SD240A 3Hr Accordion Curtain for Corner Conditions

— APPLICATION

Openings in smoke barrier walls, openings in fire partition walls, and enclosing monumental stairways with a fabric corner curtain at a 90-degree or obtuse angle — no column required, because the accordion curtain fabric turns the corner. Considered a "smoke barrier" in the IBC, the SD240A® deploys to the floor and utilizes wall trays that are flush with the face of drywall.

— KEY SPECIFICATIONS

Fire rating	3 Hr — UL 10D — UL
Also tested	UL 10B 20 min (no hose stream test requirement) — Intertek · UL 1784 — Intertek · ASTM E84 — Intertek · ASTM E136 — NGC
Max length	146 ft
Max drop height	20 ft
Headbox	18-ga steel · 12"×12" single roller (up to 12 ft length, 10 ft drop) · 9"×9" single roller (up to 12 ft length, 20 ft drop)
Fabric	Glass textile, polyurethane coating · complete assembly listed — headbox, fabric, motor, bottom bar
Wall tray	Factory etch-primed · 12 in wide × 3 in deep · flush with the face of drywall
Corners	Accordion fabric turns the corner — no column required
Maintenance	Removable bottom cover plate at ceiling — access to low voltage motor and fabric
Egress	Two-stage descent (dwell 6'8" AFF, 1 min) · EUB at 36–42 in AFF within 3 ft · no wheelchair egress — see Hose Stream 120® First Responder with Integral Swing Door
Monitoring	Optional class 1 laser obstruction sensor (15-min annunciation) · BMS relay option
Power	120V dedicated 20A life safety circuit · panel draws 7 amps
Battery backup	2 × 12V in UL 864 listed control panel · 14-2 low voltage wiring to 40 ft · 12-2 to 80 ft
Control	Up to 4 motors per panel · 1 motor per roller · up to 9 panels in series
Activation	Volt-free dry contact from addressable fire alarm · smoke/IR detector can wire directly to panel if no central fire alarm