CT Shaft Wall Stud System CEMCO’s Solution for Fire-Rated Shaft Walls, Stairwells, and Horizontal Ceilings
Effective 01/14/2022
Expanding Your Solutions
2021/2018/2015 IBC and IRC
Code Compliant ICC-ESR 4934
Table of ContentsIntroduction / CT Shaft Wall Stud System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical and Section Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vertical Limiting Heights (1-HR, 2-HR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 6
Shaft Wall Vertical Fire Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Horizontal Spans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Shaft Wall Horizontal Fire Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fire-Rated Shaft Wall Assemblies for CT Studs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Shaft Wall Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Typical Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 – 13
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.2362 3
Introduction | CT Shaft Wall Stud System
IntroductionCT Shaft Wall Stud SystemCEMCO’s new CT Shaft Wall Product is manufactured from hot-dipped galvanized steel in web depths of 2-1/2", 4" and 6" in 20 ga . (33 mil), and 4” and 6” in 18 ga . (43 mil) thicknesses with corresponding J-Tracks . The CT Shaft Wall System is the industry’s most flexible in that many gypsum board and gypsum Shaftliner manufacturers are approved in several UL fire-rated assemblies for both 1 and 2-hour ratings .
ASTM & Code Standards• ICC-ESR 4934
• ASTM A653/653M – Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process .
• ASTM A924/924M – Specification for General Requirements for Sheet Steel, Metallic-Coated by the Hot-Dip Process .
• ASTM A1003/1003M – Specification for Steel Sheet, Carbon, Metallic and Nonmetallic-Coated for Cold-Formed Framing Members .
• ASTM C645 – Standard Specification for Nonstructural Steel Framing Members .
• IBC: 2012, 2015, 2018, 2021
• CBC: 2013, 2016, 2019
• AISI: S100
Technical Support and Resources• Contact CEMCO’s Technical Services Department at 800-775-2362 or
email at technicalservices@cemcosteel .com .
• Visit www .cemcosteel .com for all catalogs, specification sheets, typical details, and acoustical/UL reports .
LEED v4 for Building & Design Construction• MR Prerequisite: Construction and Demolition Waste Management
Planning .
• MR Credit: Construction and Demolition Waste Management .
• MR Credit: Building Product Disclosure and Optimization – Sourcing of Raw Materials, Option 2 .
• MR Credit: Building Product Disclosure and Optimization – Material Ingredients, Option 1 .
• MR Credit: Building Life-Cycle Impact Reduction, Option 4 .
MR Credit 4 .1/4 .2 – Recycled Content• Total Recycled Content: 36 .9%
• Post-Consumer: 19 .8%
• Pre-Consumer: 14 .4%
California’s Proposition 65 WarningCalifornia’s Safe Drinking Water and Toxic Enforcement Act of 1986 – commonly referred to as Proposition 65 (“Prop 65”) (27 Cal . Code Reg . § 25600, et seq .) – has recently changed, requiring manufacturers to pro-vide a warning based on its knowledge about the presence of one or more of the almost 900 listed chemicals which are known to the State of California to cause cancer and birth defects, or other reproductive harm . With a few exceptions, manufacturers operating in the state of California as well as those entities who distribute, import, package, and/or supply products into the State of California are now required provide a “clear and reasonable” warning to consumers that their products may contain one or more of these listed chemicals or compounds . The complete list is available at www.P65Warnings.ca.gov.
In compliance with the new requirements, we are notifying each of our customers that CEMCO products contain Nickel (metallic) and/or other chemicals listed which are known to the State of California to cause cancer and birth defects or other reproductive harm . Safety data sheets from our major suppliers are available from CEMCO on our website at www.cemcosteel.com.
