or for starting purposes, such machinery and fuel tanks shall be in separate vapor tight compartments separating each from the other and from the remainder of the vessel.

(b) [Reserved]

§ 72.01-15 Structural standards.
top
(a) In general, compliance with the standards established by the American Bureau of Shipping, see subpart 70.35 of this subchapter, will be considered satisfactory evidence of the structural efficiency of the vessel. However, in special cases, a detailed analysis of the entire structure or some integral part may be made by the Coast Guard to determine the structural requirements.

(b) [Reserved]

§ 72.01-20 Special consideration.
top
(a) Special consideration will be given to the structural requirements for vessels, such as small vessels or vessels of unusual design not contemplated by the standards established by the American Bureau of Shipping, see subpart 70.35 of this subchapter.

(b) [Reserved]

§ 72.01-25 Additional structural requirements.
top
(a) Vessels required by part 171 of this chapter to have subdivision bulkheads, double bottoms, etc. must comply with the following structural requirements:

(1) Each watertight subdivision bulkhead, whether transverse or longitudinal, shall be constructed in such a manner that it shall be capable of supporting, with a proper margin of resistance, the pressure due to the maximum head of water which it might have to sustain in the event of damage to the vessel, but at least the pressure due to a head of water up to the margin line. The construction of the bulkheads shall be to the satisfaction of the Commandant.

(2) Steps and recesses in subdivision bulkheads shall be watertight and as strong as the bulkhead at the place where each occurs. Decks, trunks, tunnels, duct keels, ventilators, etc., that are made watertight to maintain the subdivision requirements for a vessel shall be of the same strength as the bulkhead at the corresponding levels. The means used for making them watertight and the arrangements adopted for closing openings in them shall be to the satisfaction of the Commandant. Watertight ventilators and trunks shall be carried at least up to the bulkhead deck.

(3) Where frames or beams pass through a watertight bulkhead or deck, such bulkhead or deck shall be made structurally watertight without the use of wood, cement, or similar materials.

(4) Subdivision bulkheads, including steps, recesses, trunks, tunnels, ventilators, etc., which might form part of such bulkheads, shall be thoroughly examined and hose tested upon completion of construction. The water pressure for such tests shall be at least 30 p.s.i. Testing of main compartments by filling them with water is not compulsory.

(5) The forepeak, double bottoms (including duct keels), and inner skins shall be tested with water to-a-head corresponding to the requirements of paragraph (a)(1) of this section upon completion of construction.

(6) The watertight space enclosing the stern tube shall be tested by filling with water to-a-head up to the deepest subdivision load line.

(7) Tanks which are intended to hold liquids, and which form part of the subdivision of the vessel, shall be tested for tightness upon completion of construction with water to-a-head up to the deepest subdivision load line or to-a-head corresponding to 2/3 of the depth from the top of the keel to the margin line in way of the tanks, whichever is greater; but in no case shall the test-head be less than 3 feet above the top of the tank.

(8) The tests referred to in the preceding paragraphs (a) (5), (6), and (7) of this section are for the purpose of insuring that the subdivision structural arrangements are watertight and are not regarded as a test of the fitness of any compartment for the storage of oil, fuel or for other specific purposes for which a test of a superior character may be required depending upon the height to which the liquid has access in the tank or its connections.

(b) [Reserved]

[CGFR 65–50, 30 FR 16903, Dec. 30, 1965, as amended by CGD 79–023, 48 FR 51007, Nov. 4, 1983]

§ 72.01-90 Vessels contracted for prior to November 19, 1952.
top
(a) Existing structure previously approved will be considered satisfactory so long as it is maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and alterations may be made to the same standard as the original construction.

(b) [Reserved]

[CGFR 65–50, 30 FR 16903, Dec. 30, 1965, as amended by CGFR 66–33, 31 FR 15281, Dec. 6, 1966]

Subpart 72.03—General Fire Protection
top
§ 72.03-1 Application.
top
(a) The provisions of this subpart shall apply to all vessels.

(b) [Reserved]

§ 72.03-5 Fire hazards to be minimized.
top
(a) The general construction of the vessel shall be such as to minimize fire hazards insofar as is reasonable and practicable.

