gas of the type required by the regulations in this part to have valve protection cap fitted in place on the cylinder may be transported on board ferry vessels without having the valve protection cap in place when said cylinders are laden in highway vehicles and are not removed from the vehicles while on board the vessel.

§ 146.08-11 Motor vehicles having refrigerating or heating equipment. (a) Motor vehicles, fitted with refrigerating or heating equipment using an inflammable liquid or gas as fuel, may be accepted for transportation, and such refrigerating or heating equipment may be operated while the vehicle is on board a vessel, provided the installation conforms with the following requirements:

(1) The installation is rigidly mounted and free of any movement other than normal vibration of operation.

(2) A shut-off control, easily accessible to the operator of the vehicle, is fitted to the fuel and electrical supply of refrigerating or heating equipment.

(3) The fuel storage tank, the fuel lines and the carburetor or other device shall be tight and show no signs of leakage.

(b) Refrigerating or heating equipment not fitted with automatic starting and stopping devices shall, if the vehicle operator desires the equipment to operate while on board the vessel, be started before the vehicle is taken on board. It may continue in operation while the vehicle is on the vessel, but if for any cause the motor ceases to operate it shall not be restarted until after the vehicle leaves the vessel.

(c) Vessels on voyages exceeding thirty (30) minutes' duration shall provide a stowage for vehicles having refrigerating or heating equipment operated by internal combustion engines as will permit ready diffusion of exhaust gases to the open air. Passenger vehicles shall not be stowed in a position adjacent to vehicles operating internal combustion motors as would expose the occupants thereof to excessive concentrations of exhaust fumes from such motors.

(d) The master or person in charge of a vessel may, when he deems it necessary for any cause, require the vehicle operator to stop the operation of re

frigerating or heating equipment attached to a vehicle while on board the vessel.

[CGFR 52-41, 17 F. R. 10311, Nov. 13, 1952] SUBPART-CARGO HANDLING AND STOWAGE DEVICES, U. S. COAST GUARD CONTAINER SPECIFICATIONS

SOURCE: 146.09-1 to 146.09-12 contained in Order 74, 6 F. R. 277, Jan. 11, 1941, except as otherwise noted.

§ 146.09-1 Magazines, location of. (a) Magazines shall be located in a hold, preferably an upper tween deck hold. They shall be so located as not to be in horizontal proximity to crew or passenger accommodations, nor below such living spaces. The term "tween deck" means all closed-in spaces below an uppermost deck in which a cargo hatch is fitted, which spaces are bounded by permanent bulkheads, and through which there can be no traffic while at sea, and such spaces being included in the gross tonnage of a ship.

(b) Magazines may, upon approval by the Commandant of the Coast Guard, be built in a poop or shelter deck when it is included in the gross tonnage, and when not so included in the gross tonnage provided the openings are effectively closed and such poop contains no kind of crew accommodations or stores and is so closed off it is not liable to excessive temperature rises due to proximity of stack or uptakes. Magazines shall not be built on or under the principal bridge, whether included in the tonnage or not. Magazines may be built in the square of the hatchway in conformity with the provisions of paragraph (d) of this section. The stowage of smoke, incendiary and chemical shells without detonating ignition elements or explosive charges in the shelter deck is permitted under the conditions as set forth under Chemical Ammunition.

(c) Magazines shall not be constructed in bearing with the collision bulkhead, nor with a bulkhead forming a boiler room, engine room, coal bunker, or galley boundary. If it is necessary to construct a magazine in proximity to these bulkheads, a cofferdam space of at least four feet shall be provided between the bulkhead and the magazine side. This cofferdam space shall remain open to the free circulation of air, and no cargo shall be stowed as to hinder or obstruct such circulation of air. The height of magazines shall not exceed the normal tween deck height of contiguous decks, except

by special permission of the Commandant of the Coast Guard. Magazines shall be so located that their doors are easily accessible from the hatchway. Proposed construction of magazines, in locations other than in holds of ships, shall require an approval by the Commandant of the Coast Guard. Magazines may, upon approval of the Commandant of the Coast Guard, be built out to the sides of the vessel, but under such construction, the vessel's side plating and frames shall be sheathed with wood to provide a smooth bearing surface for the stowed cargo of explosives.