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.23624
Overview | CT Shaft Wall Stud SystemCT Stud Physical and Section Properties
Physical Properties Section Properties
“CT” Stud Designation Web Gauge Mil
Yield Strength
(ksi)
Design Thickness
(in) CoatingWeight
(lb/ft) Area (in2) Ix (in4) Sx (in3)
20CT212 2-1/2 20 33 40 0.0346 G40 0.840 0.247 0.240 0.167
20CT4 4 20 33 40 0.0346 G40 1.016 0.299 0.708 0.307
20CT6 6 20 33 40 0.0346 G40 1.252 0.368 1.858 0.545
18CT4 4 18 43 40 0.0451 G60 1.319 0.388 0.909 0.395
18CT6 6 18 43 40 0.0451 G60 1.625 0.478 2.393 0.703
Notes: 1. Uncoated steel thickness. Thickness is for carbon sheet steel. 2. Ix = Moment of Inertia 3. Sx = Section Modulus
2-1/2", 4" or 6"
Varies
1-3/8"
1-5/8"
1"
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/06/2021APPROVED BY:DATE: 07/06/2021
CT SHAFT STUD PRODUCTION DRAWING
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/06/2021APPROVED BY:DATE: 07/06/2021
CT SHAFT STUD PRODUCTION DRAWING
CT
Shaf
t Wal
l Stu
d Sy
stem
| w
ww
.cem
cost
eel.c
om |
800
.775
.236
25O
verv
iew
| CT
Sha
ft W
all S
tud
Syst
ems
Vert
ical
Lim
iting
Hei
ghts
per
AC8
6-20
19, A
ISI S
916-
15
Mod
el
No.
Stu
d
Dep
thG
auge
(M
Il)
Des
ign
Th
ik.
(in)
Min
. Th
ik.
(in)
Yiel
d
(ksi)
5 PS
F7.
5 PS
F10
PSF
L/12
0
(ft)
L/18
0
(ft)
L/24
0
(ft)
L/36
0
(ft)
L/12
0
(ft)
L/18
0
(ft)
L/24
0
(ft)
L/36
0
(ft)
L/12
0
(ft)
L/18
0
(ft)
L/24
0
(ft)
L/36
0
(ft)
1-H
our S
haft
wal
l Sys
tem
20CT
212
2-1/
2"20
(33)
0.03
460.
0329
4016
' 0"s
14' 1
"s12
' 10"
s11
' 2"s
13' 1
1"s
12' 4
"s11
' 2"s
-12
' 8"s
11' 2
"s10
' 2"s
-
20CT
44"
20 (3
3)0.
0346
0.03
2940
20' 1
0"s
18' 5
"s16
' 10"
s14
' 8"s
18' 2
"s16
' 1"s
14' 8
"s12
' 10"
s16
'-6"f
14' 7
"s13
' 4"s
11' 8
"s
20CT
66"
20 (3
3)0.
0346
0.03
2940
27'-4
"f24
' 6"s
22' 4
"s19
' 5"s
22'-4
"f21
' 5"s
19' 6
"s17
' 0"s
19'-4
"f19
'-4"f
17' 8
"s15
' 5"s
18CT
44"
18 (4
3)0.
0451
0.04
2840
23' 7
"s20
' 10"
s18
' 11"
s16
' 7"s
20' 7
"s18
' 1"s
16' 6
"s14
' 6"s
18' 8
"s16
' 6"s
15' 0
"s-
18CT
66"
18 (4
3)0.
0451
0.04
2840
30' 1
"s26
' 2"s
23' 7
"s20
' 6"s
25' 1
0"f
22' 1
1"s
20' 7
"s17
' 11"
s22
' 4"f
20' 1
0"s
18' 1
0"s
16' 4
"s
2-H
our S
haft
wal
l Sys
tem
20CT
212
2-1/
2"20
(33)
0.03
460.
0329
4016
' 11"
s15
' 1"s
13' 1
1"s
12' 4
"s14
' 10"
s13
' 2"s
12' 2
"s10
' 8"s
13' 5
"s12
' 0"s
11' 1
"s-
20CT
44"
20 (3
3)0.
0346
0.03
2940
21' 8
"s19
' 5"s
17' 1
0"s
15' 8
"s19
' 0"s
16' 1
1"s
15' 6
"s13
' 8"s
17' 2
"s15
' 5"s
14' 1
"s12
' 5"s
20CT
66"
20 (3
3)0.
0346
0.03
2940
27' 7
"s25
' 4"s
23' 1
"s20
' 2"s
24' 2
"s22
' 1"s
20' 2
"s17
' 7"s
21'-5
"f20
' 1"s
18' 4
"s16
' 0"s
18CT
44"
18 (4
3)0.
0451
0.04
2840
24' 8
"s21
' 10"
s20
' 0"s
17' 8
"s21
' 7"s
19' 1
"s17
' 6"s
15' 6
"s19
' 7"s
17' 4
"s15
' 11"
s-
18CT
66"
18 (4
3)0.
