Resistance to repeated opening and closing (Endurance)
26.012026
This test is designed to assess the resistance of joinery to repeated opening and closing. These tests can be carried out on casement, tilt-and-turn, and sliding windows. They can be supplemented by an assessment of air permeability before and after the specified number of cycles and/or mechanical characteristics (operating forces, axial torsion resistance, bracing, soft and heavy impact, etc.).
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