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FIGURE 144.09 (1). Decks forming part of a stepped main vertical zone bulkhead.

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Control stations
Stairways and elevator enclosures.
Corridors
Lifeboat embarkation or lowering stations
Staterooms and all public spaces with in-
combustible furnishings, veneers, trim,

drapes, rugs, etc..
Staterooms and public spaces under 500
square feet with incombustible furnish-

ings.
Public spaces from 500 square feet to 3,000
square feet with incombustible furnish-

ings.
Public spaces over 3,000 square feet with

incombustible furnishings.
Staterooms and public spaces under 500

square feet with combustible furnishings

and isolated storerooms.
Public spaces from 500 square feet to 3,000

square feet with combustible furnishings.
Public spaces over 3,000 square feet with

combustible furnishings.
Washrooms, toilet spaces and isolated pan-

tries with incombustible fittings..
Galleys; main pantries, storerooms and

workshops..
Motion-picture booths and film lockers..
Machinery spaces...
Fuel tanks.
Isolated fan rooms.
Cargo spaces and cargo oil tanks.
Water tanks and voids.
Open decks and enclosed promenades (not

safety area).

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FIGURE 144.09 (g). Decks not forming part of a stepped main vertical zone bulkhead.

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of stepped main vertical zones, shall be not exceeding 328 of an inch in thickness. as noted in Figure 144.09 (g).

However, combustible veneers shall not (h) Where ceilings or linings are fitted,

be used in passageways or stairway inB” Class bulkheads, with the exception

closures. of those forming passageways, may stop

(c) The total board feet of combustible at the ceiling or lining and need not con face trim, moldings, and decorations, intinue to the deck or shell. However, cluding veneers, in any compartment draft stops shall be fitted between the shall not exceed 10 percent of a figure ceiling or lining and the deck or shell representing the total square feet of the such that the maximum fore and aft, combined walls and ceiling of the comlength of the inclosed space shall not ex partment. Such trim, molding, or decoceed 66 feet.

rations shall not perform any structural (i) Where Class B-15 panels are used,

function, and shall not be used in corrithey should be efficiently secured by steel

dors or stairway inclosures. or equivalent metal flanges offering at (d) Any partial bulkheads or decks least 34 inch coverage of the panel. used to subdivide a space for artistic Other equivalent methods of construc treatment, privacy, etc., shall meet the tion will be specifically approved by the requirements of Class C bulkheads. Commandant.

$ 144.13 Escapes. (a) In each main (j) Any sheathing, furring, or holding vertical zone there shall be at least one pieces incidental to the securing of struc

stairway serving all accommodation and tural insulation shall be of approved in working spaces. Except in machinery combustible materials.

spaces, such stairway shall be inclosed so (k) Decks within accommodation that escape may be made from any deck spaces and safety areas may have an to the weather or embarkation decks overlay for leveling or finishing purposes without coming out of the stairway inwhich need not meet the requirements closure. There shall also be provided an for an approved deck covering. Such an additional horizontal or emergency vertioverlay will not be considered as giving cal escape from each horizontal zone in any insulating value and may not in

such spaces. general exceed 38 of an inch in thickness.

(b) Stairways and elevators shall be Greater thicknesses may be specifically approved by the Commandant for specific

inclosed in "A" Class bulkheads and locations.

decks except as noted below: (1) Rugs and carpets may be used in

(1) A stairway or elevator serving only addition to any deck covering or overlay

two decks need not be inclosed provided installed. Rugs and carpets used in

the integrity of the deck is maintained stairways or corridors shall be of wool,

by proper bulkheads or doors at one or other material having equivalent fire

level. resistive qualities.

(2) Stairways may be fitted in the (m) Overlays within surgical operating

open in a public space provided they rooms shall be of a type which is ac

lie wholly within such space. However, ceptably conductive in nature to prevent

such stairways may not serve as one static discharges when heavy concentra

of the required means of escape from tions of ether may be present in the air.

such space. (n) Decks in washrooms and toilet (c) The stringers, treads, and risers spaces, service, cargo, and machinery of all stairways shall be of steel or spaces, and open decks may have an equivalent metal construction. Balusoverlay in any thickness. This overlay trade and trim shall be of approved inneed not meet the requirements for an

combustible materials. approved deck covering.

