ct shaft wall stud system catalog 100721 - cemcosteel.com

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


DRAWN BY: JOSEPH SIGALADATE: 07/06/2021APPROVED BY:DATE: 07/06/2021

CT SHAFT STUD PRODUCTION DRAWING

CT

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t Wal

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Sha

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all S

tud

Syst

ems

Vert

ical

Lim

iting

Hei

ghts

per

AC8

6-20

19, A

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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)

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our S

haft

wal

l Sys

tem

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212

2-1/

2"20

(33)

0.03

460.

0329

4016

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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

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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

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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

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20' 1

0"s

18' 1

0"s

16' 4

"s

2-H

our S

haft

wal

l Sys

tem

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212

2-1/

2"20

(33)

0.03

460.

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4016

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s15

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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

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20' 2

"s17

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21'-5

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18' 4

"s16

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18CT

44"

18 (4

3)0.

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0.04

2840

24' 8

"s21

' 10"

s20

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17' 8

"s21

' 7"s

19' 1

"s17

' 6"s

15' 6

"s19

' 7"s

17' 4

"s15

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s-

18CT

66"

18 (4

3)0.

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0.04

2840

31' 2

"s27

' 5"s

24' 1

1"s

21' 1

1"s

27' 2

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12' 6

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20CT

66"

20 (3

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2940

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25' 1

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23' 8

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"s20

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s16

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18CT

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18 (4

3)0.

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2840

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"s21

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19' 8

"s17

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21' 1

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17' 2

"s15

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19' 2

"s17

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15' 7

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18 (4

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0.04

2840

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s22

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19' 5

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ype-

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psum

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ertic

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CT

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t Wal

l Stu

d Sy

stem

| w

ww

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all S

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Syst

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ng H

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er A

C86-

1995

Mod

el

No.

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d

Dep

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auge

(M

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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)

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0

(ft)

L/18

0

(ft)

L/24

0

(ft)

L/36

0

(ft)

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haft

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14' 2

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15' 6

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11' 8

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13' 7

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10' 4

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20CT

44"

20 (3

3)0.

0346

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2940

26' 2

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22' 2

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21' 5

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17' 7

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' 6"s

18' 6

"f17

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15' 1

"s12

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20CT

66"

20 (3

3)0.

0346

0.03

2940

30' 1

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30' 1

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27' 5

"s22

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18' 8

"s21

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16' 4

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18CT

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18 (4

3)0.

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0.04

2840

26' 5

"s22

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20' 2

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17' 1

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19' 8

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15' 2

"s13

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18CT

66"

18 (4

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0.04

2840

35' 1

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30' 6

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9' 7

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20 (3

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0.03

2940

29' 2

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24' 6

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23' 1

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21' 1

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19' 4

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20' 7

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16' 6

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20CT

66"

20 (3

3)0.

0346

0.03

2940

34' 0

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31' 1

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27' 8

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24' 8

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24' 0

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21' 2

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18CT

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18 (4

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2840

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22' 7

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15' 1

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21' 7

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16' 5

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18CT

66"

18 (4

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2840

41' 1

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30' 1

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18 (4

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2840

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20' 1

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15' 1

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13' 8

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18 (4

3)0.

0451

0.04

2840

35' 5

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31' 0

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28' 1

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28' 1

1"f

25' 2

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' 10"

s25

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25' 0

"f21

' 11"

s18

' 4"s

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ness

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n go

vern

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reng

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end

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load

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oard

orie

nted

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tical

ly.


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" Gypsum Liner Panel

CEMCO CT Shaft Wall stud

(1) Layer of 1/2" Type-C or5/8" Type-X Classified gypsum board

FASTENERSAS REQUIRED



CEMCO J-TRACK






CEMCO J-TRACK






CEMCO J-TRACK

(2) Layers of 1/2" Type-C or5/8" Type-X Classified gypsum board



DRAWN BY: JOSEPH SIGALADATE: 07/29/2021APPROVED BY: F. SESMADATE: 07/29/2021

CT SHAFT STUD SHAFT WALL VERTICAL FIRE ASSEMBLIES










CEMCO J-TRACK






CEMCO J-TRACK






CEMCO J-TRACK















CEMCO J-TRACK






CEMCO J-TRACK






CEMCO J-TRACK






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

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25'-1

1"20

'-7"

18'-0

"23

'-8"

18'-9

"16

'-4"

24'-0

"19

'-0"

16'-7

"

4"18

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143

20'-5

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'-2"

14'-2

"18

'-7"

14'-9

"12

'-11"

18'-1

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13'-1

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6"18

0.045

143

28'-0

"22

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19'-5

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20'-3

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25'-1

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Overview | CT Shaft Wall Stud SystemShaft Wall Horizontal Fire Assemblies

2 HOUR HORIZONTAL ASSEMBLY



1" Gypsum Liner PanelCEMCO CT Shaft Wall Stud





CT SHAFT STUD SHAFT WALL HORIZONTAL FIRE ASSEMBLIES









CT SHAFT STUD SHAFT WALL HORIZONTAL FIRE ASSEMBLIES

2 Hour Horizontal Assembly

1 Hour Horizontal Assembly


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


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 .


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


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


20 GA. JAMBTRACK

20 GA. JAMBTRACK

20 GA. JAMBTRACK

SOLID GYPSUM FILLERSTRIPS AS REQUIREDFOR DOOR FRAMES

CT STUD


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


GYPSUM PANELS

CT STUD1' GYPSUM LINERPANEL



Notes

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

Expanding Your Solutions

Effective 01/14/2022

Pittsburg, CA

City of Industry, CA

Denver, CO

Ft. Worth, TX

ct shaft wall stud system catalog 100721 - cemcosteel.com

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