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deck or overhead. A 2" x 6" bearer to carry the upright shall be laid on the metal deck, and a 2′′ x 6′′ header shall be fitted against the underside of the overhead deck to receive the top of uprights. Top of uprights fitted against overhead deck beams may be wedged direct to the beam with 2" x 4" spacers fitted between. Suitable horizontal stringers shall be fitted between temporary and permanent bulkhead at the top and bottom, as well as intermediate stringers spaced a maximum of 5 feet. Uprights shall be securely fastened to horizontal stringers or horizontally braced at the top, bottom and center.

(3) When the permanent bulkhead stiffeners are on the cargo side, suitable uprights of not less than 2" x 4" may be installed against the permanent vertical stiffeners to give the required 12 inches off the bulkhead. If the permanent stiffeners are over 30 inches apart, center to center, 21⁄2-inch boarding shall be used. Uprights shall be stepped and braced as required by the provisions of paragraph (b)(2) of this section. Bulkhead stiffeners that do not extend the full depth of the cargo space shall not be used for this purpose.

(4) Other methods of construction using steel or wooden uprights, bolted to plates or lugs welded to deck beams, decks, or tank tops may be used provided the strength is equivalent to that obtained by the foregoing methods of construction.

(c) Stowage provided for military explosives shall be dry and except for deep tanks well ventilated.

(d) Ammunition as cargo shall not be stowed within a distance of 10 feet of a vessel's radio shack, receiving or transmitting apparatus, radio antenna or antenna lead-in. The same restriction applies to radar equipment.

[CGFR 62-11, 27 FR 5287, June 5, 1962, as amended by CGFR 67-23, 32 FR 8159, June 7, 1967]

§ 146.29-77 Allocation of stowage.

Military explosives that are tendered to a vessel for transportation as cargo shall be stowed on board the vessel utilizing the type of stowage authorized for the particular ammunition or

explosives in bulk by the provisions of § 146.29-100.

§ 146.29-79 Types of stowage.

The types of stowage prescribed for military explosives are described as follows:

(a) Magazine stowage A.
(b) Ammunition stowage.

(c) Chemical ammunition stowage.
(d) Special stowage.

(e) Portable magazine stowage. (f) Pyrotechnic stowage.

(g) Stowage of blasting caps, detonators, primer detonators, etc. (h) Deck box and van.

8146.29-81 Magazine Stowage A.

The following shall be observed in the construction of a magazine required by the table in § 146.29-100 for "Magazine A" type of stowage:

(a) Magazines may be constructed of steel or wood.

(b) Magazines constructed of steel shall have the whole of the interior thoroughly protected by wood dunnage of a minimum thickness of 3⁄4 inch. This lining may be installed during the progress of the stowage. Metal stanchions within the magazine shall be boxed with wood of a thickness of not less than 4 inch. Boxing of portable non-ferrous dunnage system stanchions is not required. Bulkhead stiffeners or other structural members extending into the stowage spaces shall not be protected by dunnaging but shall be completely boarded over. When bare steel decks or tank tops &re utilized to form the floor of a magazine, a wooden floor consisting of at least two layers of commercial 1-inch thick dunnaging shall be laid, the top course being laid crosswise to the lower course. When steel decks or tank tops are originally fitted with a wood flooring or are ceiled, it shall be necessary to fit one course of dunnage. All flooring formed by these methods shall be laid with commercial 1-inch lumber of widths not less than 4 inches, fitted as close as possible, edge to edge and butt to butt.

(c) Magazines constructed of wood shall have the bulkheads forming the sides and ends constructed of commercial 1-inch lumber, of 4-inch tongue and groove sheathing, or of 4-inch

plywood, secured to uprights of at least a 3" x 4" size, spaced not more than 18 inches apart and secured at top, bottom and center with horizontal bracing. When 4-inch plywood is used, the uprights may be spaced on 24-inch centers. Uprights shall not be stepped directly onto a metal deck. A 2" x 4" bearer to carry the uprights shall be laid upon the metal deck. A 2" X 4" header shall be fitted against the underside of an overhead deck to receive the top of uprights. Top of uprights fitted against channel beams may be wedged directly to the beam with 2" by 4" spacers fitted between. Care shall be taken in securing upright framing that no nails penetrate to the interior of the magazine. When a magazine is constructed as a permanent compartment in the vessel, increased size and finish of lumber and other methods of fastening may be used provided such fastenings are recessed below the surface of the boarding to avoid projections within the interior of the magazine. All boardings shall be fitted and finished so 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 of the structure of the vessel. 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 4 inch secured in place with nails or screws. When screws are used for fastening, the screwheads shall be countersunk below the surface of the wood. The floor of the magazine shall conform to the provisions of paragraph (b) of this section. The door of the magazine shall be of substantial construction, fitted reasonably tight into its jamb. The door may be secured in place by the use of extension battens and wedges.

