Most Widely Accepted and Trusted 0 ICC‐ES Legacy Report
ER‐2541
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000 Reissued 03/2016
This report is subject to renewal 03/2017.
DIVISION: 09—FINISHES SECTION: 09260—GYPSUM BOARD ASSEMBLIES REPORT HOLDER: GEORGIA‐PACIFIC GYPSUM SHAFTWALL SYSTEMS GEORGIA‐PACIFIC GYPSUM LLC 2861 MILLER ROAD DECATUR, GEORGIA 30035 EVALUATION SUBJECT: 620 SERIES SHAFTWALL SYSTEMS Look for the trusted marks of Conformity! “2014 Recipient of Prestigious Western States Seismic Policy Council (WSSPC) Award in Excellence” ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not
specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a
recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as
to any finding or other matter in this report, or as to any product covered by the report.
Copyright © 2016 ICC Evaluation Service, LLC. All rights reserved.
A Subsidiary of ICC-ES Legacy Report
ER-2541
Reissued March 2016
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www.icc-es.org | (800) 423-6587 | (562) 699-0543
A Subsidiary of the International Code Council ®
Legacy report on the 1994 Uniform Building Code™ and the 1994 ICBO Uniform Mechanical Code™
DIVISION: 09—FINISHES
Section: 09260—Gypsum Board Assemblies
studs are then fitted over the long edges of the panel. This
sequence is continuous with additional panels and studs
installed similarly.
GEORGIA-PACIFIC GYPSUM SHAFTWALL SYSTEMS
2.2 620 Two-hour Shaftwall:
GEORGIA-PACIFIC GYPSUM LLC
2861 MILLER ROAD
DECATUR, GEORGIA 30035
The basic construction is as described above under
Section 2.1 and Figure 1. A base layer of 1/2-inch
®
ToughRock Fireguard C gypsum wallboard is installed
with vertical joints over studs and attached to minimum No.
25 gage studs with 1-inch No. 6 Type S screws spaced
24 inches on center. The face layer of the wallboard is
installed with all joints offset 24 inches from the base layer
and attached with 15/8-inch No. 6 Type S screws spaced
8 inches on center. Both layers are installed horizontally.
As an alternative, one layer of the two wallboard layers
may be installed vertically. Type S-12 screws are used to
attach gypsum wallboard to No. 20 gage steel framing.
Joints on the face layer are taped and covered with joint
compound. Screwheads are also covered with joint
compound.
1.0 SUBJECT
620 Series Shaftwall Systems.
2.0 DESCRIPTION
2.1 General:
The 620 Series Shaftwall Systems consist of 1-inch
ToughRock® Fireguard (Type X) Shaftliner supported by
1
2 /2-, 4- or 6-inch “C-T” galvanized steel studs complying
with ASTM A 653 Grade 33, 0.022 inch (No. 25 gage) or
0.035 inch (No. 20 gage) in thickness. Studs are faced on
one or both sides with single or multiple layers of 1/2-inch
®
Fireguard C or 5/8-inch ToughRock®
ToughRock
Fireguard (Type X) gypsum wallboard to form a
nonbearing partition. The 1/2-inch and 5/8-inch wallboards
comply with ASTM C 36.
The basic construction is entirely built from one side
starting with a J-runner channel attached to ceiling and
floor with approved fasteners spaced at 24 inches on
center, maximum. The J-runner is galvanized steel with
21/4-inch and 1-inch legs and depth the same as the stud
depth. See Figure 6. The metal thickness of the J-runner is
the same as the C-T stud unless noted in tables. Minimum
0.035 (No. 20 gage) J-runner track is required for 10 and
15 psf loads. Minimum 21/2-inch-deep 0.022-inch metal
thickness (No. 25 gage) galvanized steel or 0.036-inch
metal thickness (No. 20 gage) galvanized steel C-T studs
are spaced a maximum of 24 inches on center. See Figure
7. Mechanical fastening of the studs to the runner is not
required. ToughRock® Fireguard (Type X) Shaftliner
panels 1-inch-thick by 24-inches-wide, by length 1 inch
shorter than ceiling height are inserted in the J-runners on
the shaft side of the wall. Each panel is fastened to the Jrunner with three 15/8-inch Type S screws. First and last
panels are fastened to the long leg of vertical J-runner with
15/8-inch screws spaced a maximum of 24 inches on
center. Horizontal manufactured cut joints in the panel
need not be back blocked, but should be staggered
minimum 24 inches between adjoining panels. The C-T
2.3 620 Two-hour Shaftwall (Air Shaft):
Where the 620 Shaftwall is used as a medium pressure
duct system in accordance with Section 601.1 of the 1994
ICBO Uniform Mechanical Code, the construction is
identical with Section 2.1 and 2.2 above, except studs are
a minimum No. 20 gage. The joints and all perimeter
connections are additionally caulked with a nonhardening
caulking compound, and the face layer of 1/2-inch
®
TouchRock Fireguard C gypsum wallboard prime coated
with an oil or emulsion paint or primer. The air shafts are
recognized for a maximum vacuum of 4 inches of water
and a maximum pressure of 2 inches of water. Refer to
Table 3 for allowable heights. Inside and outside corners
are constructed as shown in Figure 2.
