Hot Rolled Structural H Beam Steel

What are the characteristics of Hot Rolled Structural H Beam Steel?

I. Structural and Mechanical Characteristics

1. Efficient Sectional Mechanics: Featuring uniform flange thickness and parallel inner and outer surfaces, the section modulus is evenly distributed. They offer superior bending, shear, and torsional resistance compared to standard I-beams, resulting in high load-bearing efficiency.

2. Stable Overall Performance: Formed through integrated high-temperature hot rolling without welded joints, they exhibit low residual stress and are resistant to deformation and cracking, ensuring high structural safety.

3. High Rigidity and Stability: Strong overall rigidity effectively resists vertical loads, horizontal wind pressure, and seismic forces, making them ideal for long-span, high-load-bearing beams and columns.

II. Economic and Material Characteristics

1. Lightweight and Material-Efficient: They require less material than traditional structural steel sections for the same load-bearing capacity, effectively reducing the building's dead weight and foundation costs.

2. Standardized Specifications: Comprehensive specifications across the HW, HM, and HN series, combined with ample stock, facilitate easy selection and procurement.

III. Construction and Usage Characteristics

1. High Installation Efficiency: Regular geometry and high joint precision allow for various connection methods (such as bolting and welding), resulting in shorter on-site construction times.

2. Broad Adaptability: Suitable for direct use in beams, columns, platforms, and supports. When paired with anti-corrosion coatings or hot-dip galvanizing, they are suitable for indoor and outdoor use, as well as in standard or corrosive environments.

3. Ease of Processing: Easily cut, drilled, and welded with stiffeners and connection plates to meet diverse structural connection requirements.

Uses and Application Scope

I. Primary Uses

1. Load-Bearing Columns: Primarily utilizing the Wide Flange (HW) type, these serve as the main vertical load-bearing components, transferring vertical loads and ensuring overall structural stability.

2. Frame Beams and Columns: Medium-flange (HM) sections are suited for steel frame systems, handling both vertical loads and lateral forces.

3. Primary and Secondary Beams: Narrow-flange (HN) sections are the most widely used; they support floor and roof loads and are ideal for long-span floor and roofing systems.

4. Bracing/Support Components: Used for fabricating equipment supports, pipe rack supports, maintenance platforms, roof purlin bases, etc.

5. Composite Structures: Combined with concrete to form steel-concrete composite beams and columns for use in multi-story and high-rise buildings.

II. Scope of Application

1. Industrial Buildings

Various steel-structured factories, warehouses, workshops, and crane beam systems; hot-rolled structural H-beams are the core material for industrial steel structures.

2. Public and Civil Buildings

Large-space, long-span structures such as stadiums, exhibition centers, transport hubs (stations/airports), shopping malls, office buildings, and multi-story residential complexes.

3. Municipal and Infrastructure

Urban utility tunnels, bridge piers, pedestrian overpasses, municipal hoarding supports, and frameworks for large outdoor billboards.

4. New Energy and Supporting Projects

Photovoltaic (PV) mounting structures, wind turbine bases, energy storage facilities, and steel frameworks for new energy infrastructure.

5. Other Fields

Large equipment bases, industrial platforms, ship deck supports, logistics and warehouse racking systems, and prefabricated steel buildings.

Key Performance Parameters of Hot Rolled Structural H Beam Steel

Executive Standards: GB/T 11263-2017, GB/T 700, GB/T 1591

I. Common Materials and Mechanical Properties

II. Section Classification and Designation Rules

1. Classification

· HW (Wide-flange H-beam): Flange width ≈ section height; primarily used for columns.

· HM (Medium-flange H-beam): Medium flange width; primarily used for frame beams and columns.

· HN (Narrow-flange H-beam): High section depth and narrow flanges; primarily used for primary and secondary beams (highest usage volume).

2. Designation Format: Height H × Flange Width B × Web Thickness t1 × Flange Thickness t2. Example: HN400×200×8×13.

III. Dimensional and Shape Tolerances

1. Sectional Dimensional Deviation: Strictly adheres to national standard limits to ensure precision during splicing and installation.

2. Straightness (Camber/Sweep): ≤2mm per meter; total deviation not exceeding 0.2% of the total length.

3. Twist: No significant torsional deformation along the full length; meets steel structure installation requirements.

4. Fixed Length: Standard specifications. 6m/9m/12m; custom cutting based on drawings is also available.

IV. Surface and Processing Properties

1. Delivery condition: Hot-rolled "black" finish (with mill scale).

2. Surface treatment: Suitable for subsequent rust removal, painting, fire-resistant coating, and hot-dip galvanizing; adaptable to both indoor and outdoor environments.

3. Processability: Can be cut, drilled, welded, and bent; suitable for fabricating various structural connections.

V. Operating Environment Parameters

1. Standard operating temperature: [Range] °C.

2. Low-temperature conditions: Must pass low-temperature impact testing for use in extremely cold regions.

3. Corrosion resistance: The base material lacks inherent corrosion resistance; surface protection is mandatory in corrosive environments.

VI. Structural Load-Bearing Characteristics

1. Uniform flange thickness and parallel inner/outer surfaces; high section modulus with excellent resistance to bending, lateral displacement, and torsion.

2. Integrally hot-rolled (no welded joints); low residual stress; resistant to deformation or cracking under long-term loading.

3. Superior lateral stiffness compared to standard I-beams; ideal for long-span structures and buildings subject to high wind loads.

Specifications Table