A-A-59001A(SH)
3.3 Test requirements. The synthetic batterboard panels shall meet all of the requirements specified herein when
tested in accordance with the standard tests identified in 3.2. The test specimens for 3.2 shall be sized to consist of
the complete panel thickness (e.g., 2-ply, 3-ply, or lightweight construction panels or 2-ply batterboard planks).
3.4 Construction. The synthetic batterboard panel shall consist of a sandwich-type construction, whereby layers of
UHMWPE and energy absorbing elastomer materials are combined together into a single panel, whether it is the
2-ply, 3-ply, or lightweight design. For direct attachment to the bulkhead steel installations, at least 50 percent of
the backside of the UHMWPE layer shall be backed by an elastomer which is 1½ inches (38.1 millimeters) thick for
2-ply, 1 inch (25.4 millimeters) thick for 3-ply, and 0.5 inch (12.7 millimeters) thick for lightweight designs, or as
shown on the applicable ship class installation drawings. The panel shall include approximately a 6- by 6-inch
(152.4- by 152.4-millimeter) square of elastomer material centered at each fastener location and a minimum 3-inch
(76.2-millimeter) to a maximum of 6-inch (152.4-millimeter) wide strips of elastomer material around the complete
panel perimeter. The remainder of the 50 percent elastomer material shall be uniformly distributed over the
remaining panel area using a strip pattern with the strips not less than 3 inches (76.2 millimeters) or more than
6°inches (152.4 millimeters) in width unless otherwise specified on installation drawings. The strips are to be
attached by the manufacturer using corrosion-resistant steel, Grades 304 or 316, fastener hardware so that strips can
be repositioned in field if necessary. Refer to 611-6917107 for further guidance on the construction of the various
batterboard panels.
3.5 Frame mounting. For installations where batterboard panels are mounted to frames, and including plank-type
construction panels, the complete surface of the panel that comes into contact with the frame shall have a layer of
energy absorbing elastomer material as part of its overall thickness. This shall supersede meeting the 50 percent
requirement. In this case, the details on the ship class drawings need to be followed in manufacturing the
batterboard panels.
3.6 Panel size and weight. The synthetic batterboard panels shall be of the required type (see 7.1) with the weights
and dimensions as specified (see 2.1 through 2.3) or planks as specified (see 2.4). Production tolerances on the
actual overall length and width of the synthetic batterboard panel or planks shall be not greater than ±0.125 inch (3.2
millimeters). Production tolerance of the batterboard panel or plank thickness shall not be greater than ±0.125 inch
(3.2 millimeters).
3.7 Installation requirements. When installation is required (see 7.1), the synthetic batterboard panel shall be
installed in accordance with the applicable ship class installation drawing (see 7.2.1) and shall be capable of being
cut, machined, or drilled as needed to meet these installation requirements. Unless otherwise specified in the
ordering information (see 7.1) or drawings (see 7.2.1), standard size panels shall be provided complete with all
mounting holes. Mounting holes shall only be drilled at the time of installation on panels requiring modification at
installation, as specified on the installation drawings (see 7.1).
3.7.1 Spacing. Batterboard panels shall be installed with a maximum 1-inch (25-millimeter) [or as shown on the
installation drawing (see 7.1)] gap between each panel to allow for water drainage and any panel thermal expansion
that may occur when subjected to the temperature range specified in 3.2.
3.7.2 Frames. For installations on LSD 41 and LSD 49 Class ships where batterboard panels are mounted on steel
frame support structures, the portion of the panel that is in contact with the frame support shall have a layer of
energy absorbing elastomer as part of its overall thickness (see 634-6734323 or 634-6734325). This also applies to
batterboard planks which should have elastomer backing in contact areas also mounted to the steel frame support
structures.
3.7.3 Hardware. Fastener hardware used for batterboard panel installation shall be of corrosion-resistant steel
grades. English unit commercial hardware, as specified in 611-6917107, shall be used as a guide for the installation
(see 7.1). 316 SS studs shall not be used due to the reduced yield strength that results in the annealed condition.
3.8 Maintenance. Maintenance of the synthetic batterboard panels shall be limited to a washdown procedure using
a mild cleaning solution followed by a water rinse. Any marine growth or other contaminants shall be capable of
being removed using this procedure. The cleaning solution shall have no adverse effect on the batterboards.
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