(d) When a magazine is to be constructed over a tween deck hatch, the hatch girders or strongbacks and the hatch covers forming the tween deck hatch shall be of such design and size as to insure their carrying the imposed load with safety. Covers of the tween deck and over deck hatch shall completely close the hatch opening and fit securely in place. Tween deck hatch covers of wood forming the base of the magazine shall be completely covered with asbestos board at least 4" thick, fitted tight at the sides of the magazine, the joints of the asbestos board being staggered midway between joints formed by the wooden hatch covers. Magazines shall be constructed in accordance with the applicable provisions of § 146.09-2, except floor shall be formed by dunnaging over the asbestos board. In the construction of a magazine care should be taken that no metal structural parts protrude within the magazine. If it is proposed to carry the stowage of explosives up into the over deck hatch coaming, this coaming shall be sheathed with wood. A magazine located in the hatchway may be so constructed as to occupy only a part of the area of the hatchway. Portable magazines may be stowed in the square of the hatchway and either lashed or tommed to prevent movement. [Order 74, 6 F. R. 277, Jan. 11, 1941, as amended by Order 113, 6 F. R. 2413, May 14, 1941; CGFR 47-35, 12 F. R. 4184, June 27, 1947]

line. When steel or iron decks are utilized to form the bottom of the magazines, a wooden floor shall be fitted; such floor may be portable and may be built in sections so as to be readily removable to allow access for cleaning.

(b) Magazines of wood; magazines constructed of wood shall comply with the following specifications:

(1) The bulkheads forming the sides and ends shall be constructed of milled commercial 1" quality lumber, dressed on one side and both edges to not less than " minimum finished dressed dimensions, or commercial grade plywood of a thickness not less than 34" secured to uprights of at least a 3" x 4" size, spaced not more than 18" apart, and similarly secured, top, bottom and center, with horizontal bracing. Copper or cement coated nails with heads carefully set below the surface of the boards shall be used for fastening. When a magazine is constructed as a permanent compartment in the ship, increase size and finish of lumber and other methods of fastening may be used, provided they are recessed below the surface to avoid projections within the interior of the magazine. All boarding shall be so fitted and finished as to form a smooth surface within the interior of the magazine. Construction shall be such as to separate all containers of explosives from contact with metal surfaces. When a metal stanchion post or other obstruction is located within the interior area of the magazine, such obstruction must be completely covered with wood of a thickness of at least 3/4", secured in place with copper or cement coated nails or brass screws, with heads set below the surface of the wood.

(2) Uprights shall not be stepped directly onto a metal deck. A 3" x 4" bearer to carry the uprights shall be laid upon the metal deck. A 3" x 4" header shall be fitted against the underside of an overhead deck to receive the tops of uprights. Tops of uprights fitted against channel beams may be wedged direct to the beam with 3" x 4" spacers fitted between. Care shall be taken in securing upright framing that no nails penetrate to the interior of the magazine.

(3) Flooring of magazines shall be of not less than 11⁄4" stock, constructed on bearers and fitted portable (but tight to prevent movement).

(4) The door of the magazine shall be of substantial construction, fitted reasonably tight into its jamb, and be provided with locking means of a tamperproof type.

[Order 74, 6 F. R. 277, Jan. 11, 1941, as amended by CGFR 57-33, 22 F. R. 8571, Oct. 29, 1957; CGFR 57-49, 22 F. R. 10062, Dec. 14, 1957]

§ 146.09-3 Entire hold forming magazine. When an entire compartment or hold is utilized for the stowage of explosives that are required by the regulations in this part to be given magazine stowage, the entire compartment may be considered as a magazine. The frames and bulkhead stiffeners protruding into the compartment shall be effectively boarded over to provide a smooth surface for the stowage of the explosives. This boarding need not be applied to the over deck beams when the explosives are not stowed closer than twelve (12) inches of such beams. If explosives are stowed up to the over deck beams and into the square of the hatch formed by the coaming such over deck beams including the hatch coaming shall be effectively boarded over. The installation of such boarding shall be in accordance with the specifications for the construction of a magazine, except when cargo battens are fitted to the vessel's shell or bulkheads forming part of the hold such boarding may be secured vertically using the battens as an anchorage for the necessary securing means.

§ 146.09-4 Ventilation of magazines. Every magazine shall be efficiently ventilated. Cowl deck ventilators, when fitted into or immediately adjacent to the magazine, shall be covered with a fine wire screen of not less than a 30 x 30 mesh at the weather end of the ventilator. Magazines which occupy only a portion of a hold and are not fitted with a ventilator entering into the magazine shall be so constructed on one side as to leave an open space of not more than one inch below the over deck frame.

§ 146.09-5 Metal lockers for stowage of fireworks. Metal lockers required to be provided for the stowage of fireworks (class B-less dangerous explosives), permitted by the regulations in this part to be accepted and transported on board passenger vessels, shall conform to the following specifications:

(a) Size. The cubic capacity of a locker shall not exceed 150 cubic feet.

(b) Division. Lockers exceeding 5 feet in height shall be fitted with a division shelf at about 1⁄2 height so constructed as to carry the imposed load without deflection.

(c) Gauge. The thickness of metal used in the construction of lockers shall not be less than No. 16 U. S. standard gauge.

