70&90 mm Galvanized Steel Post Tension Flat Duct for Prestressed Buildings

70&90 mm Galvanized Steel Post Tension Flat Duct for Prestressed Buildings. Galvanized Steel Material: Made of galvanized steel strip with silver color for durability. Customizable Length: Standard 5.8m per piece with customizable length options available. ISO 9001 Certified: Quality certified with ISO 9001 and IATF 16949 standards. Wide Application Scope: Suitable for bridges, viaducts, dams, mines, and multi-story buildings. High Stiffness & Lightweight: Features high stiffness, lightweight design, and strong adhesive pull-out force. Corrugated Wave Design: Produced via cold pressing to create corrugated waves for flexibility. Sample Availability: Samples available free of charge, express cost on buyer's account. In-House Manufacturing: Ducts produced in-house by own workers at a 20,000 sqm facility.