Imágenes de páginas
PDF
EPUB
[graphic]
[ocr errors]

Control stations.

Stairways and elevator enclosures..
Corridors.

Lifeboat embarkations or lowering station..
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 furnishings..

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
pantries with incombustible fittings....
Galleys, main pantries, storerooms and
workshops.

Motion-picture booths and film lockers.

Machinery spaces...

Isolated fan rooms..

Water tanks and voids.

[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]
[ocr errors]

A-60 A-60 A-30 A-15 A-15 A-60 A-60 A-60 A-60 A-60 A-60 A-0
A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-60 A-60 A-60 A-60 A-0
A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-60 A-60 A-60 A-60 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 A-0
A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-60 A-60 A-60 A-60 A-0
A-60 A-60 A-60 A-60 A-30 A-60 A-60 A-60 A-60 A-60 A-60 A-0 A-60 A-60 A-60 A-60
A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-60 A-60 A-60 A-60 A-0 A-0 A-60 A-0
A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-60 A-60 A-60 A-60 A-0 A-0 A-60 A-
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 A-60 A-0
A-60 A-60 A-60 A-30 A-30 A-60 A-60 A-60 A-60 A-60 A-60 A-0 A-0 A-60 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 A-0 A-0 A-0
A-0 A-0 A-0 C
A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0 A-0
FIGURE 144.09 (1). Decks forming part of a stepped main vertical zone bulkhead.

[graphic][subsumed][subsumed][subsumed][ocr errors][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][ocr errors][subsumed][ocr errors][ocr errors][subsumed][subsumed][subsumed][subsumed]

of stepped main vertical zones, shall be as noted in Figure 144.09 (g).

(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. However, draft stops shall be fitted between the ceiling or lining and the deck or shell such that the maximum fore and aft length of the inclosed space shall not exceed 66 feet.

(i) Where Class B-15 panels are used, they should be efficiently secured by steel or equivalent metal flanges offering at least 34 inch coverage of the panel. Other equivalent methods of construction will be specifically approved by the Commandant.

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

(k) Decks within accommodation spaces and 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 % of an inch in thickness. Greater thicknesses may be specifically approved by the Commandant for specific locations.

(1) 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 material having equivalent fireresistive qualities.

(m) Overlays within surgical operating rooms shall be of a type which is acceptably conductive in nature to prevent static discharges when heavy concentrations of ether may be present in the air.

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

§ 144.11 Ceilings, linings, trim, and decorations in accommodation spaces and safety areas. (a) Ceilings and linings and any furring incidental to their erection shall be of approved incombustible materials.

(b) Class B-15 bulkhead panels may have a combustible veneer on each side

not exceeding 28 of an inch in thickness. However, combustible veneers shall not be used in passageways or stairway inclosures.

(c) The total board feet of combustible face trim, moldings, and decorations, including veneers, in any compartment shall not exceed 10 percent of a figure representing the total square feet of the combined walls and ceiling of the compartment. Such trim, molding, or decorations shall not perform any structural function, and shall not be used in corridors or stairway inclosures.

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

§ 144.13 Escapes. (a) In each main vertical zone there shall be at least one stairway serving all accommodation and working spaces. Except in machinery spaces, such stairway shall be inclosed so that escape may be made from any deck to the weather or embarkation decks without coming out of the stairway inclosure. There shall also be provided an additional horizontal or emergency vertical escape from each horizontal zone in such spaces.

(b) Stairways and elevators shall be inclosed in "A" Class bulkheads and decks except as noted below:

(1) A stairway or elevator serving only two decks need not be inclosed provided the integrity of the deck is maintained by proper bulkheads or doors at one level.

(2) Stairways may be fitted in the open in a public space provided they lie wholly within such space. However, such stairways may not serve as one of the required means of escape from such space.

(c) The stringers, treads, and risers of all stairways shall be of steel or equivalent metal construction. Balustrade and trim shall be of approved incombustible materials.

(d) Elevators shall not be considered as one of the required means of escape.

§ 144.15 Doors. (a) Doors shall have certain required characteristics depending upon the type of bulkhead in which it is fitted and the location in which it is used. If it is desired to use decorative doors in addition to the doors specified, 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 14 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 31⁄2 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-0 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 4 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 11⁄4 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.

(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 4 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 8 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 necessity 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 minutes. 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 affected by the ventilation system.

[CGFR 47-5, 12 F. R. 808, as amended by CGFR 47-57, 12 F. R. 8347]

« AnteriorContinuar »