Engineering Specifications

Our composite pilings have been developed using an innovative, three-dimensional fiberglass fabric that has exceptional shear, stiffness, and strength properties as well as outstanding damage tolerance. This highly advanced fabric is produced at our own manufacturing facility to the specific requirements of each piling diameter and thickness to optimize properties and minimize cost.

For a protective outer layer, Pearson Pilings incorporates a natural brown-colored engineering thermoplastic finish known as “PPT”. The “PPT” resists UV radiation and provides a smooth, attractive, and highly durable surface. A modified vinylester resin matrix is used to create long-term hydrolytic stability. Pearson Pilings are strong enough to be driven to the highest level of resistance ensuring a solid, lasting installation.

The following mechanical properties are the results from testing at Brown University’s Mechanical Engineering Lab:

Mechanical Properties	8'' Piling	10'' Piling	12'' Piling	14'' Piling
Axial Tensile Strength	27,000 psi min	29,000 psi min	65,000 psi min	65,000 psi min
Axial Tensile Modulus	2,100,000 psi min	2,700,000 psi min	4,300,000 psi min	4,300,000 psi min
Axial Flexural Strength	25,000 psi min	27,000 psi min	70,000 psi min	70,000 psi min
Axial Flexural Modulus	2,100,000 psi min	2,500,000 psi min	4,000,000 psi min	4,000,000 psi min
Axial Compressive Strength	30,000 psi min	40,000 psi min	55,000 psi min	55,000 psi min
Transverse Tensile Strength	18,000 psi min	21,000 psi min	25,000 psi min	25,000 psi min
Youngs Modulus	2,100,000	2,700,000	4,300,000	4,300,000
Barcol Hardness	>.50 min	>.50 min	>.50 min	>.50 min
Fiberglass to Resin Ratio	50% / 50% by weight	55% / 45% by weight	60% / 40% by weight	60% / 40% by weight
Thermal Expansion	<.000014 in / deg F	<.000012 in / deg F	<.000006 in / deg F	<.000006 in / deg F
Water Absorption	>.25%	<.25%	<.25%	<.25%
Moment of Inertia	33.56	96.17	235.9	379.69
Area - sq/in	4.3	7.96	13.7	16.05
Wall Thickness - inches	.175	.26	.375	.375