BS ISO 19427:2019,Steel wire ropes — Pre-fabricated parallel wire strands for suspension bridge main cable — Specifications.BS ISO 19427:2019 pdf free download.
BS ISO 19427:2019 specifies the production methods, specifications, requirements, test methods, inspection rules, marks, packing, transportation and storage for pre-fabricated parallel wire strand (PPWS), which are made of hot-dip galvanized or zinc-aluminium coated high tensile steel wires described in ISO 19203.
2 Normative references
ISO 148-1, Metallic materials-Charpy pendulum impact test-Part 1: Test method;
ISO 4986, Steel casting- Magnetic particle inspection;
ISO 4992-2, Steel castings-UItrasonic examination-Part 2: Steel castings for highly stressed components;
ISO 6892-1, Metallic materials-Tensile testing-Part 1: Method oftest at room temperature;
ISQ 10474: 2013, Steel and steel products- Inspection documents;
IS0 17558: 2006, Steel wire ropes-Sacketing procedures- Molten metal and resin socketing;
ISO 19203, Steel wire rod and wire products -Hot-dip galvanized and zinc-auminium coated steel wires for bridge cables- Specifications;
EN 1774, Zinc and zinc alloys-Allgys for foundry purposes-Ingot and liquid;
5 Requirements
5.1 Traceability
The traceability shall be done from the beginning to the end of manufacturing. The manufacturer shall use suitable means to ensure the conformity of products and identify the status of products with respect to monitoring and measurement requirements throughout production and delivery.
The manufacturer shall control the unique identification of the products, and shall retain the documented information necessary to enable traceability
5.2 Lengths and fabrication tolerances
5.2.1 The gauge wire shall be in the outside of the PPWS. The total length of the PPWS and all measuring points for the sockets, saddles and the key point such as main span middle point and side span middle point shall be marked on the gauge wire under specific marking load while temperature is uniform. The length of gauge wire shall take into account elongation, sag correction and temperature correction based on unstressed length of the cable.
The tension load shall be varied according to the wire diameter. For 5 mm diameter wires, the load shall be more than 50 kg For 7 mm diameter wires, the load shall be more than 100 kg.