Structural designers for utility-scale solar plants and commercial greenhouses constantly weigh the trade-off: steel gives stiffness but adds dead load and galvanizing costs; aluminum reduces weight but lacks long-term fatigue resistance under wind oscillation. Our FRP rectangular tubes resolve this dilemma by delivering a section modulus-to-weight ratio that outperforms standard steel SHS (square hollow sections) by 22–35% in bending applications, while eliminating the localized buckling risk common in thin-wall aluminum extrusions. We engineer these hollow profiles with multi-axial glass reinforcement concentrated at the corners—the highest stress zones—resulting in controlled deflection under asymmetric live loads such as snow drift or panel-cleaning robot weight. Each tube undergoes an internal visual borescope inspection to ensure void-free inner walls, and we provide calculated span-load tables based on actual four-point bending tests rather than theoretical estimates. This allows your civil consultant to specify shallower sections for the same design load, reducing overall structure height and wind-exposed area without compromising safety factors.
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Product Advantages
Unlike traditional materials that succumb to rust, rot, or chemical attack, FRP rectangular tubes are inherently corrosion-resistant. They are impervious to moisture, saltwater, and a wide range of harsh industrial chemicals, making them the ideal choice for marine settings, chemical plants, and water treatment facilities where metal would fail prematurely . This durability ensures a long service life with minimal maintenance.
FRP tubes deliver remarkable strength at a fraction of the weight of steel. They are typically 20-25% the weight of steel and 70% the weight of aluminum . This combination of high strength and light weight simplifies transportation, handling, and installation, often allowing for entire structures to be pre-assembled offsite. The result is reduced labor costs and faster project completion .
Safety is a critical advantage. FRP rectangular tubes are non-conductive and have low thermal and electrical conductivity . This makes them a safe and reliable structural component for electrical and utility applications where metal poses a shock hazard. Additionally, they are transparent to radio waves and other electromagnetic frequencies .
The pultrusion process allows for a high degree of customization. FRP rectangular tubes can be manufactured in virtually any color, with the pigment running throughout the material for a long-lasting finish that resists fading . Special surfacing veils are even available to mimic wood grain, marble, or granite . This aesthetic versatility allows them to be used in decorative architectural applications as well as for structural support .
Because they do not rust, rot, or corrode, FRP rectangular tubes require very little ongoing maintenance. There is no need for painting, sealing, or frequent replacements . This low-maintenance nature, combined with their exceptional lifespan, translates into significant cost savings over the life of a project, offering a return on investment that outperforms traditional materials .
Application Scenarios
Corrosive industrial environments:Main beams and secondary beams used as platforms, corridors, or equipment supports in chemical plants, sewage treatment plants, and electroplating plants, supporting FRP grates or wooden boards. In marine aquaculture and dock facilities, truss structures are constructed as support frameworks to support work platforms or cage systems.
Electromagnetic sensitive areas:Hospital MRI room, scientific research laboratory for the construction of wall keel, ceiling keel and equipment support to ensure no electromagnetic interference. Substation, communication station: for the production of cable support, equipment fence.
Lightweight Structure and Decoration: The support systems behind architectural curtain walls, particularly in humid or corrosive indoor environments. Exhibition displays and mall decorations utilize these systems to construct temporary or permanent display stands and partition frames, which are easy to cut and shape. Playground structures are applied in humid environments such as water parks.
Secondary components of infrastructure: Solar photovoltaic panel brackets are used in areas with strong corrosion, such as tidal flats and coastal areas.
Parameter Specifications
| Product | FRP Rectangular Tube | |
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| Model | Dimension(mm) A×T1×B×T2 | Weight(kg/m) |
| FT-RCT26 | 26×3×46×3 | 0.81 |
| FT-RCT48 | 48×3×31×3 | 0.85 |
| FT-RCT60a | 60×2.7×30×2.7 | 0.87 |
| FT-RCT60b | 60×3×30×3 | 1.07 |
| FT-RCT63 | 63.5×3.5×37×3.5 | 1.27 |
| FT-RCT70 | 70×3.5×30×3.5 | 1.37 |
| FT-RCT75 | 75×3×35×6 | 1.58 |
| FT-RCT86 | 86×3×32×3 | 1.51 |
| FT-RCT905 | 90×4×40×5 | 1.9 |
| FT-RCT907 | 90×4×40×7 | 2.44 |
| FT-RCT120 | 120×3.5×80×3.5 | 2.46 |
| FT-RCT140 | 140×3×60×3 | 2.16 |
| FT-RCT160 | 160×4×60×4 | 3.16 |
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