https://www.avient.com/sites/default/files/2023-12/Polystrand Thermoplastic Composite Panel Application _ Install Guide.pdf
Example: Deflection for 24 inch panel = Chart value *[12 / 24]
Performance Comparison
Hammerhead Panels and Marine Plywood
INSTALLATION INSTRUCTIONS
∠Θ°
CUTTING & DRILLING
Recommended blade: Industrial fine cut-off saw blade, 10" x 80 teeth 38° ATB grind with 5/8" bore,
PTFE coating
Recommended router bits: 3/8" diameter, 4 flute TiAlN (titanium aluminum nitride) coated carbide bit
PANEL SHAPING
• Determine bend angle
• Cut relief
• Heat core to softening point
• Bend, hold, and cool
• Glue joint for added strength
FINISHING
Gel coat finish is possible with minimal surface preparation.
TAB TESTING OF VARIOUS INSTALLATION METHODS
Hammerhead™
PETG Laminate
Hammerhead™
PETG Laminate
BOTTOM PANEL LEGLENGTH
BREAK
STRENGTH
PETG Skins with
Plywood Core
1 in/25 mm
1.5 in/38 mm
2 in/51 mm
2400 lbs/1089 kg
2820 lbs/1279 kg
2748 lbs/1246 kg
Hammerhead with
5 lb/ft3 (80 kg/m3)
Core Density
2 in
51 mm
665 lbs
302 kg
Hammerhead with
7 lb/ft3 (115 kg/m3)
Core Density
2 in
51 mm
881 lbs
400 kg
Hammerhead with
8 lb/ft3 (135 kg/m3)
Core Density
2 in
51 mm
1084 lbs
492 kg
Marine Plywood
2 in
51 mm
770 lbs
349 kg
Glass/Epoxy with
Plywood Core
2 in
51 mm
1055 lbs
479 kg
Glass/Polyester
with Balsa Core
2 in
51 mm
919 lbs
417 kg
L-Bracket Installation
Hammerhead™
PETG Laminate
Hammerhead™
PETG Laminate
BOTTOM PANEL LEGLENGTH
BREAK
STRENGTH
PETG Skins with
Plywood Core
2 in
51 mm
2375 lbs
1077 kg
Marine Plywood
2 in
51 mm
770 lbs
349 kg
Glass/Polyester with
Balsa Core
2 in
51 mm
797 lbs
362 kg
U-Channel Installation
ITW Plexus MA420
adhesive was used in all
tab testing installations
except where noted.
FASTENER
TYPE BENEFITS CONSIDERATIONS FOAM
HONEY
COMB
Through-
bolting
Best
mechanical
locking
system
Need back side
access to panel ✓ ✓
Wide Grip
(Bulb-Style)
Rivet
Highest
pullout
strengths
Requires pilot hole ✓
Cup
Washer
Spreads
compressive
load
Requires relief hole;
for substructure
and hard point
attachment
✓ ✓
Wide Grip
(Bulb-Style)
Rivet
Ease of use—
no installation
torque
limitations
For lower
load attachments ✓
Sheet Metal
or
Wood Screw
Readily
available,
low cost
Penetrate both skins
for improved pullout ✓
Shoulder
Washer
Limits
compressive
load
Requires relief hole;
for substructure
and hard point
attachment
✓ ✓
FASTENER SELECTION
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