Un iqu e Fir e St op Pr odu ct s Sm oot h En dca p - Sh e e t Rock Syst e m
U.L. Syst e m N o. W - L- 0 0 2 1
( Guide XHEZ
F Rat ing — 1 and 2 Hr
T Rat ing — 0 Hr
Through- Penet rat ion Firest op Syst em s)
1. W a ll Asse m bly — The 1 or 2 hr fire- rat ed gypsum board/ st ud wall
assem bly shall be const ruct ed of t he m at erials and in t he m anner
described in t he individual U300, U400 or V400 Series Wall and Part it ion
Designs in t he UL Fire Resist ance Direct ory and shall include t he
following const ruct ion feat ures:
A. St u ds — Wall fram ing shall consist of eit her wood st uds
or st eel channel st uds. Wood st uds t o consist of nom 2 by 4
in. ( 51 by 102 m m ) lum ber spaced m ax 16 in. ( 406 m m )
OC. St eel st uds t o be m in 3- 1/ 2 in. ( 89 m m ) wide and
spaced m ax 24 in. ( 610 m m ) OC.
B. Gypsu m Boa r d* — 5/ 8 in. ( 16 m m ) t hick, 4 ft ( 1.22 m )
wide wit h square or t apered edges. The gypsum board t ype,
t hickness, num ber of layers, fast ener t ype and sheet
orient at ion shall be as specified in t he individual U300, U400
or V400 Series Designs in t he UL Fire Resist ance Direct ory.
Th e h ou r ly F Ra t in g of t h e fir e st op syst e m is e qu a l t o
t h e h ou r ly fir e r a t in g of t he w a ll a sse m bly in w hich it
is in st a lle d.
2. Fir e st op Syst e m — The firest op syst em shall consist of t he
following:
A. Fir e st op D e vice * — Sle e ve - Sm oot h st eel sleeve
device incorporat ing flat washers secured by sliding
com pression couplers. Device shall be inst alled in
accordance wit h t he accom panying inst allat ion inst ruct ions.
Device provided in nom 1, 2 and 4 in. ( 25, 51 and 102 m m )
diam sizes. Max diam of opening in wall for nom 1, 2 and 4
in. ( 25, 51 and 102 m m ) diam device is 1- 1/ 4, 2- 7/ 16 and
4- 1/ 2 in. ( 32, 62 and 114 m m ) , respect ively.
UN I QUE FI RE STOP PROD UCTS I N C — Sm oot h Sleeve
B. Fir e st op D e vice * — En d Ca p – End cap device
incorporat ing an oct agonal cover plat e wit h a set screw
coupling provided wit h an int um escent put t y fill. Device
provided in nom 1, 2 and 4 in. ( 25, 51 and 102 m m ) diam
sizes for use wit h nom 1, 2 and 4 in. ( 25, 51 and 102 m m )
diam Sm oot h Sleeve devices ( I t em 2A) . End cap devices
inst alled on bot h sides of wall in accordance wit h
accom panying inst ruct ions.
UN I QUE FI RE STOP PROD UCTS I N C — Sm oot h Endcap
* Bearing t he UL Classificat ion Mark