RHidoor compiled these new specification requirements to help you understand fire-rated roller shutters better.
They split into steel shutter requirements and inorganic-fabric shutter requirements. Details below.
Premium inorganic-fabric fire-rated shutter requirements:
1. Curtain fabric: raw materials must meet health and environmental rules; no banned materials.
2. Curtain face, drum, and fixings: technical requirements apply.
3. The inorganic composite curtain face must not connect directly to the drum; it links via fixings.
4. Rails and embedded steel: rails fitted firmly on site; embedded steel 600–1000 mm apart. For vertical shutters, rail verticality error vs. base ≤1.5 mm/m and ≤20 mm over full length.
5. Lintel and embedded steel: fitted firmly; embedded steel 600–1000 mm apart.
6. Bottom bar: (a) parallel to ground, even contact; (b) stiffness greater than the curtain face, with a firm connection.
7. Drive: sprockets, chain, bearings. Roller chain and sprocket dimensions and tolerances per GB/T 1243; static strength and chosen safety factor above 4. Drive, bearings, and chain surfaces free of rust, with proper lubricant. Vertical shutter drum deflection in normal use below 1/400 of drum length. Side-coiling shutter drum must be perpendicular to base; verticality error below 1.5 mm/m and below 5 mm over full length.