Products Covered:
U.S. Smoke & Fire Corp Model SD240GS Fire Protective Smoke Curtain tested in accordance with UL 1784, and with UL 10D for a 90 minute rating.
Product Description:
The U.S. Smoke & Fire Corp Model SD240GS fire protective smoke curtain consists of a filament glass fabric, which is wound onto a tube containing an internal drive system. The configurations can either be single or multi-roller. Contained in a sheet metal housing, the curtain assembly is comprised of support rollers and associated electronics. The curtain edges are captured in vertical side guides during system deployment and the bottom edge of the curtain is attached to a weighted bottom bar. If the system encounters an alarm, the releasing device activates deploying the curtain. Should main and backup power systems fail, the curtain will deploy in a controlled manner under the influence of gravity (Gravity Fail Safe). If required, wall switches are provided on each side of the curtain, allowing occupants to momentarily raise the curtain to egress.
Maximum Size (single roller)a (see Fire Ratings Table below)
Drop Height 46'0"
Opening Width 25'0"
Maximum Size (multiple roller)a (see Fire Ratings Table below)
Drop Height 46'0"
Opening Width 120'0"
Minimum Size **
Drop Height 6'6"
Opening Width 7'0"
**
(size tested)
Curtain Overlap: Minimum fabric overlap with multiple roller assemblies 24"
Minimum bottom bar weight: 7.4 lb/ft
Minimum side guide anchorage: 3/8" by 6" long self-drilling screws 12" o.c.
Minimum headbox anchorage: #14 by 2-1/2" long self drilling screws 16" o.c.
FIRE RATINGS
| Test Standard |
Test Type |
Ratinga,b |
| UL 10D |
Fire Resistance |
90 Minutes |
|
UL 10B, UL 10C, and NFPA 252
|
Fire Endurance
|
20 minutes without hose stream
|
aCurtains exceeding the tested dimensions of 10 ft x 10 ft must have an oversize label, issued by Intertek, stating the assembly is constructed in accordance with the certified design except for size. Acceptance of the oversize assembly is at the discretion of the Authority Having Jurisdiction.
bThe UL 10B, UL 10C, and NFPA 252 standards apply to 20 Minute Fire Endurance ratings without hose stream only. Acceptance of the UL 10B, UL10C, and NFPA 252 ratings for the fire curtain product noted above is ultimately at the discretion of the Authority Having Jurisdiction.
AIR LEAKAGE RATINGS
| Test Standard |
Test Type |
Ratinga |
| UL 1784 |
Ambient Temperature |
≤3.0 cfm/ft2 at up to 0.10 in. of w.c. |
| UL 1784 |
Elevated Temperature |
≤3.0 cfm/ft2 at up to 0.10 in. of w.c. |
aThis assembly was tested without an artificial bottom seal. The assembly may be installed in areas where pressurization is provided to control smoke movement in accordance with Section 4.3.2 of NFPA 105 (2019) and for hoistway opening protection and lobby doorways as allowed in Chapter 30 of the 2018 IBC.