(b) [Reserved]

§ 72.03-10 Woodwork insulated from heated surfaces.
top
(a) Internal combustion engine exhausts, boiler and galley uptakes and similar sources of ignition shall be kept clear of and suitably insulated from any woodwork or other combustible matter.

(b) [Reserved]

§ 72.03-15 Lamp room construction.
top
(a) Lamp, paint, and oil lockers and similar compartments shall be constructed of steel or shall be wholly lined with metal.

(b) [Reserved]

Subpart 72.04—Navigation Bridge Visibility
top
§ 72.04-1 Navigation bridge visibility.
top
Each passenger vessel which is 100 meters (328 feet) or more in length and contracted for on or after September 7, 1990, must meet the following requirements:

(a) The field of vision from the navigation bridge, whether the vessel is in a laden or unladen condition, must be such that:

(1) From the conning position, the view of the sea surface is not obscured forward of the bow by more than the lesser of two ship lengths or 500 meters (1640 feet) from dead ahead to 10 degrees on either side of the vessel. Within this arc of visibility any blind sector caused by cargo, cargo gear, or other permanent obstruction must not exceed 5 degrees.

(2) From the conning position, the horizontal field of vision extends over an arc from at least 22.5 degrees abaft the beam on one side of the vessel, through dead ahead, to at least 22.5 degrees abaft the beam on the other side of the vessel. Blind sectors forward of the beam caused by cargo, cargo gear, or other permanent obstruction must not exceed 10 degrees each, nor total more than 20 degrees, including any blind sector within the arc of visibility described in paragraph (a)(1) of this section.

(3) From each bridge wing, the field of vision extends over an arc from at least 45 degrees on the opposite bow, through dead ahead, to at least dead astern.

(4) From the main steering position, the field of vision extends over an arc from dead ahead to at least 60 degrees on either side of the vessel.

(5) From each bridge wing, the respective side of the vessel is visible forward and aft.

(b) Windows fitted on the navigation bridge must be arranged so that:

(1) Framing between windows is kept to a minimum and is not installed immediately in front of any work station.

(2) Front windows are inclined from the vertical plane, top out, at an angle of not less than 10 degrees and not more than 25 degrees.

(3) The height of the lower edge of the front windows is limited to prevent any obstruction of the forward view previously described in this section.

(4) The height of the upper edge of the front windows allows a forward view of the horizon at the conning position, for a person with a height of eye of 1.8 meters (71 inches), when the vessel is at a forward pitch angle of 20 degrees.

(c) Polarized or tinted windows must not be fitted.

[CGD 85–099, 55 FR 32247, Aug. 8, 1990]

Subpart 72.05—Structural Fire Protection
top
§ 72.05-1 Application.
top
(a) The provisions of this subpart shall apply to the following vessels:

(1) All vessels of 100 gross tons and over.

(2) All vessels which carry more than 150 passengers.

(3) All vessels on an international voyage.

(b) The provisions of this subpart, with the exception of §72.05–90, shall apply to all vessels noted in paragraph (a) of this section contracted for on or after May 26, 1965. Such vessels contracted for prior to May 26, 1965, shall meet the requirements of §72.05–90.

§ 72.05-5 Definitions.
top
Note: The parenthetical number after each space refers to the applicable column and row number in tables 72.05–10 (d) through (g).

(a) Safety areas will be considered as including the following spaces:

(1) Control stations, i.e., spaces containing the emergency source of power, and those spaces in which a continuous watch is maintained and in which navigating, radio, or fire-control equipment is located. (1)

(2) Passenger and crew stairway and elevator enclosures. (2)

(3) Passenger and crew communicating corridors. (3)

(4) Open decks and enclosed promenades in way of lifeboat embarkation or lowering positions. (4) (See also paragraph (l) of this section.)

(b) Accommodation spaces will be considered as including the following spaces:

(1) Public spaces, such as halls, dining rooms, messrooms, lounges, cafes, and other similar spaces normally accessible during the voyage. (5) through (7) (Depending upon size and furnishings.)

