ISO 6612:2023

Overview - ISO 6612:2023 (Windows and doors - Resistance to wind load - Test method)

ISO 6612:2023 specifies a laboratory test method to determine resistance to wind load for completely assembled windows and pedestrian door sets of any material when exposed to positive and negative pressures. The standard is intended to reproduce in-use conditions (installed per manufacturer instructions and relevant codes) and focuses on the window or door assembly itself - it does not cover joints between frame and building construction nor is it intended to evaluate glass strength.

Key topics and technical requirements

• Test scope and specimens
  • Applies to fully assembled windows and pedestrian door sets; specimens must be operable, clean and conditioned.
  • Ambient conditioning: 10 °C to 30 °C and 25 % to 75 % RH for at least 4 hours before testing.
• Test sequence
  • Deflection test (positive and negative pressures): measure frontal displacement/deflection at centre and ends of frame members after specified pressure steps.
  • Repeated pressure test: 50 cycles of alternating negative and positive pressure to assess performance under pulsating wind loads.
  • Safety test: one cycle at an elevated test pressure to check for detachment, failure or loss of closure.
• Test pressures
  • Three pressure sets are defined (deflection, pulsating/repeated, safety). Default relation: pulsating = 0.5 × deflection pressure; safety = 1.5 × deflection pressure (unless client-specified).
• Instrumentation and accuracy
  • Test chamber able to withstand applied pressures without influencing results.
  • Controlled pressure application and rapid pressure change capability.
  • Airflow measurement: ±5 % accuracy for flows >1 m³/h (±0.05 m³/h for ≤1 m³/h).
  • Displacement transducers/dial gauges: resolution 0.1 mm and accuracy ±5 %; measuring tape ±1 mm.
• Reporting
  • Test report must reference ISO 6612:2023, test institution, date, drawings/photographs, measuring device details, measured deflections, damage and operating defects.

Practical applications and users

• Manufacturers of windows, curtain walling and pedestrian door sets can use ISO 6612:2023 to validate product performance and classify wind resistance.
• Test laboratories and certification bodies use the method for type testing, performance verification and compliance reports.
• Architects, façade engineers and building code authorities rely on these test results to select products suitable for specific wind-load environments (e.g., coastal or high-rise buildings).
• Product developers use deflection, repeated-pressure and safety-test data to improve structural design, sealing and hardware selection.

Related standards

• ISO 6613 - Windows and doors - Air permeability - Test method (airflow pre-test referenced by ISO 6612)
• ISO 22496 - Windows and pedestrian doors - Vocabulary (terms and definitions used)

Keywords: ISO 6612:2023, resistance to wind load, windows and doors test method, wind load test, deflection test, repeated pressure, pedestrian door sets, air permeability (ISO 6613).