2.4 621 Two-hour Shaftwall (Stairwells):
The basic construction is as described under Section 2.1
and Figure 3. A face layer of 1/2-inch TouchRock®
Fireguard C gypsum board is applied to each side of
minimum No. 25 gage studs and fastened with 1-inch No.
6 Type S screws and spaced 8 inches on center. Gypsum
wallboard is installed horizontally. As an alternative,
gypsum wallboard on one face may be installed vertically.
Type S-12 screws attach the gypsum wallboard to No. 20
gage steel framing. Joints are staggered 24 inches on
opposite sides of the wall and are taped and covered with
two coats of joint compound. Screwheads are also covered
with joint compound.
ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed
as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, Inc., express or implied, as
to any finding or other matter in this report, or as to any product covered by the report.
Copyright © 2016 ICC Evaluation Service, LLC. All rights reserved.
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ER-2541 | Most Widely Accepted and Trusted
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2.5 622 One-hour Shaftwall:
Basic construction is as described under Section 2.1 and
Figure 4. A face layer of 5/8-inch TouchRock® Fireguard
(Type X) gypsum wallboard is applied vertically to the room
side of inches on center in the field of the board. Type S-12
screws are used to attach gypsum board to No. 20 gage
steel framing. The joints are taped and covered with two
coats of joint compound along with all screwheads.
As an alternate finishing procedure to the 620 and 621
shaftwalls, veneer plaster baseboard of the same type and
thickness of core may be substituted for the outer layer of
gypsum wallboard. The veneer base is to receive a
1
minimum of /16-inch veneer plaster. Where veneer plaster
finish is used, allowable height criteria shall be for brittle
finish requirements with minimum deflection of height
divided by 240.
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2.6 One- or Two-hour Corridor Ceiling and Stair
Soffits:
The following systems provide fire-resistive protection for
the underside of stairs and at corridor ceilings in
accordance with Section 1005.7 of the Uniform Building
Code:
The basic construction is similar to that described in
Section 2.1. J-runners are attached to all intersecting
vertical and horizontal framing members outlining the
opening. Fasteners are spaced a maximum of 24 inches
on center and require a working load of 200 pounds in
shear or pullout. C-T studs are spaced 24 inches on center
®
and 1-inch TouchRock Fireguard (Type X) Shaftliner is
inserted in the top flange.
1
/2-inch
For two-hour protection, two layers of
®
ToughRock Fireguard C gypsum board are applied and
finished as described for the 620 two-hour shaftwall in
Section 2.2.
5
For one-hour protection, a single layer of /8-inch
®
ToughRock Fireguard (Type X) gypsum board is applied
and finished as described for the 622 one-hour shaft wall in
Section 2.5.
2.7 627
Two-hour
Horizontal
Horizontal Duct Protection:
Membrane
and
The J-runner and C-T studs are installed as described in
Section 2.6, except one 1/2-inch No. 6 Type S panhead
framing screw attaches the ends of each stud to the 1-inch
leg of the J-runner. The 1-inch Fireguard Shaftliner panels
are installed as described in Section 2.1, except panels are
full length and 15/8-inch-long No. 6 Type S screws spaced
at 12 inches on center are used to attach the panels to the
21/4-inch-long leg of the J-runner. A base layer of 1/2-inch
Fireguard C gypsum wallboard is attached parallel to studs
on the room side with 1-inch No. 6 Type S screws spaced
24 inches on center. A second layer of the same type of
wallboard is placed over the base layer parallel to the
5
studs and attached with 1 /8-inch No. 6 Type S screws
spaced 12 inches on center. Edge joints are offset
24 inches from the base layer. A face layer of 1/2-inch
Fireguard C gypsum wallboard is applied perpendicular to
studs and attached with 2-inch-long No. 6 Type S screws
12 inches on center. Screws are 1 inch and 6 inches from
edge joints and then 12 inches on center between. Screws
must penetrate all three layers of gypsum wallboard and
into stud flanges. Butt joints should occur between framing
members offset 24 inches from each other. Butt joints are
secured to the previous layer of gypsum wallboard with
11/2-inch No. 8 Type G screws spaced 8 inches on center
and 3 inches in from each side of a butt joint. Treatment of
gypsum board joints and fasteners is not necessary. See
Figure 5.
