Test Methods for Friction Stays: Cycle Testing, Static Load Tests, Corrosion (Salt Spray), and Torque/Friction Measurement Introduction To ensure safe and long-lasting performance, manufacturers and quality teams test friction stays through multiple verification methods. These tests confirm that window hinges, window friction stay hinges, and friction hinges can withstand real-world loads, repeated opening cycles, environmental exposure, and long-term wear. Because friction stays are part of broader window and door hardware systems, testing must also validate that related components—including corner pieces and joint pieces—perform correctly when assembled.