FRP I Beam Mechanical Properties | Intertek Tested Fiberglass H Beam

Jan / 07 / 2026

FRP I Beam (Fiberglass H Beam) Mechanical Properties – Intertek Tested

FRP I Beam, also known as Fiberglass I Beam or FRP H Beam, is a pultruded structural profile widely used in industrial platforms, chemical plants, offshore structures, and infrastructure projects. Compared with steel I beams, FRP I beams offer excellent corrosion resistance, lightweight design, and long service life.

To verify its mechanical performance, an independent third-party laboratory test was conducted by Intertek Shanghai in accordance with ASTM standards. The following content summarizes the verified test results and explains the structural advantages of FRP I beams.

FRP I Beam Test Information

Item	Details
Product Name	FRP I Beam / Fiberglass H Beam
Section Size	152 × 152 × 9.5 mm
Testing Laboratory	Intertek Shanghai (CMA & CNAS Accredited)
Report Number	201016012SHF-005
Test Standards	ASTM D638, ASTM D695, ASTM D790

All samples were conditioned under controlled temperature and humidity before testing to ensure accurate and repeatable results.

Tensile Properties of FRP I Beam

Tensile performance is a key indicator for load-bearing structural profiles. The FRP I beam was tested according to ASTM D638-14 in the longitudinal direction.

Tensile Property	Result
Tensile Strength	352 MPa
Tensile Modulus	23.5 GPa
Elongation at Break	1.6%

These results demonstrate that pultruded FRP I beams provide high axial strength and stiffness while remaining significantly lighter than steel beams.

Compression Performance

Compression resistance is critical for columns, supports, and vertical structural members. Compression testing was conducted in accordance with ASTM D695-15.

Compression Property	Result
Compressive Strength	134 MPa
Compressive Modulus	23.6 GPa

The stable compressive modulus ensures reliable load transfer and structural safety, especially in corrosive or high-humidity environments.

Flexural Properties (Bending Performance)

Flexural performance determines the beam’s ability to resist bending under service loads. The FRP I beam was tested according to ASTM D790-17 (Procedure A).