(2) Public sales rooms and similar spaces. (6) or (7) (Depending on size.)

(3) Staterooms, including passenger and crew rooms, barber shops, beauty parlors, offices, dispensaries, etc. (5) or (6) (Depending on furnishings.)

(4) Washrooms and toilet spaces, both public and private. (8)

(5) Isolated lockers and small storerooms in accommodation areas. (6)

(6) Isolated serving pantries, etc., in accommodation areas, with incombustible furnishings. (8)

(7) Operating rooms. (8)

(8) Small laundries containing only tubs and washing machines, with no facilities for drying other than small electric driers. (8)

(9) Small cleaning gear lockers containing only slop sinks, and having no room for stowing materials other than a broom, mop, cleaning powder, soap, etc. (8)

(10) Large cleaning gear lockers having considerable stowage space. (6) or (9)

(c) Service spaces will be considered as including the following spaces:

(1) Motion picture projection rooms and film stowage rooms. (6) or (9)

(2) Galleys, main pantries, and storerooms, including alleyways and stairs, part of and for the exclusive use of such spaces. (9)

(3) Diet kitchens. (6) or (9) (Depending on furnishing.)

(4) Work shops (not part of machinery spaces, galleys, etc.), large laundries, drying rooms, mail and baggage rooms, etc. (9)

(5) Garbage disposal and stowage rooms, and trash stowage rooms. (9)

(6) Paint and lamp rooms, and similar spaces containing highly combustible materials. (9)

(d) Machinery spaces—will be considered as including the following spaces:

(1) Main machinery spaces, including trunks and casings, alleyways, gratings, and stairways, part of and for the exclusive use of these spaces, auxiliary machinery spaces containing internal combustion machinery or other oil burning, heating, or pumping units, and fuel oil filling stations. (10)

(2) Auxiliary machinery spaces containing only pumps, tanks, electrical machinery, ventilation or air conditioning equipment, resistors, steering machinery, stabilizer machinery, etc. (12) (Where such spaces contain considerable stowage space for combustibles.) (10)

(e) Cargo spaces will be considered as including the following spaces:

(1) Cargo holds, lockers, and trunks, both accessible and inaccessible and including refrigerated cargo spaces and cargo oil tanks intended for the alternate carriage of dry cargo. (11)

(2) Cargo oil tanks if not intended for the alternate carriage of dry cargo. (12)

(f) Miscellaneous spaces will be considered as including the following spaces:

(1) Fuel and water tanks and voids. (12)

(2) Open decks and enclosed promenades except in way of lifeboat embarkation and lowering positions. (13) (See also paragraph (l) of this section.)

(3) Shaft alleys when separated from machinery spaces, and containing no space assigned for the stowage of combustibles. (12)

(g) A standard fire test is one which develops in the test furnace a series of time-temperature relationships as follows:

5 minutes...... 1,000 °F.
10 minutes..... 1,300 °F.
30 minutes..... 1,550 °F.
60 minutes 1,700 °F.

(h) Main vertical zones are those sections, the mean length of which does not, in general, exceed 131 feet on any one deck, into which the hull, superstructure, and deckhouses are required to be divided by fire-resisting bulkheads.

(i) Where the term steel or other equivalent metal is used in this part, it is intended to require a material which, by itself or due to insulation provided, has structural and integrity qualities equivalent to steel at the end of the applicable fire exposure.

(j) Working spaces will be considered as only those service and machinery spaces where personnel are normally employed as contrasted to those where personnel may occasionally visit or be employed for short periods of time.

(k) Passenger or crew corridors over 8 feet in width will be considered as public spaces for the purpose of this subpart.

(l) Spaces which might be considered as open decks due to the presence of permanent openings to the weather in one or more sides, or where any or all sides may be completely open to the weather, will be considered as interior or enclosed spaces for the purpose of this subpart if any spot on the overhead is more than 15 feet from the nearest opening to the weather. This requirement shall only apply to those portions of the space as are under a deck or canopy, but it shall not be considered as a restriction against permanent opening or a restriction against the materials used for a canopy. This paragraph shall not apply to open or enclosed promenades having a nominal width of 15 feet or less.

