Double-Twisted Hexagonal Mesh Gabions and Revet Mattresses (Metallic-Coated Steel Wire or Metallic-Coated Steel Wire ...

A975-11: Standard Specification for Double-Twisted Hexagonal Mesh Gabions and Revet Mattresses (Metallic-Coated Steel Wire or Metallic-Coated Steel Wire With Poly(Vinyl Chloride) (PVC) Coating)

When designing robust and durable erosion control and structural support systems, engineers rely on authoritative standards to ensure material integrity and performance. ASTM A975-11 provides this essential framework for double-twisted hexagonal mesh gabions and revet mattresses, offering a comprehensive guide to materials and manufacturing for these critical civil engineering components.

What is A975-11?

ASTM A975-11 is an industry-leading standard that specifies the requirements for gabions and revet mattresses constructed from double-twisted metallic-coated steel wire mesh. It also covers the metallic-coated or PVC-coated steel wire used for lacing wires, stiffeners, and fasteners, ensuring consistency and reliability in these engineered products. This standard, developed by ASTM International, is crucial for professionals involved in the specification, procurement, and installation of these versatile erosion control structures.

Scope & Purpose

This comprehensive standard governs the materials, manufacturing processes, and quality control for double-twisted hexagonal mesh gabions and revet mattresses. It defines different styles of metallic coatings (zinc, zinc-5% aluminum-mischmetal, and aluminum) and also includes requirements for wire mesh and associated components that are subsequently coated with Poly(Vinyl Chloride) (PVC). The standard explicitly covers the wire mesh, lacing wire, stiffeners, and fasteners integral to the assembly and installation of these structures, focusing on their performance in civil engineering applications such as erosion control and structural reinforcement.

Who Must Comply?

• • Primary audience: Materials Engineers, Civil Engineers, Geotechnical Engineers, Project Managers, Construction Managers, and Quality Control Inspectors.
• • Industries affected: Construction, Civil Engineering, Environmental Management, Infrastructure Development, Coastal Engineering, and Hydraulic Engineering.
• • Compliance nature: Voluntary, but often mandated by project specifications, contractual agreements, and regulatory bodies for critical infrastructure projects.
• • Enforcement: Compliance is typically verified through materials testing, product certification, and site inspections by project engineers, owners, or designated third-party inspectors.

Key Requirements Overview

Professionals must ensure that gabions and revet mattresses conform to the specified styles of metallic or PVC coating. The standard requires that the double-twisted wire mesh, lacing wire, and stiffeners are manufactured from specific types of coated steel wire, detailed in the product styles. Key provisions include adherence to defined mechanical properties for the wire, such as tensile strength, and specifications for the weight and integrity of metallic coatings. For PVC-coated products, requirements for the adhesion and durability of the PVC layer are also critical.

Related Standards & References

ASTM A975-11 integrates seamlessly with several other ASTM standards to provide a complete picture of material quality and testing. Complementary standards include:

• • ASTM A641/A641M: Specification for Zinc-Coated (Galvanized) Carbon Steel Wire, providing foundational requirements for zinc-coated wire.
• • ASTM A856/A856M: Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Carbon Steel Wire, essential for understanding the performance of