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Structural Profiles - Stair Tread Flat Tube (Orthophthalic)
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Greenlogy TEC
FRP pultruded profiles are a new type of composite material made with glass fiber reinforcement as the base material, resin as the adhesive, and glass fiber cloth as the covering reinforcement layer; after thorough impregnation, the material is heated, formed and cured in a metal mold, then hauled off by a pulling machine. With good physical properties, they are widely used in high-strength and long-span applications.
Product type | Size (mm) | Weight (kg/m) | Size (in) | Weight (lbs/in) |
|---|---|---|---|---|
Stair Tread Flat Tube | A*B*T1*T2 | A*B*T1*T2 | ||
| FT51A | 51*25*4*4 | 1.01 | 2" x 1" x 3/16" x 3/16" | 2.23 |
| FT51B | 51*38*4*4 | 1.22 | 2" x 3/2" x 3/16 x 3/16 | 2.69 |
| FT52 | 52*32*5*5 | 1.41 | 2" x 5/4" x 3/16" x 3/16" | 3.11 |
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Construction
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Chemical
Food and beverage
Manufacturing
Metals and mining
Microelectronics
Oil and gas
Pharmaceutical
Power
Pulp and paper
Leisure
Telecommunications
Transportation
Water and wastewater treatment
Features:
Corrosion resistance
Low maintenance
Flame retardant
Low installation cost
Heavy-metal resistant
Long service life
Non-conductive and non-thermal-conductive
High strength-to-weight ratio
Raw material introduction — resin types
Code | Resin type | Flame retardant performance | Recommended applications |
|---|---|---|---|
VEFR-25 | Vinyl ester type | Oxygen index 28 and above | Acid, alkali and other harsh corrosive environments |
IFR-25 | Isophthalic type | Oxygen index 28 and above | VEFR type, economical, excellent performance, with moderate acid, alkali and solvent resistance |
OFR-25 | Orthophthalic type | Oxygen index 28 and above | General acid and alkali environments |
Applications:
Greenlogy TEC pultruded FRP structural profiles are used in a wide range of applications, combining corrosion resistance, high strength, dimensional stability and light weight, along with thermal insulation and electrical insulation properties. Durable Greenlogy TEC profiles provide years of low-maintenance service in applications where steel, aluminum or wood components are traditionally specified. Today, these profiles are commonly used in highly corrosive applications that previously required stainless steel and other costly components.
Greenlogy TEC profiles
Mechanical properties | ASTM | Unit | Value | Unit | Value |
|---|---|---|---|---|---|
Tensile stress, LW | D-638 | psi | 30000 | kgf/m² | 21092086 |
Tensile stress, CW | D-638 | psi | 7000 | kgf/m² | 4921487 |
Tensile modulus, LW | D-638 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Tensile modulus, CW | D-638 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Compressive stress, LW | D-695 | psi | 30000 | kgf/m² | 21092086 |
Compressive stress, CW | D-695 | psi | 15000 | kgf/m² | 10546043 |
Compressive modulus, LW | D-695 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Compressive modulus, CW | D-695 | 10^6psi | 1 | 10^6kgf/m² | 703 |
Flexural stress, LW | D-790 | psi | 30000 | kgf/m² | 21092086 |
Flexural stress, CW | D-790 | psi | 10000 | kgf/m² | 7030695 |
Flexural modulus, LW | D-790 | 10^6psi | 1.8 | 10^6kgf/m² | 1266 |
Flexural modulus, CW | D-790 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Elastic modulus | Full section | 10^6psi | 2.8 | 10^6kgf/m² | 1969 |
Shear modulus | --- | 10^6psi | 0.45 | 10^6kgf/m² | 316 |
Short-beam shear | D-2344 | psi | 4500 | kgf/m² | 3163813 |
Punch shear | D-732 | psi | 10000 | kgf/m² | 7030695 |
Notched Izod impact strength, LW | D-256 | ft.-lbs./in. | 25 | kg/m | 3.46 |
Notched Izod impact strength, CW | D-256 | ft.-lbs./in. | 4 | kg/m | 0.55 |
Excluding round rods and square rods
Physical properties | ASTM | Unit | Value |
|---|---|---|---|
Barcol hardness | D-495 | --- | 45 |
24-hour water absorption | D-570 | Max % | 0.45 |
Density |
D-792 | lbs./in.³ | 0.062-0.07 |
Coefficient of thermal expansion, LW | D-696 | 10^-6in./in./℃ | 8 |
Flame retardant performance | ASTM | Unit | Value |
|---|---|---|---|
Tunnel test* | E-84 | Flame spread | Max 25 |
Flammability* | D-635 | --- | Non-combustible |
Electrical properties | ASTM | Unit | Value |
|---|---|---|---|
Arc resistance, LW | D-495 | 秒（s） | 120 |
Dielectric strength, LW | D-149 | kv./in. | 35 |
Dielectric strength, PF | D-149 | V/mil | 200 |
Dielectric constant, PF | D-150 | @60hz | 5 |
LW = lengthwise, CW = crosswise, PF = perpendicular to laminate surface
*Applies to ISOFR and VEFR only
Application Scenarios
Stair tread flat tube is used for load-bearing and anti-slip support of stair steps, suitable for industrial platforms, chemical, marine and wastewater treatment and other corrosive environments. Its glass fiber reinforced composite structure remains stable under moist, salt spray and chemical medium conditions. For specific applicable environments and installation methods, please contact us for detailed specifications and quotations.
Selection Guide
When selecting, please determine the cross-section dimensions (A*B) and wall thickness (T1*T2) of the flat tube according to the stair tread span, load-bearing requirements and installation method. Different specifications correspond to different moments of inertia and load-bearing capacities; it is recommended to evaluate comprehensively in combination with tread width and support spacing. Please contact us for detailed specifications and quotations; we will assist in selection according to your working conditions.
Product Advantages
This flat tube is pultruded from glass fiber reinforced material and resin, featuring light weight, high strength, corrosion resistance, insulation and maintenance-free properties, and is suitable for replacing traditional metal tread tubes. Its surface can be processed with anti-slip treatment to improve stair safety. Please contact us for detailed specifications and quotations.
Inquiry Guide
If you need to know the specifications, performance parameters, MOQ and delivery time of stair tread flat tube, please provide cross-section dimensions, quantity and operating environment, and our technical team will reply promptly. Please contact us for detailed specifications and quotations.
Operating Environment
- Greenlogy TEC structural profiles are composites made with glass fiber reinforcement and resin as binder, suitable for indoor and outdoor industrial installations; moisture and atmospheric exposure are normal operating conditions.
- The glass fiber cloth covering reinforcement layer and cured resin matrix can resist corrosive media commonly found in chemical, wastewater and coastal plants, so this profile is typically used where steel requires frequent painting or replacement.
- The stair tread flat tube in this series is used as load-bearing step support on walkways and maintenance platforms, suitable for temperature and humidity ranges common in general industrial conditions; for extreme temperatures or specific chemical exposure, please provide your project conditions and contact us.
Custom Cutting
Need panels that fit, or cut to shape? We custom cut FRP grating and profiles to your drawing: panels cut to size or to shape (corner cuts, cutouts), cut edges sealed with resin, and pre-cut and pre-drilled to drawing before shipping. See the custom cutting services.
