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Structural Profiles - Stair Tread Flat Tube (Vinyl Ester)
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Greenlogy TEC
FRP pultruded profiles are made with glass fiber reinforcement, resin as the binder and glass fiber cloth as the covering reinforcement layer; after full impregnation, they are heated, formed and cured in a metal mold and pulled out by a pulling machine. This new composite material has good physical properties and is widely used in high-strength and long-span applications.
Product type | Specification and size (mm) | Weight (kg/m) | Specification and 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 |
Application markets
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Construction
Bridges and highways
Chemical
Food and beverage
Manufacturing
Metals and mining
Microelectronics
Oil and gas
Pharmaceutical
Power
Pulp and paper
Leisure and entertainment
Telecommunications
Transportation
Water and wastewater
Features:
Corrosion resistance
Low maintenance cost
Flame retardant
Low installation cost
Safe in heavy-metal environments
Long service life
Non-conductive and non-thermal-conductive
High strength-to-weight ratio
Raw material introduction — resin types
Code | Resin type | Flame retardancy | Recommended applications |
|---|---|---|---|
VEFR-25 | Vinyl ester type | Oxygen index 28 and above | Harsh corrosive environments such as acidic and alkaline conditions |
IFR-25 | Isophthalic type | Oxygen index 28 and above | An economical VEFR resin type with good to moderate resistance to acids, alkalis and solvents |
OFR-25 | Orthophthalic type | Oxygen index 28 and above | General acid and alkali environments |
Applications:
Greenlogy TEC pultruded FRP structural profiles are widely used in various scenarios, combining corrosion resistance, high strength, dimensional stability and light weight, with thermal insulation and non-conductive properties. Durable Greenlogy TEC profiles provide years of low-maintenance service in areas where steel, aluminum or wood components are traditionally specified. Today, these profiles are often 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, longitudinal | D-638 | psi | 30000 | kgf/m² | 21092086 |
Tensile stress, transverse | D-638 | psi | 7000 | kgf/m² | 4921487 |
Tensile modulus, longitudinal | D-638 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Tensile modulus, transverse | D-638 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Compressive stress, longitudinal | D-695 | psi | 30000 | kgf/m² | 21092086 |
Compressive stress, transverse | D-695 | psi | 15000 | kgf/m² | 10546043 |
Compressive modulus, longitudinal | D-695 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Compressive modulus, transverse | D-695 | 10^6psi | 1 | 10^6kgf/m² | 703 |
Flexural stress, longitudinal | D-790 | psi | 30000 | kgf/m² | 21092086 |
Flexural stress, transverse | D-790 | psi | 10000 | kgf/m² | 7030695 |
Flexural modulus, longitudinal | D-790 | 10^6psi | 1.8 | 10^6kgf/m² | 1266 |
Flexural modulus, transverse | D-790 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Modulus of elasticity | 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 retardancy | ASTM | Unit | Value |
|---|---|---|---|
Tunnel test* | E-84 | Flame spread | Max 25 |
Flame resistance* | 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 only to ISOFR and VEFR
Application Scenarios
The stair tread flat tube is used as the load-bearing frame for platform, stair and walkway treads, and is suitable for humid or corrosive environments in chemical, power, water treatment and marine applications. Its vinyl ester resin system makes it more suitable for conditions involving acid and alkali media and salt fog, and it can be combined with grating and pultruded profiles to form a complete structure.
Selection Guide
When selecting, first determine the tread length, span and load requirements, then choose the tube section size and wall thickness accordingly, and evaluate deflection based on the support spacing. Different specifications have different emphases on strength and self-weight. You are welcome to contact us for detailed specifications and a quotation, and our technical staff will help confirm a suitable model.
Product Advantages
This flat tube is pultruded from glass fiber reinforcement and vinyl ester resin, featuring light weight, high strength, corrosion resistance and electrical insulation with no magnetism. It can be cut and drilled on site for convenient installation and maintenance. Compared with traditional metal tread materials, it offers advantages in service life in corrosive environments and does not require frequent anti-corrosion coating.
Inquiry Guidance
For samples, technical documents or bulk supply plans, please provide the specification and model, quantity and operating environment, and we will reply as soon as possible. You are welcome to contact us for detailed specifications and a quotation; customized lengths and processing services are available according to project requirements.
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.
