Insulates through the entire cross-section

all composite crossbarThe all composite cross bar from Polygon utilizes an engineered composite structure that results in excellent retention of mechanical and physical properties at elevated temperatures. This all-composite cross bar eliminates the need for traditional metallic cross bars that need secondary insulation that is augmented with an additional layer of insulative paint.

General Specifications

Tensile Strength (Axial) 175 KSI
Compressive Strength (Axial) 175 KSI
Compressive Modulus (Axial) 6.1 MSI
Shear Strength 7.0 KSI
Shear Modulus 0.5 MSI
Modulus of Elasticity (Axial) 6.1 MSI
Poisson’s Ratio 0.28
Young’s Modulus 5.5 x 106 PSI
Yield strength 100,000 PSI
Thermal Conductivity (BTU/hr./sq.ft./°F/in.) 2.0
Specific Heat 0.26 BTU/lb./°F
Dielectric Strength 400 volts/mil
Material Composition Epoxy/Fiberglass
Listed Under UL Number PG-P-560
100°C with 14 lbs. Load–deflection None at 12 days
80°C with 5 lbs. Load–deflection None at 5 days
65°C with 14 lbs. Load–deflection None at 14 days


Any ratings are typical for design purposes. Your design parameters may affect final ratings. Consult with a Polygon sales engineer for guidance. Final testing and approval is the customer's responsibility for their application. This information is derived from our testing and published data. There is no assurance of these properties, or warranty provided that these products are suitable for any particular purpose or operational situation.

Polygon certifies that their product will be free from material defect. Polygon will not accept any liability for loss, damages, or costs from use or misuse of our products.

Specifications are subject to change, and may be affected by our continual process of improvement. Changes may be made without prior announcement.

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