(m) Where balconies are installed opening into a space, the following general requirements shall be met:

(1) For the purpose of meeting main vertical zone bulkhead spacing, the length of the space to which the balcony is open will be considered as being increased by an amount equal to the gross area of the balcony divided by the average width of the space.

(2) Where balconies are formed by penetrating one or more decks, the bulkheads in the upper portion of the space are, in effect, part of a stepped or recessed deck and should be treated as such for fire control purposes. In this regard, particular attention should be given to the protection of openings with proper doors of the type indicated in §72.05–25(b)(9).

(3) Two means of escape shall be provided for each balcony, at least one of which shall be independent of the space to which the balcony is open.

§ 72.05-10 Type, location, and construction of fire control bulkheads and decks.
top
(a) The hull, structural bulkheads, decks, and deckhouses shall be constructed of steel or other equivalent metal construction of appropriate scantlings.

(b) The hull, superstructure, and deck houses shall be subdivided by suitable structural steel or other equivalent metal bulkheads into main vertical zones, the mean length of which shall not, in general, exceed 131 feet on any one deck. Where practicable, the main vertical zone bulkheads shall be kept in a single vertical plane. However, on vessels designed for special purposes, such as automobile or railroad car ferries, where the installation of such bulkheads would defeat the purpose for which the vessel is intended, equivalent means for controlling and limiting a fire may be substituted if specifically approved by the Commandant.

(c) All bulkheads and decks shall be classed as A–60, A–30, A–15, A–0, B–15, B–0, or C, depending upon the type of space on each side of the bulkhead or above and below the deck.

(1) Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel, such as shell, structural bulkheads, and decks. They shall be so constructed that, if subjected to the standard fire test, they would be capable of preventing the passage of smoke and flame for 1 hour. In addition, they shall be so insulated with approved structural insulation, bulkhead panels, or deck covering that the average temperatures on the unexposed side would not rise more than 250 °F. above the original temperature, nor would the temperature at any one point, including any joint, rise more than 325 °F. above the original temperature, within the time listed below:

Class A-60..... 60 minutes.
Class A-30..... 30 minutes.
Class A-15..... 15 minutes.
Class A-0 0 minutes (i.e., no insulation
requirements).

(2) Bulkheads of the “B” Class shall be constructed with approved incombustible materials and made intact from deck to deck (or to ceiling as provided in paragraph (h) of this section) and to shell or other boundaries. They shall be so constructed that, if subjected to the standard fire test, they would be capable of preventing the passage of flame for 1/2 hour. In addition, their insulation value shall be such that the average temperature of the unexposed side would not rise more than 250 °F. above the original temperature, nor would the temperature at any one point, including any joint, rise more than 405 °F. above the original temperature within the time listed below:

Class B-15..... 15 minutes.
Class B-0 0 minutes (i.e., no insulation
requirements).

(3) Class C bulkheads or decks shall be constructed of approved incombustible materials, but need meet no requirements relative to the passage of flame nor the limiting of temperature rise.

(d) The minimum requirements for the bulkheads between the various spaces, where such bulkheads form the boundaries of main vertical zones, shall be as noted in table 72.05–10(d).

(e) The minimum requirements for the bulkheads between the various spaces, where such bulkheads do not form the boundaries of main vertical zones, shall be as noted in table 72.05–10(e).

(f) The minimum requirements for the decks between the various spaces, where such decks form the boundaries of stepped main vertical zones, shall be as noted in table 72.05–10(f).

(g) The minimum requirements for the decks between the various spaces, where such decks do not form the boundaries of stepped main vertical zones, shall be as noted in table 72.05–10(g).

