from the central axis of the fender. The fittings at either end shall be
connected through the center of the fender by a chain, shall terminate in a
clevis fitting sized for a [44] [_____] mm [1 3/4] [_____] inch shackle and
shall swivel to allow the end fitting to rotate freely on the axis of the
fender. The length of the fender from eye to eye of the end fittings shall
be a minimum of [3.66] [_____] m [144] [_____] inches. Design end fitting
as small as possible to transmit the ultimate load of the shackle to the
fender. End fitting shall be sized so as not to contact loading surfaces
when the fender is compressed to 30 percent of its original diameter (70
percent compression). Fill interior of the fender with energy absorbing
closed-cell foam as specified. The use of chipped or particulate foam is
not acceptable.
2.2
FOAM CORE
The energy absorbing foam core shall be a closed-cell cross-linked
polyethylene foam with the following properties:
a.
Density, ASTM D 1667, [52.86 to 104.12] [_____] to [_____] kg per
cubic meter [3.3 to 6.5] [_____] to [_____] lbs/ft3
b.
Tensile strength, ASTM D 3575 or ASTM D 412, [552] [_____] to
[_____] kPa [80] [_____] to [_____] psi minimum
c.
Elongation (ultimate), ASTM D 3575 or ASTM D 412, [40 percent]
[_____] to [_____] minimum
d.
Water absorption percent volume after 24 hour exposure, ASTM D 1667,
[5.0 percent] [_____] maximum
e.
Continuous service temperature, [-54 to 49 degrees C] [-65 to +120
degrees F] [_____] to [_____]
f.
25 percent compressive set, ASTM D 1667, [8 percent] [_____]
maximum *
g.
50 percent compressive set, ASTM D 3575, [12 percent] [_____]
maximum *
* Contractor option: Compressive Set of foam core material shall be based
on either the 25 percent or the 50 percent requirement listed.
2.3
FENDER SKIN
The outer fender skin shall be minimum [32] [_____] mm [1.25] [_____] inches
thick and constructed of elastomer as specified. Reinforcing is optional
as required by the Contractor's design. If reinforcing is used, [twelve]
[_____] separate filament reinforcing wraps shall be applied as specified
under Filament Wrap. The filament wraps shall be evenly distributed in the
inner 80 percent to 90 percent of the coating thickness. The outer 10
percent to 20 percent of elastomer shall have no filament reinforcing. The
elastomer and filaments shall be applied in a continuous manner to assure
adhesion between the various layers. The connection of the skin to the end
fittings shall be designed and sized to transmit twice the safe tensile
capacity of the chain into the fender skin.
2.3.1
Elastomer
The elastomer used in the fender skin shall be 100 percent PTMEG
SECTION 02396
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