(d) A magazine constructed in accordance with the provisions of paragraphs (b) and (c) of this section, in which it is proposed to stow containers of explosives within 12 inches of the overdeck beams, or hatch coaming, shall have such deck beams and coaming sheathed with wood similar to that required for metal stanchions, posts or

other obstructions by the provisions of paragraph (c) of this section.

(e) When a Class A magazine measures more than 40 feet in any direction, a partition bulkhead shall be fitted within the magazine as near half length as practicable, extending from the deck to at least the top of the stowage. Such partition bulkhead shall be constructed to the same scantlings as the sides of the magazine, except the boardings may be spaced not more than 6 inches apart alternately on both sides of the uprights. This bulkhead shall be constructed before loading commences and care shall be exercised that nail points do not protrude beyond the surface of the boarding. Such partition bulkheads are not required in magazines using the U.S. Navy nonferrous metal dunnage system.

(f) A magazine constructed in accordance with the provisions of paragraphs (b) and (c) of this section shall comply with the provisions of § 146.2975(c).

[CGFR 62-11, 27 FR 5287, June 5, 1962, as amended by CGFR 67-23, 32 FR 8159, June 7, 1967]

§ 146.29-83 Ammunition stowage.

Military explosives that are authorized to be given ammunition stowage by the provisions of § 146.29-100 shall be stowed in a location selected in accordance with the provisions of § 146.29-75. Dunnage shall be laid over metal decks or tank tops, except that dunnage is not required when decks or tank tops are coated with mastic, magnesite, or other equivalent material, and when palletized units are used and the pallets are constructed of wood. Dunnaging shall be fitted to protect packages or articles or military explosives from damage. Nothing within this paragraph shall be construed as requiring the entire interior of the cargo compartment to be covered with dunnage.

§ 146.29-85 Chemical ammunition stowage.

Chemical ammunition or chemical agents in bulk that are authorized to be given chemical ammunition stowage by the provisions of § 146.29-100 shall, unless given another authorized

stowage, be stowed under the following conditions:

(a) Shall be afforded the same protection as required for ammunition stowage.

(b) Stowage shali preferably be in a deep tank or a lower hold.

(c) When stowed in a deep tank, pump suctions shall be effectively sealed off to prevent the escape of any leakage which may take place. Sealing off shall be accomplished by inserting a blank flange in way of the suction side of the bilge pump manifold.

NOTE: The blank flange is to prevent inadvertent leaking of chemical agents into occupied spaces through bilge suction piping. Nothing herein shall preclude the removal of the flange in an emergency situation should (in the opinion of the vessel's master) pumping of the deep tank be necessary.

(d) When stowed in a lower hold or other compartment, the hatch covers, ventilators and pump's suction shall be effectively sealed off to prevent the escape of any leakage which may take place. Sealing off the pump's suction shall be accomplished by inserting a blank flange in way of the suction side of the bilge pump manifold.

(e) When the quantity of chemical ammunition or chemical agents in bulk exceeds the capacity of deep tanks and lower holds, other holds may be used, preference being given to other lower holds or to a tween-deck hold directly over a lower hold in which such substances are stowed.

(f) Chemical ammunition or containers of chemical agents in bulk stowed in a tween-deck shall not be stowed within 8 feet of the side of the vessel.

(g) When the quantity of chemical ammunition to be stowed on board the vessel does not justify the use of a deep tank or lower hold, a suitable tween-deck space may be selected and the ammunition stowed in a portable magazine especially constructed to prevent any leakage from the ammunition escaping outside of the magazine. Such portable magazine shall be located at least 8 feet from the ship's side.