0451
0.04
2840
31' 2
"s27
' 5"s
24' 1
1"s
21' 1
1"s
27' 2
"s23
' 11"
s21
' 10"
s19
' 1"s
24' 8
"s21
' 8"s
19' 1
0"s
17' 5
"s
2-H
our S
tairw
ell S
yste
m20
CT4
4"20
(33)
0.03
460.
0329
4021
' 10"
s19
' 4"s
17' 8
"s15
' 8"s
18' 5
"f16
' 11"
s15
' 6"s
13' 8
"s16
'-2"f
15' 4
"s14
' 1"s
12' 6
"s
20CT
66"
20 (3
3)0.
0346
0.03
2940
28'-1
1"f
25' 1
0"s
23' 8
"s20
' 11"
s23
'-7"
22' 6
"s20
' 8"s
18' 2
"s20
'-6"f
20'-6
"18
' 10"
s16
' 7"s
18CT
44"
18 (4
3)0.
0451
0.04
2840
24' 2
"s21
' 6"s
19' 8
"s17
' 4"s
21' 1
"s18
' 8"s
17' 2
"s15
' 2"s
19' 2
"s17
' 0"s
15' 7
"s-
18CT
66"
18 (4
3)0.
0451
0.04
2840
30' 7
"f27
' 5"s
25' 2
"s22
' 2"s
25' 0
"f23
' 11"
s22
' 0"s
19' 5
"s21
' 8"f
21' 8
"f20
' 0"s
17' 7
"s“s”
= st
iffne
ss/d
eflec
tion
gove
rns,
“f” =
flex
ural
stre
ngth
gov
erns
, “e”
= e
nd re
actio
n go
vern
s
Not
es:
1. A
llow
able
hei
ghts
are
bas
ed o
n th
e tra
nsve
rse
load
test
com
plyi
ng w
ith IC
C-ES
AC8
6 an
d AI
SI S
916-
15.
2. S
tuds
spac
ed a
t 24"
O.C
. max
imum
.3.
Sta
ndar
d J-T
rack
is u
sed
as b
oth
top
and
botto
m tr
ack.
4. C
T-Sh
aft S
tud
limiti
ng h
eigh
ts w
ere
test
ed w
ith 5
/8" T
ype-
X gy
psum
boa
rd o
rient
ed v
ertic
ally.
CT
Shaf
t Wal
l Stu
d Sy
stem
| w
ww
.cem
cost
eel.c
om |
800
.775
.236
26O
verv
iew
| CT
Sha
ft W
all S
tud
Syst
emVe
rtic
al L
imiti
ng H
eigh
ts p
er A
C86-
1995
Mod
el
No.
Stu
d
Dep
thG
auge
(M
Il)
Des
ign
Th
ik.
(in)
Min
. Th
ik.
(in)
Yiel
d
(ksi)
5 PS
F7.
5 PS
F10
PSF
L/12
0
(ft)
L/18
0
(ft)
L/24
0
(ft)
L/36
0
(ft)
L/12
0
(ft)
L/18
0
(ft)
L/24
0
(ft)
L/36
0
(ft)
L/12
0
(ft)
L/18
0
(ft)
L/24
0
(ft)
L/36
0
(ft)
1 H
our S
haft
Wal
l Sys
tem
20CT
212
2-1/
2"20
(33)
0.03
460.
0329
4018
' 10"
s16
' 1"s
14' 2
"s11
' 8"s
15' 6
"s13
' 2"s
11' 8
"s9'
8"s
13' 7
"s11
' 7"s
10' 4
"s8'
7"s
20CT
44"
20 (3
3)0.
0346
0.03
2940
26' 2
"f25
' 8"s
22' 2
"s18
' 2"s
21' 5
"f20
' 2"s
17' 7
"s14
' 6"s
18' 6
"f17
' 4"s
15' 1
"s12
' 6"s
20CT
66"
20 (3
3)0.
0346
0.03
2940
30' 1
1"f
30' 1
1"f
27' 5
"s22
' 10"
s25
' 2"f
25' 2
"f22
' 5"s
18' 8
"s21
' 10"
f21
' 10"
f19
' 7"s
16' 4
"s
18CT
44"
18 (4
3)0.
0451
0.04
2840
26' 5
"s22
' 7"s
20' 2
"s17
' 1"s
22' 2
"s19
' 1"s
17' 1
"s14
' 6"s
19' 8
"s17
' 0"s
15' 2
"s13
' 0"s
18CT
66"
18 (4
3)0.
