If you're buying a steel fire shutter, here's what to pay attention to. These lessons come from years of making and installing fire doors.
1. Steel Quality
Cold-rolled steel is standard. Slat thickness should be at least 1.2mm for standard doors, 1.5mm or more for heavy-duty applications. But thickness alone doesn't tell the whole story. The steel grade matters too. Q235 is common. Some manufacturers use thinner but higher-grade steel. Others use thick but soft steel that dents easily. Ask for the material cert.
2. Fire Rating
Steel fire shutters come in different ratings: 1.5 hours, 2 hours, 3 hours, and special grade at 4 hours. Higher ratings mean better internal insulation material between the steel faces, better edge seals, and often a more robust guide rail system. Don't just buy by rating number. Understand what rating your building actually requires per the fire safety design.
3. The Door Operator
The motor is what makes the difference between a door that works reliably for ten years and one that gives you trouble every few months. Domestic motors from reputable brands are fine for most applications. For critical installations or heavy doors, German SEW or equivalent imported motors are worth the premium. Check the duty cycle rating. A motor rated for 25 percent duty cycle won't survive in a door that cycles 200 times a day.
4. Installation Quality
A good door installed badly is a bad door. The guide rails must be perfectly vertical. The shaft must be level. The slats must be aligned. If these aren't right, the door will bind, wear unevenly, and fail prematurely. Ask about the installation crew's experience.
5. After-Sales Support
Fire shutters sit unused most of the time. When they're needed, they must work. Annual maintenance is not optional. Make sure your supplier offers a service contract. Test the door monthly yourself. Keep the tracks clean. Don't wait for the annual fire inspection to find out something is wrong.