Products Covered:
U.S. Smoke & Fire Corp SD240A Accordion Smoke Curtain tested in accordance with UL 1784.
Product Description:
The U.S. Smoke & Fire Corp SD240A accordion smoke curtain consists of a pleated filament glass fabric curtain that may form corners and irregular shapes without the use of corner posts or columns. Open plan configurations terminate at side guides on each end of the curtain run while closed plan configurations consist of a continuous run of curtain that forms a closed shape without terminations.
Contained in a sheet metal housing, the pleated curtain assembly is operated by a motors and associated electronics. The curtain edges of open plan configurations are captured in vertical side guides during system deployment and the bottom edge of all configurations is attached to a weighted bottom tray.
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.
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).
Minimum (Tested) Size
Drop Height 7'0"
Total Plan Length* 8'6"
*Total Plan Length is the sum of the width of all curtain panels.
Curtain panels are joined in the field with stainless steel thread using a single vertical line of lock stitches centered on a 6-1/4-inch overlap.