0451
0.04
2840
35' 1
1"f
30' 6
"s26
' 7"s
22' 1
"s29
' 4"f
25' 4
"s22
' 4"s
18' 7
"s25
' 5"f
22' 5
"s19
' 8"s
16' 6
"s
2 H
our S
haft
Wal
l Sys
tem
20CT
212
2-1/
2"20
(33)
0.03
460.
0329
4021
' 6"s
18' 6
"s16
' 5"s
13' 5
"s17
' 4"s
14' 1
1"s
13' 4
"s11
' 0"s
15' 0
"s12
' 11"
s11
' 6"s
9' 7
"s
20CT
44"
20 (3
3)0.
0346
0.03
2940
29' 2
"f28
' 0"s
24' 6
"s20
' 1"s
23' 1
0"f
21' 1
1"s
19' 4
"s16
' 0"s
20' 7
"f18
' 8"s
16' 6
"s13
' 8"s
20CT
66"
20 (3
3)0.
0346
0.03
2940
34' 0
"f34
' 0"f
31' 1
"s26
' 4"s
27' 8
"f27
' 8"f
24' 8
"s20
' 8"s
24' 0
"f24
' 0"s
21' 2
"s17
' 10"
s
18CT
44"
18 (4
3)0.
0451
0.04
2840
30' 1
"s25
' 5"s
22' 7
"s19
' 0"s
24' 8
"s20
' 11"
s18
' 8"s
15' 1
0"s
21' 7
"s18
' 5"s
16' 5
"s14
' 0"s
18CT
66"
18 (4
3)0.
0451
0.04
2840
41' 1
"f35
' 1"s
30' 1
0"s
25' 6
"s33
' 7"f
28' 5
"s25
' 0"s
20' 1
0"s
29' 1
"f24
' 7"s
21' 8
"s18
' 2"s
2 H
our S
tairw
ell S
yste
m20
CT4
4"20
(33)
0.03
460.
0329
4025
' 7"f
25' 7
"f25
' 7"f
21' 5
"s20
' 11"
f20
' 11"
f20
' 4"s
16' 7
"s18
' 1"f
18' 1
"f17
' 1"s
14' 1
"s
20CT
66"
20 (3
3)0.
0346
0.03
2940
32' 5
"f29
' 8"s
26' 2
"s22
' 0"s
26' 6
"f24
' 10"
s22
' 1"s
18' 1
0"s
22' 1
1"f
21' 1
1"s
19' 7
"s16
' 10"
s
18CT
44"
18 (4
3)0.
0451
0.04
2840
26' 8
"s22
' 10"
s20
' 8"s
17' 1
0"s
22' 7
"s19
' 6"s
17' 7
"s15
' 4"s
20' 1
"s17
' 5"s
15' 1
0"s
13' 8
"s
18CT
66"
18 (4
3)0.
0451
0.04
2840
35' 5
"f35
' 5"f
31' 0
"s25
' 2"s
28' 1
1"f
28' 1
1"f
25' 2
"s20
' 10"
s25
' 0"f
25' 0
"f21
' 11"
s18
' 4"s
“s” =
stiff
ness
/defl
ectio
n go
vern
s, “f
” = fl
exur
al st
reng
th g
over
ns , “
e” =
end
reac
tion
gove
rns
Not
es:
1. A
llow
able
hei
ghts
are
bas
ed o
n th
e tra
nsve
rse
load
test
com
plyi
ng w
ith IC
C-ES
AC8
6.2.
Stu
ds sp
aced
at 2
4" O
.C. m
axim
um.
3. S
tand
ard
J-Tra
ck is
use
d as
bot
h to
p an
d bo
ttom
trac
k.4.
CT-
Shaf
t Stu
d lim
iting
hei
ghts
wer
e te
sted
with
5/8
" Typ
e-X
gyps
um b
oard
orie
nted
ver
tical
ly.