Table 72.05-10(d)_Bulkheads_Main Vertical Zone
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Staterooms
Staterooms and public
and all spaces of Washrooms Open decks
public spaces 500 square Public toilet Galley, Fuel and
ADJACENT TO Stairway Life boat with feet or spaces over spaces, and main Dry and enclosed
Control and Corridors embarkation incombustible less with 500 square isolated pantries, Machinery cargo water promenades
stations elevator or lowering veneers and combustible feet with pantries with storerooms, spaces spaces tanks (not
enclosures stations trim and fire furnishings combustible incombustible and and safety
resistant and furnishings fittings workshops voids areas)
furnishings isolated
storerooms
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-----------------------------------
Control stations.................. 1 A-60 A-15 A-15 A-0 A-30 A-60 A-60 A-0 A-60 A-60 A-60 A-0 A-0
Stairway and elevator enclosures.. 2 ........ A-0 A-0 A-0 A-0 A-60 A-60 A-0 A-60 A-60 A-60 A-0 A-0
Corridors......................... 3 ........ .......... A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
Lifeboat embarkation or lowering 4 ........ .......... ......... C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 C
stations.........................
Staterooms and all public spaces 5 ........ .......... ......... ........... A-15 A-15 A-15 A-0 A-30 A-30 A-30 A-0 A-0
with incombustible veneers and
trim and fire resistant
furnishings......................
Staterooms and public spaces of 6 ........ .......... ......... ........... ............. A-60 A-60 A-0 A-60 A-60 A-60 A-0 A-0
500 square feet or less with
combustible furnishings, and
isolated storerooms..............
Public spaces over 500 square feet 7 ........ .......... ......... ........... ............. ........... A-60 A-0 A-60 A-60 A-60 A-0 A-0
with combustible furnishings.....
Washrooms, toilet spaces, and 8 ........ .......... ......... ........... ............. ........... ........... A-0 A-0 A-0 A-0 A-0 A-0
isolated pantries with
incombustible fittings...........
Galleys, main pantries, 9 ........ .......... ......... ........... ............. ........... ........... ............. A-0 A-0 A-0 A-0 A-0
storerooms, and workshops........
Machinery spaces.................. 10 ........ .......... ......... ........... ............. ........... ........... ............. ........... A-0 A-0 A-0 A-0
Dry cargo spaces.................. 11 ........ .......... ......... ........... ............. ........... ........... ............. ........... ......... A-0 A-0 A-0
Fuel and water tanks and voids.... 12 ........ .......... ......... ........... ............. ........... ........... ............. ........... ......... ...... A-0 A-0
Open decks and enclosed promenades 13 ........ .......... ......... ........... ............. ........... ........... ............. ........... ......... ...... ..... C
(not safety areas)...............
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Table 72.05-10(e)_Bulkheads_Not Main Vertical Zones
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Staterooms
Staterooms and public
and all spaces of Washrooms Open decks
public spaces 500 square Public toilet Galley, Fuel and
ADJACENT TO Stairway Life boat with feet or spaces over spaces, and main Dry and enclosed
Control and Corridors embarkation incombustible less with 500 square isolated pantries, Machinery cargo water promenades
stations elevator or lowering veneers and combustible feet with pantries with storerooms, spaces spaces tanks (not
enclosures stations trim and fire furnishings combustible incombustible and and safety
resistant and furnishings fittings workshops voids areas)
furnishings isolated
storerooms
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-----------------------------------
Control stations.................. 1 B-0 A-0 A-0 A-0 A-15 A-60 A-60 A-0 A-60 A-60 A-60 A-0 A-0
Stairway and elevator enclosures.. 2 ........ C A-0 A-0 A-0 A-60 A-60 A-0 A-60 A-60 A-60 A-0 A-0
Corridors......................... 3 ........ .......... C A-0 B-0 B-0 A-0 B-0 A-0 A-0 A-0 A-0 A-0
Lifeboat embarkation or lowering 4 ........ .......... ......... C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 C
stations.........................
Staterooms and all public spaces 5 ........ .......... ......... ........... B-0 B-15 A-15 B-0 A-15 A-15 A-15 A-0 A-0
with incombustible veneers and
trim and fire-resistant
furnishings......................
Staterooms and public spaces of 6 ........ .......... ......... ........... ............. B-15 A-30 B-0 A-60 A-60 A-60 A-0 A-0
500 square feet or less with
combustible furnishings, and
isolated storerooms..............
Public spaces over 500 square feet 7 ........ .......... ......... ........... ............. ........... A-60 B-0 A-60 A-60 A-60 A-0 A-0
with combustible furnishings.....
Washrooms, toilet spaces and 8 ........ .......... ......... ........... ............. ........... ........... C A-0 A-0 A-0 A-0 A-0
isolated pantries with
incombustible fittings...........
Galleys, main pantries, 9 ........ .......... ......... ........... ............. ........... ........... ............. C \1\ A-0 A-0 A-0 A-0
storerooms, and workshops........
Machinery spaces.................. 10 ........ .......... ......... ........... ............. ........... ........... ............. ........... C A-0 A-0 A-0
Dry cargo spaces.................. 11 ........ .......... ......... ........... ............. ........... ........... ............. ........... ......... A-0 A-0 A-0
Fuel and water tanks and voids.... 12 ........ .......... ......... ........... ............. ........... ........... ............. ........... ......... ...... A-0 A-0
Open decks and enclosed promenades 13 ........ .......... ......... ........... ............. ........... ........... ............. ........... ......... ...... ..... C
(not safety areas)...............
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Class C bulkheads may be used between two similar spaces, such as between two similar storerooms. However, a Class A-0 bulkhead shall be used between dissimilar spaces, such as a storeroom
and a dissimilar workshop.