2.8 Alternate Construction:
For the 620 and 621 two-hour shaftwall systems, a base
5
®
layer and a face layer of /8-inch ToughRock Fireguard
(Type X) may be used in lieu of each base and face layer
of 1/2-inch ToughRock® Fireguard C.
2.9 Identification:
Each piece of 1/2-inch ToughRock® Fireguard C is
imprinted on the face of the board along one edge with
“1/2 Type X-C.” Each piece of 5/8-inch Type X ToughRock®
Fireguard is imprinted on the face of the board along one
5
edge with “ /8 Type X.” Each piece of 1-inch Type X
Fireguard Shaftliner is identified as “Type X” along one
edge. Each stud and J-runner is identified with the name,
Georgia-Pacific, the ICC-ES evaluation report number
(ER-2541) and the minimum base-metal thickness
stamped at 24 inches on center.
3.0 EVIDENCE SUBMITTED
Test reports on UBC Standard 7-1, lateral load, and
calculations, and quality control data in compliance with
the Acceptance Criteria for Steel Studs, Joists and Tracks,
dated January 1994.
4.0 FINDINGS
That the Georgia-Pacific Gypsum LLC 620 Series
Shaftwall Systems described in this report comply
with the 1994 Uniform Building Code™ and 1994 ICBO
Uniform Mechanical Code™ for one- and two-hour fireresistive noncombustible nonload-bearing partitions,
subject to the following conditions:
4.1 Construction conforms to this report and the
manufacturer’s instructions.
4.2 Maximum unsupported heights for the 620 and
621 partitions comply with Table 1.
4.3 Maximum unsupported heights
partition comply with Table 2.
for
the
622
4.4 Maximum unsupported heights for the 620 air
shaft partition comply with Table 3. The air shaft
has a maximum vacuum pressure of 4 inches of
water and a maximum positive pressure of 2
inches of water.
4.5 The maximum horizontal spans for the 620, 622
and 627 partitions used horizontally comply with
Table 4.
4.6 The assembly described in Section 2.7 may be
used to protect two-hour horizontal ducts
(horizontal duct shafts) or where a two-hour
horizontal membrane is required and is not part of
a floor-ceiling or roof-ceiling assembly. This
system is designed to support its own weight only
and should not be used where there is an attic or
loft above, or any probability of storage.
4.7 Uncoated minimum steel thickness of stud
members as delivered to the jobsite shall not be
less than 95 percent of the minimum design
thickness.
4.8 Studs are manufactured at 4817 East Sheila
Street, Los Angeles, California.
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1
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TABLE 1—ALLOWABLE HEIGHTS —620 AND 621 SHAFTWALLS (Nos. 25 and 20 Gage Studs)
STUD DEPTH
(inches)
MINIMUM
DESIGN
THICKNESS
(inches)
STUD GAGE
1
0.022
25
2 /2
STUD
SPACING
(inches)
DEFLECTION
SPAN RATIO
24
LOAD (psf)
3
15
3
5
7.5
10
120
180
240
360
17' - 3"
15' - 0"
13' - 8"
11' - 11"
13' - 3"
13' - 2"
11' - 11"
10' - 5"
13' - 8"
11' - 11"
10' - 10"
9' - 6"
11' - 11"
10' - 5"
9' - 6"
8' - 3"
18' - 6"
16' - 1"
14' - 8"
12' - 10"
16' - 1"
14' - 1"
12' - 10"
11' - 2"
14' - 8"
12' - 10"
11' - 8"
10' - 2"
12' - 10"
11' - 2"
10' - 2"
8' - 11"
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1
2 /2
0.035
20
24
120
180
240
360
4
0.022
25
24
120
180
240
360
19' - 11"
17' - 11"
16' - 3"
14' - 11"
13' - 3"
13' - 3"
13' - 3"
12' - 5"
16' - 3"
14' - 2"
12' - 11"
11' - 3"
11' - 10"
11' - 10"
11' - 3"
9' - 10"
23' - 10"
20' - 10"
18' - 11"
16' - 6"
20' - 10"
18' - 2"
16' - 6"
14' - 4"
18' - 11"
16' - 6"
15' - 0"
13' - 2"
16' - 6"
14' - 5"
13' - 2"
11' - 6"
4
0.035
20
24
120
180
240
360
6
0.022
25
24
120
180
240
360
19' - 11"
19' - 11"
19' - 11"
19' - 7"
13' - 3"
13' - 3"
13' - 3"
13' - 3"
14' - 8"
14' - 8"
14' - 8"
14' - 8"
9' - 10"
9' - 10"
9' - 10"
9' - 10"
6
0.035
20
24
120
180
240
360
28' - 0"
27' - 1"
24' - 7"
21' - 6"
27' - 1"
23' - 8"
21' - 6"
18' - 9"
24' - 7"
21' - 6"
19' - 6"
17' - 1"
18' - 8"
18' - 8"
17' - 1"
14' - 11"
1
The tabulated partition heights are based on the steel studs acting as a composite section with the wallboard to conform to the load and
deflection criteria specified in Section 1610.2 of the code.
