TM 55-07/NAVSEA OP 3221 Rev 2
Figure 7-36. Construction details for open-hold guardrail.
7-12. Deck-Stow Securing
Unit loads designated for deck stowage must be protected from direct rays of the sun and exposure to the elements.
When the explosives container is of such construction as to provide adequate protection, an open deck-stow structure is
allowed. Other more sensitive items are required to be stowed in closed structures. Compatability of the explosives
within the deck-stow structure shall conform to the specifications designated by 46CFR146.29-99 and 146.29-100. The
construction site on deck must not be within 20 feet of an incinerator or ash hoist or other heat or spark-generating
source.
a. Construction details for a closed deck-stow structure are illustrated in figure 7-37. The structure is fabricated
mainly of 2-inch lumber and is securely braced to adjacent, permanent ship's structures. Random lengths of at least 1by
6-inch lumber are laid on the metal deck to elevate slightly the entire structure to permit deck water to drain. Runners of
4by 4-inch stock are laid directly on the deck boards and form the foundation of' the structure. Construction proceeds in
a similar manner to that of a portable class "A" magazine. A course of 2by 10-inch minimum flooring is laid and securely
nailed to the 4-by 4-inch runners. The walls of the structure are constructed of 2-by 6-inch minimum lumber and are
secured to 4by 4inch uprights. Suitable waterproof barrier material is used to line the interior of the structure. After the
stow is emplaced and is covered with barrier material, a single course of 2-by 6-inch minimum runners, spaced at
intervals not to exceed 6 inches, is laid on top of the barrier material. The top of the structure, constructed of 2-by 10-
inch minimum lumber, is installed and securely nailed to the side structures and to the 2-by 6-inch runners. Finally, if a
catwalk is required, it is constructed for access to either side of the stowage area. After sufficient 4-by 4-inch blocking is
installed to adjoining coamings or bulwarks, the entire structure is vertically restrained and unitized by means of 1/2-inch
cables
7-43