Table 72.05-10(f)_Decks_Main Vertical Zones
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Staterooms
Staterooms and public
and all spaces of Washrooms Open decks
public spaces 500 square Public toilet Galley, Fuel and
ADJACENT TO Stairway Life boat with feet or spaces over spaces, and main Dry and enclosed
Control and Corridors embarkation incombustible less with 500 square isolated pantries, Machinery cargo water promenades
stations elevator or lowering veneers and combustible feet with pantries with storerooms, spaces spaces tanks (not
enclosures stations trim and fire furnishings combustible incombustible and and safety
resistant and furnishings fittings workshops voids areas)
furnishings isolated
storerooms
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-----------------------------------
Control stations.................. 1 A-60 A-60 A-30 A-0 A-15 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
Stairway and elevator enclosures.. 2 A-15 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
Corridors......................... 3 A-30 A-0 A-0 A-0 A-0 A-0 A-15 A-0 A-0 A-0 A-0 A-0 A-0
Lifeboat embarkation or lowering 4 A-0 A-0 A-0 C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 C
stations.........................
Staterooms and all public spaces 5 A-30 A-30 A-15 A-0 A-15 A-15 A-30 A-0 A-0 A-0 A-0 A-0 A-0
with incombustible veneers and
trim and fire resistant
furnishings......................
Staterooms and public spaces of 6 A-60 A-60 A-30 A-15 A-15 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
500 square feet or less with
combustible furnishings, and
isolated storerooms..............
Public spaces over 500 square feet 7 A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
with combustible furnishings.....
Washrooms, toilet spaces, and 8 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
isolated pantries with
incombustible fittings...........
Galleys, main pantries, 9 A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
storerooms, and workshops........
Machinery spaces.................. 10 A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
Dry cargo spaces.................. 11 A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
Fuel and water tanks and voids.... 12 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
Open decks and enclosed promenades 13 A-0 A-0 A-0 C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 C
(not safety areas)...............
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Table 72.05-10(g)_Decks_Not Main Vertical Zones
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Staterooms
Staterooms and public
and all spaces of Washrooms Open decks
public spaces 500 square Public toilet Galley, Fuel and
ADJACENT TO Stairway Life boat with feet or spaces over spaces, and main Dry and enclosed
Control and Corridors embarkation incombustible less with 500 square isolated pantries, Machinery cargo water promenades
stations elevator or lowering veneers and combustible feet with pantries with storerooms, spaces spaces tanks (not
enclosures stations trim and fire furnishings combustible incombustible and and safety
resistant and furnishings fittings workshops voids areas)
furnishings isolated
storerooms
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
THIS SPACE:
-----------------------------------
Control stations.................. 1 A-30 A-30 A-15 A-0 A-0 A-15 A-30 A-0 A-0 A-0 A-0 A-0 A-0
Stairway and elevator enclosures.. 2 A-0 C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
Corridors......................... 3 A-15 A-0 A-0 A-0 A-0 A-0 A-15 A-0 A-0 A-0 A-0 A-0 A-0
Lifeboat embarkation or lowering 4 A-0 A-0 A-0 C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 C
stations.........................
Staterooms and all public spaces 5 A-15 A-15 A-0 A-0 A-0 A-0 A-15 A-0 A-0 A-0 A-0 A-0 A-0
with incombustible veneers and
trim and fire resistant
furnishings......................
Staterooms and public spaces of 6 A-60 A-60 A-30 A-15 A-0 A-30 A-60 A-0 A-0 A-0 A-0 A-0 A-0
500 square feet or less with
combustible furnishings and
isolated storerooms..............
Public spaces over 500 square feet 7 A-60 A-60 A-60 A-30 A-15 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
with combustible furnishings.....
Washrooms, toilet spaces, and 8 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
isolated pantries with
incombustible fittings...........
Galleys, main pantries, 9 A-60 A-60 A-60 A-30 A-15 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
storerooms, and workshops........
Machinery spaces.................. 10 A-60 A-60 A-60 A-30 A-15 A-60 A-60 A-0 A-0 C A-0 A-0 A-0
Dry cargo spaces.................. 11 A-60 A-60 A-60 A-30 A-15 A-60 A-60 A-0 A-0 A-0 A-0 A-0 A-0
Fuel and water tanks and voids.... 12 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
Open decks and enclosed promenades 13 A-0 A-0 A-0 C A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 C
(not safety areas)...............
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