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.2362 7
1 Hour Shaft Wall Assembly
2 Hour Shaft Wall Assembly
2 Hour Stairwell Assembly
Overview | CT Shaft Wall Stud SystemShaft Wall Vertical Fire Assemblies
2 HOUR SHAFTWALL ASSEMBLY
2 HOUR STAIRWELL ASSEMBLY
1 HOUR SHAFTWALL ASSEMBLY
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
(1) Layer of 1/2" Type-C or5/8" Type-X Classified gypsum board
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/29/2021APPROVED BY: F. SESMADATE: 07/29/2021
CT SHAFT STUD SHAFT WALL VERTICAL FIRE ASSEMBLIES
2 HOUR SHAFTWALL ASSEMBLY
2 HOUR STAIRWELL ASSEMBLY
1 HOUR SHAFTWALL ASSEMBLY
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
(1) Layer of 1/2" Type-C or5/8" Type-X Classified gypsum board
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/29/2021APPROVED BY: F. SESMADATE: 07/29/2021
CT SHAFT STUD SHAFT WALL VERTICAL FIRE ASSEMBLIES
2 HOUR SHAFTWALL ASSEMBLY
2 HOUR STAIRWELL ASSEMBLY
1 HOUR SHAFTWALL ASSEMBLY
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
(1) Layer of 1/2" Type-C or5/8" Type-X Classified gypsum board
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
1" Gypsum Liner Panel
CEMCO CT Shaft Wall stud
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
FASTENERSAS REQUIRED
CEMCO J-TRACK
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/29/2021APPROVED BY: F. SESMADATE: 07/29/2021
CT SHAFT STUD SHAFT WALL VERTICAL FIRE ASSEMBLIES
CT
Shaf
t Wal
l Stu
d Sy
stem
| w
ww
.cem
cost
eel.c
om |
800
.775
.236
28
Web
Dep
thG
auge
Des
ign
Thic
knes
s (in
)M
il
1 La
yer T
ype “
X”1"
Sha
ft L
iner
2 La
yer T
ype “
X”1"
Sha
ft L
iner
2 La
yers
of T
ype “
C”1"
Sha
ft L
iner
L/12
0L/
240
L/36
0L/
120
L/24
0L/
360
L/12
0L/
240
L/36
0
2-1/
2"20
0.034
633
13'-3
"10
'-6"
9'-2"
12'-0
"9'
-6"
8'-4
"12
'-2"
9'-8
"8'
-5"
4"20
0.034
633
18'-1
1"15
'-0"
13'-1
"17
'-2"
13'-8
"11
'-11"
17'-6
"13
'-10"
12'-1
"
6"20
0.034
633
25'-1
1"20
'-7"
18'-0
"23
'-8"
18'-9
"16
'-4"
24'-0
"19
'-0"
16'-7
"
4"18
0.045
143
20'-5
"16
'-2"
14'-2
"18
'-7"
14'-9
"12
'-11"
18'-1
0"15
'-0"
13'-1
"
6"18
0.045
143
28'-0
"22
'-2"
19'-5
"25
'-6"
20'-3
"17
'-8"
25'-1
1"20
'-7"
18'-0
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otes
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2. D
ead
Load
s inc
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: Ty
pe-X
: 2.2
PSF
Ty
pe-C
: 2.0
PSF
1"
Sha
ft Li
ner:
4.0
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CT-S
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Wei
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CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.2362 9
Overview | CT Shaft Wall Stud SystemShaft Wall Horizontal Fire Assemblies
2 HOUR HORIZONTAL ASSEMBLY
1 HOUR HORIZONTAL ASSEMBLY
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
1" Gypsum Liner PanelCEMCO CT Shaft Wall Stud
(1) Layer of 1/2" Type-C or5/8" Type-X Classified gypsum board
1" Gypsum Liner PanelCEMCO CT Shaft Wall Stud
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/29/2021APPROVED BY: F. SESMADATE: 07/29/2021
CT SHAFT STUD SHAFT WALL HORIZONTAL FIRE ASSEMBLIES
2 HOUR HORIZONTAL ASSEMBLY
1 HOUR HORIZONTAL ASSEMBLY
(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board
1" Gypsum Liner PanelCEMCO CT Shaft Wall Stud
(1) Layer of 1/2" Type-C or5/8" Type-X Classified gypsum board
1" Gypsum Liner PanelCEMCO CT Shaft Wall Stud
WWW.CEMCOSTEEL.COM SCALE: NTS
DRAWN BY: JOSEPH SIGALADATE: 07/29/2021APPROVED BY: F. SESMADATE: 07/29/2021
CT SHAFT STUD SHAFT WALL HORIZONTAL FIRE ASSEMBLIES
2 Hour Horizontal Assembly
1 Hour Horizontal Assembly
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.236210
Overview | CT Shaft Wall Stud SystemFire-Rated Shaft Wall Assemblies for CT Studs
1 Hour 2 Hour 3 Hour 4 Hour
GA WP 6800 GA WP 7040 GA WP 7422 GA WP 7640
GA WP 6801 GA WP 7051 GA WP 7424
