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W-shaped steel is mainly classified into two types based on different application scenarios and structural features: W-shaped steel strips for mine support and wide flange steel (W-shaped) for American standard building structures. The following is the specific analysis:

Definition and structural features

The cross-section is in the shape of the letter "W", formed by cold-bending and rolling thin steel plates (with a thickness of 2.5-3.0mm), and the material is mostly Q235 steel.
The core function is to connect the scattered anchor rods into a whole through the W-shaped structure, forming a support grid structure with coordinated load-bearing.

Core purpose

It is mainly used for support in underground coal mine roadways, cutting holes in working faces, and chambers, especially suitable for reinforcing broken roof slabs or unstable rock strata.
It can be extended to projects such as landslide control and embankment reinforcement.

Technical advantage

High strength and deformation resistance: The cold-rolling hardening process increases the tensile strength by 12% to 15%, and the flexural section modulus is 37 times higher than that of flat steel strips.
High-stiffness support: Stiffness is increased by approximately 70 times, effectively controlling the deformation of surrounding rock.
Economy: High section utilization rate, saving over 30% of steel and reducing support costs.

Limitations

Thin-walled designs are prone to being punctured or torn by anchor bolt support plates under extremely high tunnel pressure.

Definitions and Standards

It complies with the American ASTM standard (such as A36/A572) and is a Wide Flange H-shaped steel. The code "W" stands for "Wide flange".
Model naming rule: W height × weight (for example, W14×90 indicates a height of 14 inches and a weight of 90 pounds per foot).

Core purpose

Large-span load-bearing structures such as beams and columns of high-rise buildings, frames of industrial plants, main beams of Bridges, and supports for heavy equipment.

Performance characteristics

High load-bearing capacity: The yield strength of low alloy steel material (such as A572 Gr.50) is ≥345MPa.
Bending stability: The wide flange design increases the moment of inertia of the cross-section, providing excellent compressive and bending resistance performance.
Construction convenience: Standardized dimensions are compatible with welding/bolt connections, and the surface can be galvanized for anti-corrosion.

Typical specification examples

Model	Height (mm)	Wing Width (mm)	Web thickness (mm)	Single weight (kg/m)
W14×90	356	254	11.2	134
W8×24	203	165	7.2	35.9

Comparison Dimension	W-shaped Steel Belts	American Standard W-shaped Wide Flange Steel
Application fields	mine support, rock layer reinforcement	building structures, Bridges, industrial plants
Material and thickness	Q235 thin plate (2.5-3.0mm)	low alloy thick steel (A572 Gr.50, etc.)
core function	integrated support of dispersed anchor	large-span load-bearing and flexural support
design goals	low cost, high section utilization rate,	high stability and standardized construction

W-shaped steel is classified into two types based on different application scenarios:

Mine W-shaped steel belt: Thin-walled cold-formed parts, used for low-cost rock layer reinforcement, relying on W-section integrated support systems;
American standard W-shaped wide flange steel: Hot-rolled thick-walled structural steel, addressing the compressive and bending resistance requirements of large-span buildings.

Although the names of the two are similar, there are significant differences in materials, processes and functions. The selection should be targeted according to the engineering requirements.

W-shaped Steel

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Details

Definition and structural features

The cross-section is in the shape of the letter "W", formed by cold-bending and rolling thin steel plates (with a thickness of 2.5-3.0mm), and the material is mostly Q235 steel.
The core function is to connect the scattered anchor rods into a whole through the W-shaped structure, forming a support grid structure with coordinated load-bearing.

Core purpose

It is mainly used for support in underground coal mine roadways, cutting holes in working faces, and chambers, especially suitable for reinforcing broken roof slabs or unstable rock strata.
It can be extended to projects such as landslide control and embankment reinforcement.

Technical advantage

High strength and deformation resistance: The cold-rolling hardening process increases the tensile strength by 12% to 15%, and the flexural section modulus is 37 times higher than that of flat steel strips.
High-stiffness support: Stiffness is increased by approximately 70 times, effectively controlling the deformation of surrounding rock.
Economy: High section utilization rate, saving over 30% of steel and reducing support costs.

Limitations

Thin-walled designs are prone to being punctured or torn by anchor bolt support plates under extremely high tunnel pressure.

Definitions and Standards

It complies with the American ASTM standard (such as A36/A572) and is a Wide Flange H-shaped steel. The code "W" stands for "Wide flange".
Model naming rule: W height × weight (for example, W14×90 indicates a height of 14 inches and a weight of 90 pounds per foot).

Core purpose

Large-span load-bearing structures such as beams and columns of high-rise buildings, frames of industrial plants, main beams of Bridges, and supports for heavy equipment.

Performance characteristics

High load-bearing capacity: The yield strength of low alloy steel material (such as A572 Gr.50) is ≥345MPa.
Bending stability: The wide flange design increases the moment of inertia of the cross-section, providing excellent compressive and bending resistance performance.
Construction convenience: Standardized dimensions are compatible with welding/bolt connections, and the surface can be galvanized for anti-corrosion.

Typical specification examples

Model	Height (mm)	Wing Width (mm)	Web thickness (mm)	Single weight (kg/m)
W14×90	356	254	11.2	134
W8×24	203	165	7.2	35.9

Comparison Dimension	W-shaped Steel Belts	American Standard W-shaped Wide Flange Steel
Application fields	mine support, rock layer reinforcement	building structures, Bridges, industrial plants
Material and thickness	Q235 thin plate (2.5-3.0mm)	low alloy thick steel (A572 Gr.50, etc.)
core function	integrated support of dispersed anchor	large-span load-bearing and flexural support
design goals	low cost, high section utilization rate,	high stability and standardized construction

W-shaped steel is classified into two types based on different application scenarios:

Mine W-shaped steel belt: Thin-walled cold-formed parts, used for low-cost rock layer reinforcement, relying on W-section integrated support systems;
American standard W-shaped wide flange steel: Hot-rolled thick-walled structural steel, addressing the compressive and bending resistance requirements of large-span buildings.

Although the names of the two are similar, there are significant differences in materials, processes and functions. The selection should be targeted according to the engineering requirements.

1. W-shaped steel belts for mine support

II. Wide Flange Steel (W-type) for American Standard Building Structure

III. Core Differences between the Two Types of W-shaped Steel

Summary

W-shaped Steel

1. W-shaped steel belts for mine support

II. Wide Flange Steel (W-type) for American Standard Building Structure

III. Core Differences between the Two Types of W-shaped Steel

Summary