(d) Type of construction. Design and construction of lockers shall be such as to provide smooth interior surfaces. Stiffener elements, when fitted, shall not project beyond interior surfaces. Lockers shall be fitted with top and bottom closures except when "built in" to the structure of the vessels with the over and under deck forming the top and bottom of the locker. "Built in" construction shall not be accepted when the over or under deck is of wood.

(e) Closures. Closing means may be removable plates or the hinged door type, provided that in either case the locker shall, when closed in, be flame tight. Lockers having portable plate closing means shall have an opening provided in an accessible side of the locker to permit insertion of a fire hose nozzle for purpose of flooding. Such opening shall be of at least 3" in diameter, not more than 12" below the top of the locker, and be fitted with a metal flap cover to substantially preserve the flame tight requirement.

(f) Location. Lockers shall be so located as to be readily accessible to companionways or cargo hatches. When fitted in vessels constructed of wood the lockers shall be so located as to be easily observed by a watchman on his rounds. Lockers shall be secured in place to prevent shifting in a seaway.

§ 146.09-6 Portable magazine chest and portable magazine containers. (a) Portable magazine chests shall be constructed of metal and lined with wood, and not less than 6 nor more than 40 cubic feet capacity. The lining shall be so fitted and finished as to form a smooth surface within the interior of the chest. Fastenings shall be recessed below the surface to avoid projections within the interior. Construction shall be such as to separate all containers of explosives or pyrotechnics from contact

with metal surfaces. The metal shall be 8 inch thick and free from crimps, buckles, and rough edges. All metal surfaces shall be wire brushed and all oil, grease, rust, loose scale, and other extraneous matter, removed before application of any primer. All surfaces of the metal chest and fittings shall be given a heavy coat of quick drying red lead, zinc chromate, or other suitable primer before painting. The finish shall consist of two coats of paint. The interior shall be lined with wood sheathing of a minimum thickness of 3/4 inch. Securing means shall be countersunk below the surface of the sheathing. Securing means for the cover and four (4) lashing rings shall be provided. The lashing rings shall be 3-inch I. D. x %-inch wire permanently attached to the magazine chest. Two runners, not less than 2 inches high shall be permanently attached to the bottom of the chest.

(b) Portable magazine chests used for the stowage of pyrotechnic signals, rockets, and powder for line-throwing guns shall be marked, in letters at least 3 inches high, with the following legend: "PORTABLE MAGAZINE CHEST," "INFLAMMABLE-KEEP LIGHTS AND FIRE AWAY.”

(c) Portable magazine chests now in use on vessels may be continued in use while in serviceable condition.

(d) Portable magazine containers may be used in the transportation of explosives packaged in specification containers, under such conditions of construction, handling and stowage that meet the approval of the Commandant of the Coast Guard.

[CGFR 49-43, 15 F. R. 112, Jan. 11, 1950, as amended by CGFR 56-29, 21 F. R. 7055, Sept. 20, 1956]

§ 146.09-7 Specifications of moisture proofed paper bags.

SPECIFICATION MIN-W10

MOISTURE PROOFED MULTIWALL PAPER BAGS FOR TRANSPORTATION OF QUICKLIME BY WATER

General

1. Compliance. Containers must comply with, or may exceed, details of the specifications.

2. Capacity. Not over 100 pounds net.

Material

3. Paper. Kraft (100% sulfate) paper. 4. Moisture proofing. Asphalt or other material equal or superior tɔ asphalt.

Construction

5. (a) Description. A multiwall paper bag constructed of not less than four plies, one or more of which will be moisture proofed.

(b) Assembly of moisture proofed ply. The assembly of the moisture proofed ply will be accomplished by combining two sheets of Kraft (100% sulfate) paper having a basis weight of not less than 20 pounds each with not less than 25 pounds of asphalt applied evenly to the paper surface.

(c) Alternate moisture proofed ply. Any other moisture proofed Kraft paper of a total basis weight of not less than 40 pounds before treatment, whose moisture proofed qualities are equal or superior to the above asphalt treated paper as determined by the Thwing Vapometer test for moisture-vapor transmission.

(d) Additional plies. Remaining plies of the bag will be constructed of Kraft (100%) sulfate paper, each sheet having a basis weight of not less than 40 pounds, and a Kady or Mullen test of 40 pounds per square inch. The combined weight of said remaining plies to be not less than the weights given in the following table:

Approximate weight of contents:

Combined weight of remaining plies in addition to moisture proofed ply described in (5) (b) 130 pounds

To and including 50 pounds. 51 pounds to and including 80 pounds----.

150 pounds

170 pounds

81 pounds to and including 100 pounds_-_-. All weights given are on the basis of 480 (24 x 36 inch) sheets.