GA WP 6802 GA WP 7052
GA WP 6850 GA WP 7054
GA WP 6851 GA WP 7054.4
GA WP 6904 GA WP 7056
GA WP 6905 GA WP 7057
GA WP 7024.3 GA WP 7058
GA WP 7059
GA WP 7060
GA WP 7061
GA WP 7062
GA WP 7064
GA WP 7065.2
GA WP 7065.5
GA WP 7066
GA WP 7067
GA WP 7073
GA WP 7076
GA WP 7077
GA WP 7078
GA WP 7079
GA WP 7080
GA WP 7084
GA WP 7096
GA WP 7097
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.2362 11
Overview | CT Shaft Wall Stud SystemShaft Wall Installation Instructions
Shaft Wall Installation Instructions1 . Layout per construction drawings . Secure J-Track as perimeter framing
on floor and plumb to ceiling, floor and sides . Attach using suitable fasteners not to exceed 24" on-center . Sealant may be required per the specific assembly .
2 . Plan the stud layout at 24" on-center and adjust accordingly at either end to avoid the last CT stud installed is no closer than 8" from the end .
3 . Cut the first 1" Shaftliner panel 3/4" to 1" less than the total height of the framed section . Plumb the flush against the J-Track and secure with 1-5/8” long #6 Type S screws 24" on-center .
4 . Insert a CT Stud (cut 3/4" less than the overall height of the section) into the tracks (top and bottom) and fit tightly over the installed Shaftliner panel . Install top and bottom of the CT stud into both legs of the J-Track .
5 . Install the next 1" Shaftliner board (cut 3/4" to 1" shorter than the overall height of the section) into the T-section of the CT Stud .
6 . Continue to install successive CT studs and Shaftliner panels as de-scribed above until the wall section is closed . The final panel section may be secured using 1-5/8" long #6 Type S screws into the J-Track .
7 . For doors, rough openings, and other large penetrations/openings, install J-Track with a 3" back leg as perimeter framing for elevator doors and block cavity using a 12" wide gypsum board filler strips per the door frame manufacturer’s instructions .
8 . 1" Shaftliner boards may be abutted, spliced, or stacked within the cavity with panels no shorter than 2' in length . Joints of adjacent Shaftliner panels should be alternately stacked or staggered to prevent a continuous joint (horizontal) .
9 . For a one sided finished vertical system: A 1-hour rating is achieved by installing a layer of 1/2" Type-C or 5/8" Type-X Classified gypsum board horizontally using 1" Type-S or S-12 screws spaced at 24" on-center ensuring the horizontal joints are offset from any splice joints in the shaftliner panels by no less than 12" . For a 2-hour system, a face layer of 1/2" Type-C or 5/8" Type-X Classified gypsum board may be installed either horizontally or vertically over the 1-hour system using 1-5/8" Type S or S-12 screws spaced at 8" on-center .
10 . For a two-sided finished vertical system: Each side may be installed either horizontally or vertically with 1" Type S or S-12 screws spaced at 8" on-center . Offset edges and ends on opposite sides by at least 24" on-center .
11 . For a one-sided finished horizontal system: A 1-hour rating is achieved by installing one layer of 1/2" Type-C or 5/8" Type-X Clas-sified gypsum board perpendicular to framing using 1" Type-S or S-12 screws spaced at 24" on-center ensuring long-edged joints are offset from any splice joints in the shaftliner panels by no less than 12" . For a 2-hour system, a face layer of 1/2" Type-C or 5/8" Type-X Classified gypsum board may be installed either perpendicular or parallel to framing over the 1-hour system using 1-5/8" Type-S or S-12 screws spaced at 8" on-center .
12 . If installing for HVAC ducts, consult with the HVAC engineer regarding the level of caulking and sealant required . All joints on the face layers must be taped and finished with joint compound meeting ASTM C 475 . All penetration openings must be filled with approved fire-stopping sealants .