Maximum practical stud length is 28 feet.
3
Minimum 0.035-inch (No. 20 gage) J-runner track is required.
2
1
TABLE 2—ALLOWABLE HEIGHTS —622 SHAFTWALLS (Nos. 25 and 20 Gage Studs)
STUD DEPTH
(inches)
STUD GAGE
STUD
SPACING
(inches)
DEFLECTION
SPAN RATIO
LOAD (psf)
2
15
2
5
7.5
10
14' - 6"
12' - 8"
11' - 6"
10' - 0"
12' - 8"
11' - 1"
10' - 0"
8' - 9"
11' - 6"
10' - 0"
9' - 1"
8' - 0"
10' - 0"
8' - 9"
8' - 0"
7' - 0"
1
2 /2
0.022
25
24
120
180
240
360
1
0.035
20
24
120
180
240
360
15' - 6"
13' - 7"
12' - 4"
10' - 9"
13' - 7"
11' - 10"
10' - 9"
9' - 5"
12' - 4"
10' - 9"
9' - 9"
8' - 6"
10' - 9"
9' - 5"
8' - 6"
7' - 6"
18' - 7"
16' - 3"
14' - 9"
12' - 10"
13' - 3"
13' - 3"
12' - 10"
11' - 3"
14' - 9"
12' - 10"
11' - 8"
10' - 3"
12' - 10"
11' - 3"
10' - 3"
8' - 11"
2 /2
4
0.022
25
24
120
180
240
360
4
0.035
20
24
120
180
240
360
20' - 1"
17' - 6"
15'- 11"
13' - 11"
17' - 6"
15' - 4"
13'- 11"
12' - 2"
15' - 11"
13' - 11"
12' - 8"
11' - 1"
13' - 11"
12' - 2"
11' - 1"
9' - 8"
6
0.022
25
24
120
180
240
360
19' - 11"
19' - 11"
18' - 10"
16'- 6"
13' - 3"
13' - 3"
13' - 3"
13' - 3"
18' - 10"
16' - 6"
15' - 0"
13' - 1"
16' - 6"
14' - 5"
13' - 1"
11' - 5"
24
120
180
240
360
26' - 1"
22' - 9"
20' - 8"
18' - 1"
22' - 9"
19' - 11"
18' - 1"
15' - 9"
20' - 8"
18' - 1"
16' - 5"
14' - 4"
18' - 1"
15' - 9"
14' - 4"
12' - 6"
6
1
MINIMUM
DESIGN
THICKNESS
(inches)
0.035
20
The tabulated partition heights are based on the steel studs acting as a composite section with the wallboard to conform to the load and
deflection criteria specified in Section 1610.2 of the code.
Minimum 0.035-inch (No. 20 gage) J-runner track is required.
2
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TABLE 3—ALLOWABLE HEIGHTS—620 AIR SHAFTWALL
STUD DEPTH
(inches)
MINIMUM DESIGN
THICKNESS
(inches)
STUD GAGE
STUD SPACING
(inches)
ALLOWABLE HEIGHT
2 /2
1
0.035
20
24
10' - 11"
4
0.035
20
24
14' - 1"
6
0.035
20
24
17' - 4"
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Stud heights are based upon either a transverse load of 20 pounds per square foot at a deflection of 1.14 inches or the maximum allowable
end reaction, whichever governs, as a composite section with the gypsum wallboard.
1
TABLE 4—HORIZONTAL SPANS FOR 620, 622 AND 627 C-T SHAFTWALL STUDS
STUD
DEPTH
(inches)
STUD
GAGE
1
25
20
25
20
25
20
2 /2
1
2 /2
4
4
6
6
1
CORRIDOR CEILINGS AND STAIR SOFFITS
2
HORIZONTAL MEMBRANE AND
3,4
DUCT PROTECTION
622 One-hour Fire-resistive Rating 620 Two-hour Fire-resistive Rating 627 Two-hour Fire-resistive Rating
8' - 0"
8' - 6"
10' - 3"
11' - 1"
13' - 1"
14' - 4"
9' - 6"
10' - 2"
11' - 3"
13' - 2"
14' - 8"
17' - 1"
8' - 3"
8' - 11"
9' - 10"
11' - 6"
9' - 10"
14' - 11"
Systems are designed to support their own dead weight only and should not be used where there is access to an attic or loft above or any
probability of storage.
2
1
Load of 10 pounds per square foot and deflection limitation of /360.
3
1
Load of 15 pounds per square foot and deflection limitation of /360.
4
Ducts should be designed as a separate system.
FIGURE 1
FIGURE 2
FIGURE 5
FIGURE 3
FIGURE 4
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FIGURE 6
FIGURE 7