(e) Longitudinal seams. Longitudinal seams made by lapping not less than one inch and pasting.

(f) Bottom closure. Bottom closure made by folding and interlapping and pasting; or taped sewed and dipped in a waterproofing compound; or sewed and taped over stitching.

(g) Top closure. By wire ties consisting of not less than two No. 16 Birmingham wire gauge or heavier wires; or by valve mouth with top of bag folded and interlapped and pasted; or by valve mouth with top of bag taped, sewed and dipped in waterproofing compound; or sewed and taped over stitching. 6. Test. The finished container, filled and closed, must be capable of withstanding a drop test of 4 feet on the butt without sifting or rupture of any ply.

Marking

7. On each container. By marks at least one inch high as follows:

(a) Min-W10. This marking shall be understood to certify that the container complies with all specification requirements.

(b) Name and address of maker located above or below the mark specified in (7) (a).

§ 146.09-8 Specifications of moisture proofed paper lined burlap bags.

SPECIFICATION MIN-W11

MOISTURE PROOFED PAPER LINED BURLAP BAGS FOR TRANSPORTATION OF QUICKLIME BY WATER

General

1. Compliance. Containers must comply with, or may exceed, details of the specifications.

2. Capacity. Not over 100 pounds net.

Material

3. Burlap. At least equal in equality and strength to 71⁄2 ounce 40 inch (72/40) Calcutta common burlap. Thread count at least 9 per inch warp and 9 per inch filler.

4. Paper. No. 1 Kraft creped. Finished weight of 40 pounds per ream (480 sheets 24 x 36 inch) after creping.

Construction

5. (a) Description. Burlap bag lined with a water proofed paper lining.

(b) Assembly of moisture proofed lining. The assembly of the moisture proofed lining will be accomplished by combining two plies of creped paper having a finished weight of not less than 40 pounds each, evenly coated between the two plies with asphalt of any desirable type, of minimum 150° F. melting point, over the entire area of paper, with minimum coverage of 110 pounds per ream.

(c) Assembly of moisture proofed ply and burlap. The burlap will be lined with the moisture proofed creped paper by cementing together with a suitable latex compounded adhesive to securely attach paper lining to the burlap.

(d) Stretch of paper lining. After they are cemented to the burlap the stretch of the paper lining must equal the stretch of the burlap in the direction of the warp and filling and equal to 10 percent in a diagonal direction.

(e) Seams. Bags must be made with cemented center seams and taped bottoms to make them sift proof and airtight and to provide strength at least equal to the bag material,

(f) Closure. Bags to be wire tied with two No. 16 Birmingham wire gauge or heavier wire ties.

6. Test. The finished container, filled and closed, must be capable of withstanding a drop test of 4 feet on the butt without sifting or rupture of any ply.

Marking

7. On each container. By marks at least 1 inch high as follows:

(a) MIN-W11. This marking shall be understood to certify that the container complies with all specification requirements.

(b) Name and address of maker located above or below the mark specified in (7) (a).

§ 146.09-11 Chutes and conveyors for handling explosives. (a) Chutes for loading and unloading explosives shall be constructed as follows: Of smooth planed boards not less than 1" thick. Side guards of the same material 4'' high. Assembly shall be with brass screws only. D-shaped wooden strips or runners not more than 6" apart and running lengthwise of the chute shall be fastened to the upper surface of the slide by means of glue and wooden dowels extended through the bottom of the chute. No metallic means of construction shall protrude beyond the inner face of the chute. Four lashing rings shall be provided, one at each outside corner of the chute for purposes of securing during use. No specification marking required.

(b) Roller conveyors constructed of aluminum or other non-sparking material may be used for loading or unloading explosives. The conveyor shall be grounded when in use, and suitable brakes provided when the angle of descent is such as to make them necessary.

(c) Powered conveyors may be used when the design, construction and specifications are approved by the Commandant of the Coast Guard.

[CGFR 56-29, 21 F. R. 7055, Sept. 20, 1956]

§ 146.09-12 Mattresses for explosives. Landing mattress for loading or unloading explosives. A stuffed mattress at least 4' wide by 6' long and not less than 4" thick, or a heavy jute or hemp mat of like dimensions, are acceptable landing mattresses.

SUBPART-BARGES

SOURCE: §§ 146.10-1 to 146.10-50 contained in Order 74, 6 F. R. 280, Jan. 11, 1941, except as otherwise noted.

§ 146.10-1 Barge defined. (See § 146.03-36.)

§ 146.10-2 Application of regulations. In the transportation of explosives or other dangerous articles or substances on board barges the provisions of the regulations in this part applying to cargo vessels are applicable to barges unless specifically exempted and except as to stowage. Stowage shall be in accordance with the provisions shown in the table in § 146.1050.