(h) Before entering a deep tank, lower hold or other compartment containing chemical ammunition the air inside the compartment must

be

tested by competent personnel to ascertain if leakage has taken place. If leakage has occurred, the operation of removing the ammunition or chemical agent shall be conducted by skilled personnel, preferably representatives of the appropriate Department of Defense technical service.

[CGFR 62-11, 27 FR 5287, June 5, 1962, as amended by CGFR 67-23, 32 FR 8159, June 7, 1967; CGFR 69-72, 34 FR 17494, Oct. 29, 1969]

§ 146.29-87 Special stowage.

Special stowage may be on deck protected from the elements, in a dock house, mast house, mast locker or in a vacant stateroom: Provided, That such a location conforms to the distance separation rule applicable to the item so stowed and adjacent military ammunition: And provided further, That the space is ventilated and does not contain any vessel stores or machinery or equipment used during the navigation of the vessel and can be closed off from traffic while at sea. Dunnage shall be fitted to protect packages from damage by contacting any metal parts of the ship.

§ 146.29-89 Portable magazine stowage.

Military explosives authorized to be given portable magazine stowage by the provisions of § 146.29-100 shall be stowed under the following conditions:

(a) Shall be located in a hold or on deck in accordance with the provisions of § 146.29-99 and § 146.29-100 for the particular class of military explosive stowed therein. "On deck" stowage shall also meet the requirements of § 146.29-57.

(b) Portable magazines shall be constructed of wood, or of metal lined with wood 4-inch minimum thickness, and not more than 100 cubic feet plus 10 percent of explosives (gross) shall be stowed therein.

(c) All inner surfaces of the magazine shall be smooth and free of nails, screws, or other projections.

(d) When constructed of wood the scantlings shall not be less than those required for a type "A" magazine in § 146.29-79, and a strong, close fitting hinged cover or door with an effective means of securing shall be provided.

(e) When constructed of metal, the minimum thickness of the metal shall be not less than 8-inch sheet, or formed material.

(f) Ammunition or containers of ammunition or explosives in bulk when stowed in a portable magazine shall be so stowed and secured that no displacement can occur either upwardly or laterally.

(g) When stowed on deck the magazine shall be protected from the direct rays of the sun and elements. Runners, bearers, skids, or other suitable means shall be provided to elevate it a minimum of 4 inches from the deck. Pad eyes, ring bolts, or other suitable means shall be provided for lashing the magazines and they shall be so lashed, chocked or braced as to prevent movement in any direction.

(h) Portable magazines shall carry the legend "Inflammable-Keep Lights and Fire Away," or "Flammable-Keep Lights and Fire Away." When used in lieu of ammunition stowage, the legend shall indicate the Coast Guard class or classes of military explosives stowed therein.

[CGFR 62-11, 27 FR 5287, June 5, 1962, as amended, CGFR 63-19, 28 FR 5385, May 30, 1963]

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Cargo transporters, complying with Military Specifications MIL-B-11886 and MIL-B-21560, may be used for the transportation of military explosives and hazardous munitions subject to the following conditions:

(a) Type I or Type II transporters may be used.

(b) The load content shall not exceed 7800 pounds, equally distributed.

(c) Prior to filling, each transporter is required to be thoroughly inspected by an authorized representative of the shipping activity. Special attention shall be given to the inspection of the corner posts, floor system, the lower eight inches of the side and end panels, doors, and door latches. A record of this inspection shall be maintained by the shipping installation for a period of one year after the shipment leaves the installation or activity.

(d) Lifting shall be accomplished in a manner which will support the floor system. When slings or wire ropes are used, they shall be placed under the container to support the floor system.

(e) The cargo handling gear must be of a design capable of handling a working load at least 50 percent greater than the actual weight of the unit comprising the draft.

(f) The master, owner, charterer, agent or other person in charge of the vessel shall require the shipper or his agent, or the delivering carrier to furnish a copy of the shipper's shipping order, shipping paper, bill of lading, manifest or other memorandum, or a waybill prepared from information furnished in the shipper's shipping order bearing the required certification before accepting cargo transporters containing military explosives or hazardous munitions. This shipping paper shall have entered upon it the proper and definite name and class of the commodity or commodities contained therein according to § 146.29100, the total quality by weight; the label applied, if required; and the identification number of the transporter.

