Are You Familiar with 2-wire and 3-wire Prestressed Steel Strand?

Our 2-wire and 3-wire prestressed steel strand are niche specifications of prestressed steel strand, primarily used in low-load, small-span applications, distinct from the mainstream 7-wire steel strand. They are commonly used small-diameter steel products in prestressed concrete structures, significantly improving the crack resistance, load-bearing capacity, and durability of components by applying tension before or after concrete pouring. With the increasing demands for structural performance and construction efficiency in modern building engineering, the application scope of these small-diameter steel strands continues to expand, becoming an important component in the development of prestressed technology. This article will help you gain a more comprehensive understanding of 2-wire and 3-wire prestressed steel strand from the following aspects.

I. Product Advantages

Compared to the common 7-wire steel strand, our 2-wire and 3-wire prestressed steel strands have the following unique advantages:

- Structural Composition: 2-wire steel strands are composed of two high-strength steel wires twisted together, with a double-circle tangent cross-section; 3-wire steel strands are composed of three steel wires twisted in a spiral, forming a triangular symmetrical structure for more even stress distribution.

- Strength Level: Both use high-grade raw materials, with strengths covering 1720, 1860, 1960 MPa and even higher, meeting the mechanical requirements of various low-load scenarios.

- Construction Advantages: Compact cross-sectional dimensions allow for more flexible bundling methods, especially suitable for space-constrained construction environments, and facilitate multi-point anchoring and complex bundling designs, resulting in higher efficiency in threading and tensioning.

- Performance Requirements: Both require stress relief treatment (the relaxation rate of 3-wire steel strands is typically below 2.5%) and must be used with specialized anchorages.

- Customization Advantages: The twist pitch can be fully customized according to customer requirements, and the packaging size can be flexibly adapted to warehousing and transportation needs to meet personalized project requirements.

II. Core Specifications

Our product specifications cover a full range of niche application needs, specifically including multiple sub-models from 2x2.25mm to 3x6.00mm, supporting full-specification customized production:

- 2-wire steel strand: Standard diameter 6.0-12.0mm, our factory offers an ultra-fine 2.25mm specification, and can customize special diameters beyond the standard to suit micro-prefabricated component scenarios.

- 3-wire steel strand: Diameter range 8.0-15.0mm, its triangular symmetrical structure makes it more flexible than 2-wire steel strand, with superior bending performance, suitable for complex fabric bundle requirements.

III. Main Application Areas

Our products have a wide range of applications, suitable for the production and construction of various small to medium-sized prestressed components such as T-beams, I-beams, precast slabs, piles, concrete poles, and railway sleepers:

- 2-wire steel strands: Primarily used for pre-tensioning construction of small precast components (such as hollow slabs and small box girders), shallow slope support, and temporary tensioning and fixing. Also suitable for the needs of Japanese companies producing small prestressed concrete structures.

- 3-wire steel strands: Suitable for small and medium-sized bridges, municipal pipeline supports, prestressed building slabs, and tunnel auxiliary support. More widely used in the production of standardized precast components such as concrete poles and railway sleepers, which require extremely high low-relaxation performance and structural stability.

IV. Frequently Asked Questions

1. What are primary advantages of your products ? 

- High Tensile Strength, full specifications from 2x2.25 to 3x6.00mm.

- Qualified Quality, precision single wire diameter control.

- Strand Lay Length could be as per customer's requirement.

- Package can be as per clients' requirement.

2. Why should I buy this 1x2 and 1x3 prestressed steel strand ?

- Package dimension can be as per clients' requirement.

- Within the range of standard, mainly the requirement of weight per meter and lay length, we can manufacture as per clients' specific strand lay length, which can make the stand have a longer length per meter.

3. What makes this product different to other factory's 1x3 prestressed steel strand ?

- Single wire diameter is controlled more precisely than other factory.

Our products strictly adhere to both domestic and international standards, such as GB/T 5224-2023 "Steel Strand for Prestressed Concrete", JIS G3536 (Japanese Standard), ASTM A416/A910M (American Standard), and BS 5896 (British Standard), etc. You can select the appropriate standard for production according to project requirements.

If you have needs for product selection, specification customization, etc., please contact us via the phone number or email address published on our website. We will provide you with professional technical consultation and customized solutions. Feel free to contact us anytime.