As industries advance, fire-safety implementation and management are essential. Under fire regulations, the quarterly routine inspection always checks fire-rated shutter facilities.
The fire-rated roller shutter is a fire and heat barrier for large openings in buildings, usually where a fire wall is awkward: open elevator halls, escalators, wide department-store floors, exhibition hall openings, and similar spots where fire doors and windows don’t fit.
In construction, first understand its structure. It has 13 parts: curtain plate, bottom bar, rails, brackets, drum, housing, control box, motor, limiter, lintel, manual quick-release, button switch, and safety device. From that structure, the body does the fire blocking and the lintel and rails do the smoke blocking. So when buying, watch the material of the body, lintel, and rails. As a long-established maker, RHidoor supplies quality products.
What to watch when buying:
1. Curtain: RHidoor’s steel fire-rated shutter uses 1.0 mm national-standard galvanized steel, filled with aluminum silicate cotton. The premium (inorganic) shutter uses a 4-layer build: 0.32 mm blue decorative cloth, 2.0 mm ceramic fiber cloth, 15 mm fire blanket, and 0.32 mm heat-radiation cloth. These materials hold a fire rating above 4 hours and strongly limit spread.
2. Lintel: RHidoor installs 1.0 mm steel fire-rated shutter slats as the lintel, which are fire- and smoke-rated.
3. Pre-roll: RHidoor designs pre-roll in from the start. The pre-roll length reaches 500 mm, which cuts the pull on the first slat and stops the curtain from coming off.
4. Bottom beam: RHidoor’s bottom beam is 40×70 mm at 1.5 mm, with a counterweight so the curtain drops by its own weight if the thermal fuse fails, bringing the door down faster.
5. Rails: RHidoor uses two rail types, embedded (90 mm deep, 1.5 mm) and exposed (90 mm deep, 3 mm), both with anti-smoke strips that strongly limit smoke spread.