(g) Cargo transporters shall carry the legend "Explosives-Keep Lights and Fire Away”, or if hazardous munitions are being shipped "Hazardous Munitions-Keep Lights and Fire Away" as well as the Coast Guard class or classes of military explosives or hazardous munitions stowed therein, e.g., "Coast Guard Class II-H." Letters shall be at least three inches high in contrasting color with the background.

(h) The master or other person in charge of the vessel shall assign an officer of the vessel to supervise the acceptance and stowage of the transporters containing military explosives or hazardous munitions. This officer shall examine the transporters for signs of leaking, damage to the containers, or sifting of contents. Any transporter found to be damaged, leaking or sifting shall not be accepted for transportation.

(i) Cargo transporters containing any military explosives or hazardous munitions may be opened by a duly authorized representative of the Coast Guard for inspection to determine

(b) Military explosives shall not be loaded or unloaded from the same hatch from both sides of the ship simultaneously, unless the hatch is fitted with cargo handling gear located at both the forward and after ends of the hatch. A vessel so equipped may also use both sets of cargo handling gear simultaneously from the same side of the vessel.

(c) When military explosives are stowed in a hold below one in which any cargo is being worked the 'tweendeck hatch dividing the two holds will have all of its covers securely in place.

(d) Military explosives may be loaded in a hold before or after other cargo, provided that all precautions are taken to assure full protection to the explosives against the hazard of articles being dropped from the cargo sling. When possible hatches should be partially covered to assure such protection.

(e) Drafts of any kind shall not be handled over explosives or other dangerous articles that are stowed "On deck".

(f) Any deck loads over which military explosives must be passed shall be limited in height to that of the hatch coaming, bulwark, or three feet, whichever is greater.

(g) Drafts of explosives may not be handled over explosives or other dangerous articles which have been placed on deck permanently or temporarily.

(Sec. 1, 49 Stat. 1889, 46 U.S.C. 391a) [CGFR 62-11, 27 FR 5287, June 5, 1962, as amended by CGFR 69-72, 34 FR 17494, Oct. 29, 1969; CGD 71-12a, 37 FR 14586, July 21, 1972]

§ 146.29-47 Packing and marking.

Military explosives shall not be offered to vessels or accepted by vessels subject to the regulations in this part unless they are in proper condition for transportation and are packed, marked, labeled, described, certified and otherwise acceptable in accordance with the applicable provisions of the regulations in this part.

§ 146.29-49 Stowage on board barges.

(a) Barges subject to the regulations in this part, engaged in the transfer of explosives between receiving points and delivery points within the har

bors, bays, sounds, lakes, and rivers, including the explosives anchorages on the navigable waters, shall conform to the applicable provisions of 49 CFR 176.95 through 176.99. Ammunition or explosives in bulk, in combustible outside packages, stowed "On deck in open" shall after loading and during transportation be covered by fire resistant and/or flame proof tarpaulins securely lashed in place.

(b) Notwithstanding the requirements of this subpart relative to the stowage of detonators, blasting caps and fuzes, Class VIII, such articles may be stowed "On deck" on Class 1A and Class AB barges with other ammunition or explosives in bulk stowed thereon, provided a sandbag barrier of at least 2 feet in thickness intervenes between the ammunition or explosives in bulk and the detonators, blasting caps or fuzes. When both are stowed "On deck" the height of this barrier shall be at least equal to the height of the stowage of the detonators, blasting caps or fuzes, or the ammunition or explosives in bulk, whichever is highest. The barrier shall either completely surround the detonators, blasting caps or fuzes or extend across the width of the barge. With this type of barrier no additional separation is required. For Class AC barges, the stowage of detonators, blasting caps or fuzes, Class VIII, shall, when no permanent steel bulkhead intervenes, be separated from the stowage of ammunition or explosives in bulk by a distance of 40 feet; with a permanent steel bulkhead intervening, detorators, blasting caps or fuzes shall be separated from the stowage of explosives in bulk by a distance of 25 feet and from the stowage of ammunition by a distance of 10 feet. If, under deck, a 2-foot sandbag barrier is utilized to intervene between the stowage of ammunition or explosives in bulk, it shall be considered as though a permanent steel bulkhead or deck intervenes. Notwithstanding the provisions of 49 CFR 176.98, Class CA and Class CB barges may transport ammunition on deck.

[CGFR 62-11, 27 FR 5287, June 5, 1962, as amended by Amdt. 176-1, 41 FR 28122, July 8, 1976]

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