Black Galvanized Prestressed Steel Strand for High‑Rise Building Projects
Product Spotlights
Steel strand is a steel product formed by helically twisting multiple high-strength steel wires together. Common constructions include 1×3, 1×7, and 1×19, and it is widely used in prestressed concrete structures, suspension bridges, cable-stayed bridges, ground anchors, and geotechnical reinforcement projects. It is often galvanized or epoxy-coated to enhance corrosion resistance. Common foreign grades include ASTM A416 (USA), BS 5896 (UK), EN 10138 (Europe), and JIS G3536 (Japan). For technical parameters and standard requirements, use the search term “steel strand specifications” for detailed information.
Main Applications
In bridge engineering, steel strand is commonly used for main cables of suspension bridges, stay cables, and pretensioned or post-tensioned prestressed beams. In construction, it is used for high-rise building slabs, ground anchors, and uplift piles. In geotechnical engineering, it is used for slope reinforcement, rock bolt systems, and deep excavation support systems. Common European grades include Y1860S7 and Y1770S7 (EN 10138), while the US primarily uses ASTM A416 Grade 270 (low-relaxation steel strand). For bridge cable applications, search “bridge strand cable grade” to find suitable specifications.
Structural Classification and Processing Characteristics
Based on surface condition, steel strand can be classified as plain, galvanized, or epoxy-coated. Based on stress characteristics, it can be classified as normal relaxation or low relaxation, with the latter being more suitable for precision prestressed structures. Key quality indicators include strand lay length, cross-sectional uniformity, and breaking load. To understand the mechanical properties of different constructions, it is advisable to search using “steel strand breaking load chart” for reference data.
International Trade and Selection Suggestions
In international sourcing, key factors to consider include tensile strength, modulus of elasticity, relaxation rate, and corrosion protection method. Grade equivalences exist across different standards — for example, ASTM A416 Grade 270 can correspond to Y1860S7 in EN 10138 or SWPR7 in JIS G3536. For technical comparison and substitution, use the search term “steel strand equivalent grade” for grade conversion. To find globally certified suppliers or export quotes, use “steel strand suppliers USA” for reliable resources.
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