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.236212
Overview | CT Shaft Wall Stud SystemTypical Details
ELEVATOR DOOR ROUGH OPENING
STEEL J-RUNNER
A
ACT STUD
STEEL J-RUNNER
JAMB STRUT
20 GA. JAMBSTRUT
CT STUD
SCREWATTACHEDBOTH SIDES
STEELJ-RUNNER
SCREWATTACHEDBOTH SIDES
STEELJ-RUNNER
STEEL J-RUNNERHEADER
1" LINER BOARD5'-0" MAX.OPENING
STEELJ-RUNNER
HORIZONTAL ATTACHMENTCT STUD TO J-RUNNER
HEADER DETAIL
STEELJ-RUNNER
JAMB DETAIL
SHAFTWALL SYSTEM DESIGN DETAILS
1
2
3
1 2
3
CT STUD @24"O.C.
SOLID GYPSUMFILLER STRIPS AS REQUIREDFOR DOOR FRAMES
JAMB TRIM GROUTED INPLACE AND/OR ATTACHEDTO JAMB WITH JAMBANCHOR CLIP
B B
JAMB DETAILSECTION B-B5
HEADER DETAILSECTION C-C6
C
C
SECTION A-A4
1" LINERBOARD
SCREW ATTACHAT BOTTOM LEGOF CT STUD
GYPSUMBOARD
FASTEN BOTHSIDES OF CT STUDTO J RUNNER10'-0"
MAX
10'-0"MAX
STEEL J-RUNNER
20 GA. JAMBSTRUT
20 GA. JAMBSTRUT
SCREWATTACHEDBOTH SIDES
20 GA. JAMBTRACK
20 GA. JAMBTRACK
20 GA. JAMBTRACK
SOLID GYPSUM FILLERSTRIPS AS REQUIREDFOR DOOR FRAMES
CT STUD
CT Shaft Wall Stud System | www.cemcosteel.com | 800.775.2362 13
Overview | CT Shaft Wall Stud SystemTypical Details
SHAFTWALL SYSTEM DESIGN DETAILS
CORNERREINFORCEMENT
GYPSUMPANELS
STEELJ-RUNNER
OUTSIDE CORNER7
CORNERREINFORCEMENT
STEEL J-RUNNER
STEEL J-RUNNER
INSIDE CORNER8
WALL JUNCTION10
WALL INTERSECTION11
GYPSUM LINER PANEL
GYPSUM LINER PANEL
ACOUSTICAL SEALANT
SEALANT
FASTENERS AS REQUIRED24" O.C.
STEEL J-RUNNER
INSIDE CORNER9 HEAD SECTION (UL TBD)12
CORNERREINFORCEMENT2 LAYERS OF GYPSUMPANELS
1/2" TYPE "S" PAN HEADSCREW @ 12"O.C.(ATTACH BOTH SIDES OFCT-STUD & J-RUNNER ATTOP & BOTTOM OF STUD)
STEEL J-RUNNER
3/8" TO1/2"
1" M
IN.
5/8"MAX.
STEEL J-RUNNER
ACOUSTICAL SEALANT
CT STUD
STEEL J-RUNNER
1'' GYPSUM PANEL
PANEL GYPSUM LINER
GYPSUMPANELS PANEL GYPSUM
LINER
PANEL GYPSUMLINER
CT STUD
CT STUD
1' GYPSUM LINERPANEL
GYPSUM PANELS
GYPSUM PANELS
1' GYPSUM LINERPANEL
GYPSUM PANELS
CT STUD1' GYPSUM LINERPANEL
1' GYPSUM LINERPANEL
Corporate Headquarters13191 Crossroads Parkway North, Suite 325, City of Industry, CA 91746 P: 800 .775 .2362 | F: 626 .330 .7598
Southern California Manufacturing Facility263 North Covina Lane, City of Industry, CA 91746 P: 800 .775 .2362 | F: 626 .330 .7598
Northern California Manufacturing Facility1001-A Pittsburg Antioch Hwy, Pittsburg, CA 94565 P: 925 .473 .9340 | F: 925 .473 .9341
Denver Colorado Manufacturing Facility490 Osage Street, Denver, CO 80204 P: 303 .572 .3626 | F: 303 .572 .3627
Fort Worth Texas Manufacturing Facility8600 Will Rogers Blvd, Fort Worth, TX 76140 P: 817 .568 .1525 | F: 817 .568 .2759
www .cemcosteel .com
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