(h) Where ceilings or linings are fitted, “B” Class bulkheads, with the exception of those forming passageways, may stop at the ceiling or lining and need not continue to the deck or shell, provided the ceiling and/or lining is erected as indicated in paragraph (j) of this section. However, draft stops meeting at least Class B–0 requirements shall be fitted not more than 45 feet apart between the ceiling or lining and the deck or shell. The space behind the linings of stairways and similar trunks shall have similar draft stops at each deck.

(i) Where Class B–15 bulkhead panels are required to go beyond the ceiling to the deck above, or beyond the lining to the shell, the portion of the bulkhead panel within the void space need only meet B–0 requirements.

(j) Where “B” Class panels are used, all four edges of the panel shall be retained by continuous steel or equivalent metal flanges on both sides of the panel offering at least 3/4 inch coverage. The top and bottom flanges shall be so attached to the structural decks above and below so as to support and restrain the panels in the event of fire. Other methods of construction may be specifically approved by the Commandant if determined to be equivalent.

(k) Any sheathing, furring, or holding pieces incidental to the securing of structural insulation shall be of approved incombustible materials.

(l) Where linings or bulkhead panels are framed away from the shell or structural bulkheads, the deck within the void space so formed need only meet Class A-0 requirements.

(m) Decks within accommodation spaces and inside safety areas may have an overlay for leveling or finishing purposes which need not meet the requirements for an approved deck covering. Such an overlay will not be considered as giving any insulating value and may not in general exceed 3/8 of an inch in thickness. Greater thicknesses may be specifically approved by the Commandant for specific locations.

(n) Rugs and carpets may be used in addition to any deck covering or overlay installed. Rugs and carpets used in stairways or corridors shall be of wool, or other materials having equivalent fire-resistive qualities.

(o) Decking within surgical operating rooms shall be of a type which is acceptably conductive to prevent accumulation of dangerous electrostatic charges, and shall be in general agreement with “Code for Flammable Anesthetics” of issue in effect at the time the construction or alteration of the vessel is contracted for, published by the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269.

(p) Decks in washrooms and toilet spaces, service, cargo, and machinery spaces, open decks, exterior safety areas, and enclosed promenades may have an overlay in any thickness. This overlay need not meet the requirements for an approved deck covering.