(d) Elevators shall not be considered § 144.11 Ceilings, linings, trim, and

as one of the required means of escape. decorations in accommodation spaces and § 144.15 Doors. (a) Doors shall have safety areas. (a) Ceilings and linings certain required characteristics dependand any furring incidental to their erec ing upon the type of bulkhead in which tion shall be of approved incombustible it is fitted and the location in which it materials.

is used. If it is desired to use decorative (b) Class B-15 bulkhead panels may doors in addition to the doors specified, have a combustible veneer on each side they shall be constructed of incombus

tible materials and shall not interfere with the operation of the required doors.

(b) All doors shall be capable of being opened from either side by one person. In public spaces, stairway inclosures, etc., the door shall open in the direction of escape.

(c) Doors from service, cargo, machinery, and accommodation spaces leading out onto open decks shall be constructed either of hardwood at least 134 inches thick or of steel. Glass may be used in such doors which open onto safety areas, and if used, it shall be of the wire-inserted type retained by metal glazing beads or angles. Where such doors are fitted between safety areas and accommodation spaces containing incombustible furnishings, veneers, trim, drapes, rugs, etc., plain glass will be satisfactory.

(d) Doors in main vertical zone bulkheads and stairway inclosures shall be of the self-closing type, capable of closing against a list of 342 degrees. Such doors, except those which are normally closed, shall be of a type which are capable of release from the control station and from a position at the door. The release mechanism shall be so designed as to automatically close the door in the event of disruption to the control system. Holdback hooks, or other means of permanently holding the door open not subject to control station release, will not be permitted.

(e) Doors in bulkheads required to be Class A-60, A-30, or A-15 shall meet the following requirements:

(1) The doors shall be hollow steel or other equivalent metal construction solidly filled with approved structural insulation capable of meeting the requirements for a Class A-15 bulkhead.

(2) Doors may be fitted with not more than 100 square inches of wire inserted glass retained by a metal glazing bead or angle.

(f) Doors in bulkheads required to be Class A-0 shall meet the following requirement, except as provided in paragraph (c) of this section:

(1) The doors shall be solid or hollow steel or other equivalent metal construction capable of meeting the requirements for a Class A-0 bulkhead.

(2) Doors may be fitted with not more than 100 square inches of wire inserted glass retained by a metal glazing bead or angle.

(g) Doors in bulkheads required to be Class B-15 or B-O shall meet the following requirements:

(1) Doors may be constructed of the following materials:

(i) Hollow steel or other equivalent metal construction.

(ii) Steel or other equivalent metal frame with 14 inch thick wire inserted glass panes retained by metal glazing bead or angle.

(iii) Solid hardwood with metal or hard asbestos veneer on both sides. Total thickness to be at least 144 inches.

(2) Doors may have combustible veneers on each side not to exceed 2/28 of an inch in thickness, but such veneers shall not be used on the corridor side of a door.

(3) Doors may have vent grilles not to exceed two square feet in area.

(h) Doors fitted in bulkheads required to be Class C shall be of approved incombustible materials or may be of any of the types required by paragraphs (e), (f), or (g) of this section. (CGFR 47-5, 12 F. R. 808, as amended by CGFR 47-57, 12 F. R. 8347]

$ 144.17 Windows. (a) All windows shall have steel or other equivalent metal frames. The glass shall be retained by a metal glazing bead or other satisfactory means which will insure the whole structure of the window being fireproof.

(b) Windows or airports opening from service, cargo, or machinery spaces or from accommodation spaces other than those containing incombustible furnishings, veneers, trim, drapes, rugs, etc., onto safety areas, and windows within accommodation spaces shall be fitted with wire-inserted glass. (CGFR 47–5, 12 F. R. 808, as amended by CGFR 47–57, 12 F. R. 8347]

$ 144.19 Hatch covers and shifting boards. (a) Wood hatch covers may be used between cargo spaces. Hatch covers in other locations shall meet the requirements for deck construction noted in § 144.09 (f) and (g).

