RHidoor’s fire shutters split by curtain build into ordinary steel and composite steel. The former is single steel plate, the latter double plate with insulation between. When used to replace a firewall with a rating over 3.0h, you can drop the water curtain. Fire shutters: only garage lanes may use ordinary steel; all else needs premium fire shutters.
How to pick a steel fire shutter:
1. Check the looks:
A qualified steel fire shutter welds firmly with even spots; the surface spray is flat and smooth; at the set spot it has the product mark, quality pass mark, and certification mark. A bad one welds poorly, spots uneven, spray rough, and lacks the marks.
A qualified shutter looks complete, no damage, clean surface, no plane marks, burrs, or hammer marks; corners and seams tight and flat; marks at the set spot. A bad one is incomplete, damaged, not clean, with plane marks, burrs, hammer marks; seams not tight; no marks.
2. Check the size: a qualified product’s outer size should be <= the sample’s, leaf thickness >= the sample’s, frame side width >= the sample’s, fire glass size <= the sample’s, fire glass thickness >= the sample’s. A bad one exceeds the sample size, leaf thinner, glass smaller.
3. Check the seal: a qualified steel or inorganic fire shutter has a fire seal strip, straight, not arched, with a report from a national lab. A bad one has no strip, or an arched one, and no report.
How many materials:
Steel fire shutter: steel curtain plate, rail, seat plate, lintel, box, with motor and control box, meeting integrity.
Inorganic fiber composite fire shutter: inorganic fiber curtain, steel splint, rail, seat plate, lintel, box, with motor and control box, meeting integrity.
Premium fire shutter: steel or inorganic fiber curtain, steel rail, seat plate, splint, lintel, box, with motor and control box, meeting integrity, insulation, and smoke control. Rolls left or right.
Fire rating classes:
1. Steel fire shutter (F1, 1.50h)
2. Inorganic fiber composite (F2, 2.0h)
3. Premium fire shutter (F3, 3.00h)
Notes on steel fire shutter use:
Steel fire shutters are fine steel goods with good metal traits, hard to damage, and strong fire traits, a key safety guard. When rolled up they take no space. But every material has weak points. Steel corrodes with acid or alkali, so never use it in such an environment; avoid acid/alkali effects. Also avoid metal damage; thin steel can dent or be hit beyond recovery. Makers usually warn of this.
RHidoor detailed the steel fire shutter material, care, and acceptance so you can tell and choose better when buying. If still unclear, call +86 18938501256 (ruihua@rhidoor.com).