Structural steel, while widespread, presents major drawbacks in harsh environments. It is highly susceptible to corrosion (rust), requires regular protective treatments (galvanizing, painting), and costly maintenance throughout its lifespan. Its high density (7.85 g/cm³) increases transportation, handling, and foundation costs. Steel conducts electricity and heat, posing safety hazards in electrical environments.
Aluminum, although lighter than steel, remains electrically and thermally conductive. It is susceptible to galvanic corrosion in contact with other metals, deforms easily under impact, and requires surface treatments. Its high thermal conductivity can lead to condensation problems.
Structural wood is susceptible to moisture, rot, warp, and is attacked by insects and fungi. It requires costly and environmentally unfriendly chemical treatments (fungicides, insecticides). Its durability is limited in humid or chemically exposed environments.
Pultruded profiles made of GRP (Glass Reinforced Plastic), FRP (Glass Fiber Reinforced Polyester), and CFRP (Carbon Fiber Reinforced Polymer) are composite products manufactured using the pultrusion process. This industrial process involves pulling continuous strands of resin-impregnated glass fibers through a heated mold, creating structural profiles with a constant cross-section and exceptional mechanical properties.
Our product range includes: Angles, Squares, Flat Strips, I-Beams, U-Channels, Round Tubes, Wide Flange Beams, Trench Covers, Solid Rods, Fluted Tubes, Ladder Rungs, and Kick Plates/Toe Plates.
Property | Steel / Aluminum / Wood | FRP / GRP / CFRP | Advantage |
Weight | Heavy (7.85 g/cm³ steel) | ~1.8 g/cm³ | 75% lighter |
Corrosion | Rust / oxidation / rotting | Total immunity | FRP |
Electrical conductivity | Conductive | Non-conductive | FRP |
Maintenance | Regular painting / galvanization | Almost none | FRP |
Installation | Welding + heavy equipment | Simple bolting | FRP |
Service life | 15-25 years (corrosive environments) | 50+ years | FRP |
Life cycle cost | High (maintenance) | Reduced | FRP |
UV resistance | Degradation / discoloration | Integrated protection | FRP |
Property | FRP Value | Steel Value | Remark |
Density | 1,750 - 2,100 kg/m³ | 7,850 kg/m³ | 75% lighter |
Tensile strength | 300-600 MPa (glass) up to 1,400 MPa (carbon) | 400-600 MPa | Comparable to superior |
Elastic modulus | 17-50 GPa | 200 GPa | More flexible - deflection control |
Fatigue resistance | ~420,000 cycles | ~23,000 cycles | 20x higher than steel |
Thermal conductivity | Low (insulator) | High | Reduced condensation |
Electrical conductivity | Non-conductive | Conductive | Electrical safety |
Chemical resistance | Excellent (acids, alkalis, solvents) | Poor without protection | Total immunity |
Fire resistance | ASTM E84 Class 1 (optional) | Naturally high | Retardants available |
Service life (corrosive) | 50+ years | 15-25 years | Minimal maintenance |
Contact us today to discuss your project and discover how our PRV/GRP solutions can transform your infrastructure.
At MJS NEGOCE, we understand that choosing composite materials for your projects can raise many questions. To best support you, we have compiled answers to the most frequently asked questions from our clients. This section is designed to provide you with clear and transparent information about our GRP/FRP products, our lead times, warranties, and technical support. Our goal is to eliminate any uncertainty and allow you to make confident decisions, knowing you are working with a reliable and experienced partner.
What are your delivery times? Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts. Separated they live in Bookmarksgrove right at the coast
Yes. All our GRP/PRV composites are certified according to ISO and ASTM standards. Each batch is audited and inspected before shipment. We guarantee complete traceability of raw materials and strict compliance with manufacturing standards.
Unlike steel, wood, or aluminum, our composites offer:
Yes. We don't just sell materials. Our team supports each client with:
Absolutely. Our composites are designed to withstand the most demanding environments:
We work with a wide range of clients:
