| Comparison |
Fiberglass Structural Shapes |
Structural Steel (A-36 Carbon) |
| Corrosion Resistance |
Structural Fiberglass is resistant to a broad range of chemicals, with either polyester or vinyl ester resin available. Painting may be helpful when exposed to direct sunlight to prevent color fading. |
Structural Steel is subject to oxidation and corrosion. Requires painting or galvanizing for many applications. |
Weight |
Lightweight - weighs 25% that of steel beams.
1/2" thick plate = 4.7 lbs./sq. ft. |
Often requires lifting equipment to move and put into place.
1/2" thick plate = 20.4 lbs./sq. ft. |
| Conductivity |
Fiberglass Building Components have low electrical conductivity properties - high dielectric capability.
Low thermal conductivity 4. |
Structural steelwork conducts electricity. Potential shock hazard.
Thermal Conductivity 260-460. |
| Strength |
High strength-to-weight ratio and pound-for-pound is stronger than steel in the lengthwise direction.
Tensile strength = 30 KSI, CW = 7 KSI |
Homgenous material.
Tensile strength = 60 KSI.
Yield strength = 36 KSI |
| Stiffness |
Modulus of Elasticity = 2.5 MSI
Will not permanenty deform under working load. |
Flexural modulus = 29 KSI
Modulus of Elasticity = 29 MSI |
| Impact Resistance |
The Glass Mat in Fiberglass Structural Shapes distributes impact load to prevent surface damage. Will not permanently deform under impact. |
Structural steel can permanently deform under impact. |
| EMI/RFI Transparency |
Structural fiberglass is transparent to EMI/RFI transmissions. |
Structural steelwork can interfere with EMI/RFI transmissions. |
| Versatility |
Pigments added to the resin provide color throughout the structural members. Special colors available. |
Steel structural members must be painted for color. To maintain color and corrosion resistance, repainting may be required. |
| Easy Field Fabrication |
Fiberglass structural building components can be field fabricated using simple carpenter tools with carbide or diamond tip blades.
Lightweight for easier erection and installation. |
Steel structural components require welding and cutting torches.
Heavier material requires special handling equipment to erect and install. |
| Cost |
Lower installation and maintenance costs in industrial applications often equals lower lifecycle costs. |
Lower initial cost. |