IS 3521 Part 8:2021 is the Bureau of Indian Standards mandatory specification for flexible horizontal lifeline systems used as part of personal fall arrest systems - covering design, materials, mechanical performance, testing methods, and marking requirements that manufacturers must satisfy to legally supply these life-safety products in India.
Key requirements include static and dynamic load performance - the complete lifeline system including anchors, line tensioner, energy absorber, and end fittings must withstand defined static proof loads and arrest a dynamic fall test mass without failure or excessive deflection; energy absorption - the system must limit peak arrest force transmitted to the worker to defined maximum limits, preventing internal injury from the arrest shock; corrosion resistance - all metallic components must maintain structural integrity after defined corrosion exposure relevant to outdoor industrial use conditions; component strength - individual components including carabiners, connectors, tensioners, and anchor attachments must meet minimum breaking strength requirements; deflection limits - maximum allowable sag of the lifeline under worker weight and during fall arrest, preventing ground or structure contact below the installation level; and marking requirements - system capacity, number of users, installation instructions, manufacturer identification, IS 3521 Part 8 reference, and ISI Mark on every certified system.
BIS certification under IS 3521 Part 8:2021 is mandatory. Industrial safety procurement, construction project HSE requirements, government infrastructure tenders, and occupational safety regulators under the Factories Act mandate BIS-certified fall arrest systems.
For full details: BIS Certification for Personal Fall Arrest Systems - IS 3521 Part 8:2021