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The 200 support angle iron refers to a specific category of structural steel angle profile, typically characterized by at least one leg dimension being approximately 200mm (millimeters). As a fundamental L-shaped steel profile, it serves primarily as a robust structural support element in a multitude of construction, industrial, and fabrication applications. Its significant size implies a capacity for handling substantial loads, making it a key component for creating strong, rigid connections and frameworks.
What Defines a “200 Support Angle Iron”?
The term “200 support angle iron” specifies a few key characteristics:
- Size Indication (“200”): This number most commonly refers to the nominal length of one or both legs of the angle iron in millimeters. For example, it could mean dimensions like 200mm x 100mm, 200mm x 150mm, or 200mm x 200mm. The exact dimensions, including thickness, must be specified for ordering or engineering purposes.
- Function (“Support”): This highlights its primary role – providing structural reinforcement, bracing, carrying loads, or acting as a connection point between other structural members.
- Form (“Angle Iron”): This denotes the L-shaped cross-section, a standard profile in structural steel manufacturing, known for its good strength-to-weight ratio and ease of connection. It’s a versatile structural steel angle.
Key Properties and Specifications
Understanding the specifics is crucial when working with 200 support angle iron:
Dimensions and Tolerances
While “200” points to a major dimension, full specification includes both leg lengths and the material thickness (e.g., 200 x 100 x 10 mm). Thickness significantly impacts strength and weight. Standard lengths vary, but they are often supplied in 6 or 12-meter lengths, which are then cut to size. Dimensional tolerances are governed by standards like ASTM A6/A6M or relevant EN standards.
Material Grades
This type of angle iron is typically produced from common structural steel grades, such as:
- ASTM A36: A widely used carbon structural steel in the US.
- S235JR / S275JR / S355JR (EN 10025): Common European structural steel grades offering different yield strengths (S355 being stronger than S275, which is stronger than S235).
The grade determines the steel’s yield strength, tensile strength, and weldability, impacting its load-bearing capacity.
Finishes and Coatings
- Mill Finish (Black Steel): The standard uncoated finish, susceptible to rust.
- Galvanized Angle Iron: Coated with zinc for excellent corrosion protection, suitable for outdoor or humid environments. A galvanized angle iron finish is common for supports exposed to the elements.
- Painted or Powder-Coated: Provides corrosion protection and desired aesthetics.
Load Bearing Capacity
The capacity of a 200 support angle iron to carry load depends heavily on its exact dimensions (leg lengths, thickness), material grade, the unsupported length (span), how it’s loaded (tension, compression, bending), and how it’s connected or braced. Due to its significant size, it’s generally considered a heavy-duty angle iron capable of supporting substantial loads, but specific calculations by a qualified engineer are necessary for structural applications.
Common Applications for Heavy-Duty Support
The strength and size of 200 support angle iron lend it to numerous uses:
- Construction: Steel lintels over openings, frame components, bracing for walls or roofs, support posts, connection cleats.
- Industrial Equipment: Machine bases and frames, heavy-duty racking systems, conveyor supports.
- Infrastructure: Supports for walkways, platforms, bridges (as components), transmission towers.
- Heavy-Duty Shelving: Creating robust shelving units for warehouses or workshops.
- Custom Fabrication Projects: Any application requiring a strong, rigid metal angle support.
- Fixturing Frameworks: Building large, stable support structures. When used in building frameworks for machinery or precision setups, it’s often combined with specialized fixturing components to ensure accuracy during assembly or welding.
Advantages of Using 200mm Angle Iron
- High Strength: Offers significant load-bearing capacity, especially in grades like S355JR.
- Versatility: Easily welded, bolted, or drilled for various connection types.
- Cost-Effective: A standard structural shape that is generally economical compared to custom-fabricated supports.
- Availability: Common sizes and grades are typically readily available from steel suppliers.
- Structural Rigidity: The L-shape provides good resistance to bending forces along both axes.
Selecting the Right 200 Support Angle Iron
Choosing the correct specification is vital for safety and performance:
- Analyze Load Requirements: Determine the magnitude and type of load the angle iron must support. This dictates the required size, thickness, and material grade. Always consult engineering calculations for structural use.
- Assess Environmental Conditions: Choose an appropriate finish (mill, galvanized, painted) based on exposure to moisture, chemicals, or weather.
- Determine Connection Method: Decide whether connections will be primarily bolted (requiring holes) or welded.
- Specify Clearly: Ensure you order the precise dimensions (e.g., 200 x 150 x 12 mm), grade (e.g., S355JR), finish, and length needed.
- Source Reputably: Obtain materials from suppliers who can provide material test certificates (MTCs) verifying the grade and properties, ensuring structural integrity.
Table 1: Example Common Sizes & Grades (Illustrative) | Example Size (mm) | Common Thickness Range (mm) | Typical Grades | Primary Use Case Example |
| 200 x 100 | 10 – 16 | A36, S275JR, S355JR | Lintels, Frame Members |
| 200 x 150 | 10 – 18 | A36, S275JR, S355JR | Heavy Bracing, Equipment Frames |
| 200 x 200 (Equal Angle) | 16 – 24 | A36, S275JR, S355JR | Columns (built-up), Truss Chords, Heavy Supports |
*Note: Availability varies by region and supplier. Thickness ranges are typical examples. Always verify with supplier stock and engineering requirements.
Handling and Installation Considerations
- Weight: 200 support angle iron is heavy; use appropriate lifting equipment and safety procedures.
- Cutting & Drilling: Requires suitable tools like abrasive saws, band saws, or plasma cutters. Use appropriate drill bits and lubrication for drilling holes.
- Fastening: Ensure correct bolt grades, sizes, and tightening torques are used for bolted connections. Use qualified welding procedures and certified welders for welded connections.
- Safety: Wear appropriate PPE, including gloves, eye protection, and safety footwear.
Conclusion
The 200 support angle iron is a substantial structural component offering significant strength and versatility for demanding applications. Its L-shape, combined with large dimensions and robust steel construction, makes it ideal for creating reliable supports, frames, and connections in construction and industrial settings. Proper selection based on load, environment, and grade, along with correct installation practices, is essential to leverage its full potential as a structural support bracket and dependable framework element.