(b) Shifting boards in tonnage openings shall be of approved incombustible materials,

§ 144.21 Heat and refrigeration insulation. (a) Heat insulation on bulkheads, decks, and ventilation trunks and any materials incidental to its installation shall be of approved incombustible materials.

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(b) Refrigeration insulation on bulkheads, decks, and ventilation trunks and the materials incidental to its installation need not be incombustible. However, granulated cork which will pass through a 14 inch mesh, or any other material of equal or greater combustibility, shall not be permitted.

$ 144.23 Paint. (a) An excessive number of coats of paint will be discouraged unless noncombustible paint is used.

(b) Nitro-cellulose or other highly flammable or noxious fume-producing paints or lacquers shall not be used.

$ 144.25 Ventilation. (a) Where automatic fire dampers are required, they shall be designed to operate at 165° F. and shall be made accessible by means of a hinged or bolted plate in the duct. The damper and the portion of duct containing the damper shall be constructed of at least 18 inch steel plate suitably stiffened. No insulation need be applied to damper.

(b) Where ventilation ducts are required to meet bulkhead requirements, the space within the duct shall be considered to be the same as the space served by the ventilator, and the duct shall be insulated to meet the applicable requirements of § 144.09 (d) and (e).

(c) All ventilation systems shall be designed, where practicable, so that all ducts leading to the various inclosures are kept within the main vertical zones. No duct may serve spaces in more than one main vertical zone.

(d) Where of necessit. ducts pass through main vertical zone bulkheads, automatic fire dampers shall be fitted adjacent to the bulkhead. The duct between the bulkhead and the damper shall meet the applicable bulkhead requirements.

(e) Ventilation ducts serving cargo or machinery spaces which pass through accommodation spaces or safety areas shall be fitted with an automatic fire damper adjacent to the point of entry. Between the bulkhead or deck and the damper, and in addition, on vertical ducts for a distance of 6 feet above the damper, the duct shall meet the applicable bulkhead requirements.

(f) Exhausts from galleys shall meet the applicable bulkhead requirements.

(g) Motion picture projection rooms shall be equipped with mechanical ven

tilation to the open air to produce a complete change of air every three min. utes. The air inlets shall be at the bottom of the space and the mechanical exhaust shall be as near the top as practicable with the exception that a 6-inch duct shall be led directly over the lamp housing of each projector. The ventilation ducts outside the projection room shall meet the applicable bulkhead requirements. Fan motors shall either be kept clear of the path of the exhaust or shall be of the explosion proof type.

(h) Film storage lockers shall have an outlet to the open air with a total area of at least 1 square inch for each 5 pounds of film for which there is storage space. The duct shall meet the bulkhead requirements.

(i) In all ventilation systems, manually operated dampers or other suitable means shall be provided in an accessible location for shutting off the passage of air in the event of fire; however no dampers shall be placed in exhaust ducts from film lockers or projection rooms.

(j) All electrical ventilation systems shall be provided with means for stopping the motors in case of fire or other emergency. For each system there shall be provided two emergency control stations; for the machinery space ventilation, one of these two stations shall be in the fire control room or wheelhouse, and the second in the passageway leading to the machinery space; for all other ventilation systems, one of these two stations shall be in the fire control room or wheelhouse, and the second shall be located as distant as practicable, except that the main bus feeding power to the equipment for these systems may be considered as the second station. These emergency control pushbutton stations shall be protected by installing glass doors on which there will be marked “in case of fire break glass and push button to stop ventilation." Each pushbutton shall be provided with a name plate identifying the system with which it is associated. This remote control system shall be of the undervoltage protection type and so arranged that damage to the master switch or cable will automatically stop the fans. Steam-powered ventilation systems shall have a remote control for the steam valve located in an accessible location outside the space af. fected by the ventilation system. (CGFR 47-5, 12 F. R. 808, as amended by CGFR 47–57, 12 F. R. 8347]

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