[CGFR 65–50, 30 FR 16903, Dec. 30, 1965, as amended by CGD 95–072, 60 FR 50463, Sept. 29, 1995; CGD 95–028, 62 FR 51204, Sept. 30, 1997]

§ 72.05-15 Ceilings, linings, trim, and decorations in accommodation spaces and safety areas.
top
(a) Ceilings and linings and any furring incidental to their erection shall be of approved incombustible materials. Where such ceilings or linings are given credit for their insulating value in obtaining a bulkhead or deck classification they shall be of Class B–15 bulkhead panel material, and the construction shall be as required by §72.05–10(j).

(b) Bulkheads, linings, and ceilings may have a combustible veneer within a room not to exceed 2/28 of an inch in thickness. However, combustible veneers shall not be used in passageways or stairway enclosures, or in spaces specifically restricted by tables 72.05–10 (d) through (g).

(c) The total volume of combustible face trim, moldings, and decorations, including veneers, in any compartment shall not exceed a volume equivalent to 1/10 inch veneer on the combined area of the walls of the compartment. Such trim, molding, or decorations shall not perform any structural function, and shall not be used in corridors or stairway enclosures.

(d) Combustible veneers, trim, decorations, etc., shall not be used in or extend into hidden spaces such as behind linings or ceilings or in the matter of double bulkheads.

(e) Nothing in this subpart shall be construed as prohibiting the covering of any surface with a reasonable number of coats of paint or with a Marine Finish meeting the requirements of subpart 164.012 of subchapter Q (Specifications) of this chapter. This includes corridors, stairway enclosures, and hidden spaces.

(f) Partial bulkheads or decks used to subdivide a space for artistic treatment, privacy, etc., shall meet the requirements of Class C bulkheads.

§ 72.05-20 Stairways, ladders, and elevators.
top
(a)(1) Except as further noted the provisions of this section apply to all vessels.

(2) For small vessels, special consideration for relief may be given where it is shown to be unreasonable or impracticable to meet the detailed requirements for stairway size, slope, dimensioning, and landing area.

(3) Stairways, ladders, and elevators within main machinery spaces or cargo holds are not covered by the general provisions of this section, but shall meet the requirements of paragraph (b) of this section.

(b) Stairways, ladders, and elevators within main machinery spaces and cargo holds shall meet the following requirements:

(1) All stairways, ladders, and elevators shall be of steel.

(2) [Reserved]

(c) Deck penetrations shall meet the following requirements:

(1) Where a continuous vertical deck penetration for a stairway or elevator exceeds one deck, the integrity of all decks involved shall be assured by enclosure bulkheads and decks meeting the applicable requirements of §72.05–10 (d) through (g), and by doors at all levels meeting the requirements of §72.05–25(b)(9).

(2) Where only two decks are served by a stairway or elevator, the integrity of the deck involved may be assured as noted in the preceding paragraph. Alternately, the integrity may be maintained at one level only by means of bulkheads and by doors meeting the requirements of §72.05–25(b)(9). If the latter method is used, it should be noted that the integrity of a deck is involved, and accordingly, the bulkhead classifications should be selected from tables 72.05–10(f) or 72.05–10(g), the spaces above or below being assumed to extend to the bulkheads and doors.

(3) Stairways or elevators to a balcony within a space need not be enclosed, provided the stairway or elevator serves only the space and the balcony within the space.

(d) For the purpose of this section, stairways are identified as follows:

Type 1—Main Vertical Zone enclosed stair towers.

Type 2—Enclosed stairways other than Type 1.

Type 3—Interior stairway not enclosed.

Type 4—Exterior stairways or exterior inclined ladders.

(e) Each Main Vertical Zone shall be served by at least one Type 1 stairway, so that independent of adjoining Main Vertical Zones, escape may be effected from any accommodation space or any other space where persons may be normallyquartered or employed, to ALL other decks having any such spaces within the same Main Vertical Zone without coming out of the stair tower enclosure. Each Type 1 stairway shall give access to the Embarkation Deck or, if the Embarkation Deck does not extend to the portion of the vessel in question, to at least one weather deck from which convenient communication to the Embarkation Deck is provided by means of Type 4 stairways. In cases where a Type 1 stairway is accessible from two Main Vertical Zones, it may be considered as the required Type 1 stairway for both zones provided all boundaries of the stairway meet Main Vertical Zone requirements. (continued)