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 TB 740-97-4
APPENDIX T
PRESERVATION AND STORAGE INSTRUCTIONS
FOR
SELF-ELEVATING BARGES AND PIERS
1. General. This appendix provides detailed preservation instructions and storage requirements for self-elevating barges and
piers for long-term storage. These requirements are considered adequate for six sizes of prefabricated steel barges adopted for
military use.
2. Preparation Instructions. a. Barge. The barge will be stored in wet storage elevated on and welded off to the caissons about
12 feet above high water tide, as shown on figure 68. This height will permit underbody (bottom) surveillance and periodic
maintenance. The jacks will be removed from the barge, stored, and preserved as specified. The manhole covers and bottom
compartment plugs will be removed to permit circulation of air throughout the compartments. The opening left by the removal of the
manhole covers will be blanked with -inch exterior grade or marine plywood. The fitted plywood blanks will be provided with an
opening of sufficient size to permit installation of a 6-inch, flanged, gooseneck, galvanized sheet metal ell with standard insect wire
mesh cover. Bituminous coating and strippable compound will be troweled on the top side of the plywood blank to a thickness that is
higher than the coaming to assure water run-off. The removed manhole covers, gaskets, and drain plugs will be packed in wood
boxes conforming to PPP-B-621, style optional, identified, and stowed in the cargo hold. Cleaning and painting of the barge will be in
accordance with TB 43-0144.
b.
Wood Decking (Planking). The wood decking will be treated with wood preservative conforming to MIL-W-18142, type B.
c.
Pneumatic Jacks.
(1) Stored in open storage. The exposed shafts of the retractor cylinders will be coated with type P-11 preservative. Valves,
fittings, and couplings will be closed. The opening in the top of the jack will be blanked with -inch exterior grade or marine plywood.
The plywood blanks will be fitted in such a manner as not to cover or prevent the use of the lifting eyes. The bottom opening in the
jacks will be blanked with a circular close fitting pan constructed of No. 20 gauge galvanized sheet metal. Cushioning material will be
applied to all sharp edges and projections of the jack prior to enclosing the jack in the plastic cocoon-type shroud. The jack will be
covered with a snug-fitting shroud of osnaburg cloth, conforming to CCC-C-429.
NOTE
Do not allow osnaburg cloth to cover jack tie down bar supports. The tie down supports will be left open to permit
installation of tie down bars when jacks are installed and secured to deck pad eyes for sea tow. The shroud will be
fastened to the plywood blank and pan with adhesive, conforming to MMM-A-189. Following the installation of the
osnaburg cloth, it will be sprayed with one coat of sprayable plastic, .025-inch thick, conforming to type I, class 2 of
MIL-C-3254, followed by one coat of bituminous coating, .125 inch thick, conforming to type II of MIL-C-3254, and
one coat of aluminum coating, .002-to .003-inch thick, conforming to type III of MIL-C-3254.
NOTE
Allow a minimum of 24 hours drying time between the application of each coating. Jacks protected in this manner
will be stored ashore on 12-x 12-or 14-x 14-inch timbers, with the bottom and top blanks fitted with flanged-type, 4-
inch vents with wire mesh covers. The vent in the top blank will be of the gooseneck design to prevent direct entry of
water. The vent in the bottom pan will be of a tapered design to permit drainage of accumulated moisture due to
condensation. Vents will be equipped with insect screen covers.
NOTE
THIS IS A VENTED PACK. DESICCANT OR D/H MACHINES ARE NOT REQUIRED FOR THIS PACKAGE.
(2) Stored in covered storage (warehouse, hangers, or closed sheds).
T-1
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