Installation
Instructions
Topo™Ceiling System
Page 1 of 12
Before beginning installation of the TOPO™Ceiling System, check the enclosed bill of materials to ensure that
all parts are present and undamaged. Read all installation instructions and familiarize yourself with the system’s
components. This is extremely important because parts will become permanently damaged if they are installed
incorrectly! To help with identification, all parts are poly-bagged and labeled.
Parts and Installation videotape Bill of Materials (BOM) 8 Main Tee
Components
May include
some or all
of the following
4 Cross Tee (Up) 4 Cross Tee (Down) Cross Tee for Utility Circle Cross Tee for Utility Circle
PART LIST
A
B
C
D
E
F
A
F
B
E
D
C
2 Cross Tee
at Low Point at High Point
Utility Circle Main Tee Splice Plate Edge Trim Splice Cover
Corner Cover Panel Hold-Down Clip Infill Panel Infill Panel with
Utility Circle Corner
Infill Panel with Utility Circle
Formed in Center
TOPO Ceiling
System
Installation
Instructions
Page 2 of 12
Step 1: Preparation
A.
Begin the installation process by
cleaning an area large enough to lay
out all components of the T
3-Dimensional System.
OPO
B. C.
Review the parts list and 3-D and
2-D drawings. Take inventory of all
components, using the parts list as
your master reference.
D. E. F.
The 2-D plan view lists all components
and shows where each part will be
installed in the assembly.
The 3-D isometric drawing shows
locations and elevations for the Main
Tees and hanger wires.
G. H. I.
TOPO Ceiling
System
Installation
Instructions
Page 3 of 12
Step 2: Main Tee Installation
A. B. C.
Find a starting point based on a corner
location specified on the architect’s plans
or by scaling from a working drawing.
D. F.
Mark the hanger wire locations on the
Main Tees as they are shown on the
drawing plan.
Mark the hanger wire locations… …and lay out the Main Tees as shown
E.
Main Tees are hung from the high points,
on 4-foot centers. They are usually
spaced 4 feet apart and are hung at the
same elevation.
G. H. I.
on the 2-D plan, aligning them with the
hanger wire locations.
24"
48"
In cases when a Main Tee is required
2 feet from an adjacent Main Tee, it will
be hung at a different elevation. Refer
to the 3-D drawing for the proper height.
Establish the location of the highest point
of the assembly as specified by the architect. Be sure to have at least 2 inches of
clearance above this point to prevent interference with installation of the Edge Trim.
Once the vertical placement is determined,
install and bend the hanger wires as
indicated on the 3-D drawing. Then, hang
the first Main Tee.
Main Tees are connected with Main Tee
Splice Clips.
TOPO Ceiling
System
Installation
Instructions
Page 4 of 12
Step 2: Main Tee Installation
J.
To join two Main Tees, insert one tab
on the Splice Clip through the slot at the
end of one Main Tee.
K.
Then, insert the second tab on the Splice
Clip through the slot at the end of the
other Main Tee.
M. N. O
Then, bend down the Splice Clip tabs for a
tight connection.
When you’re finished hanging the first
row, examine the completed row from the
side to ensure that the hanger wires are
plumb.
L.
Next, butt the Main Tees together snugly.
Wires should hang straight and plumb
within 1 in 6, about 10 degrees. If
hangers need to be relocated, move them
now.
P.
Examine each completed row of Main
Tees from one end. It should be straight
with no waves.
If you need to install additional hanger
wires, install them now.
TOPO Ceiling
System
Installation
Instructions
Page 5 of 12
Step 3: Cross Tee Installation
A.
Before installing the Cross Tees, review
the 2-D ceiling plan to determine the
location of any Utility Circles that will be
installed at Cross Tee intersections.
B. C.
Utility Circles and their intersecting Cross
Tees are assembled separately and will
be addressed in the next section.
D. E.
Continue installing Cross Tees … … until reaching a location where a
Utility Circle will be placed.
For now, we’ll focus on standard Cross
Tees. Begin with a 4-ft. Cross Tee.
Insert the end of the Cross Tee into the
appropriate slot in each Main Tee.
F.
Then, go back to the first 4-foot Cross
Tee and begin installing the perpendicular
2-foot Cross Tee.
G.
Insert the end of the 2-foot Cross Tee into
the slot in the middle of each 4-foot Cross
Tee.
H.
Double-check the location of any Utility
Circles to be installed at intersections.
I.
For now, skip past these sections and
install the remaining 4-foot Cross Tees
first …
TOPO Ceiling
System
Installation
Instructions
Page 6 of 12
Step 3: Cross Tee Installation
J.
…then the remaining 2-foot Cross Tees.
K.
Tightly wrap the ends of all hanger wires
to prevent them from being seen from the
side after installation is complete.
TOPO Ceiling
System
Installation
Instructions
Page 7 of 12
Step 4: Utility Circle
Installation
A. B. C.
In the previous step, we installed all
standard Main Tees and Cross Tees,
working around a section where a Utility
Circle is specified. This is the open
section in the grid assembly shown here.
D. F.
The Utility Circle is ringed with four clips
that connect with the modified Cross
Tees. These clips operate just like Main
Tee splices.
G.
The Utility Circle assembly consists of one
4-inch Utility Circle and four modified
Cross Tees, factory-cut a couple of inches
shorter than standard Cross Tees.
E.
Insert the tab through the slot at the end
of each Modified Cross Tee…
H.
To begin pre-assembly, lay these
components out on a table or other
flat surface.
…then butt the components together
snugly and bend down the tab for a
tight connection.
I.
In this installation the Utility Circle has been
specified for a location where the intersecting Cross Tees curve down to form a valley.
Note: Utility Circles can also be specified
for intersections that curve up to form a
vault. There are slight differences between
valley and vault Utility Circles.
With the Utility Circle and intersecting
Cross Tees connected …
…raise the assembly into place and lock
the Cross Tees into position just like standard Cross Tees.
TOPO Ceiling
System
Installation
Instructions
Page 8 of 12
Step 5: Edge Trim
Installation
A. B. C.
Lay out all Edge Trim segments according
to their placement as shown on the 2-D
drawing.
Then, guide each Edge Trim segment into
place so that the brackets on the back
side slide over the bulb of the perimeter
tees.
D. E. F.
Edge Trim Splice Covers are used to
cover these gaps.
G. I.
Bend down the bottom lip, which will
provide a snug fit around the trim.
H.
Do not butt together adjoining lengths of
Edge Trim. Instead, leave a 1/8-inch gap
between trim pieces.
Install the Trim Splice Covers as you go:
slide the lower lip over the bottom edge
of the trim…
… and bend the upper portion over
the top of the Edge Trim.
At corners, leave a 3/8-inch gap between
the leading edge of the trim and the end
of the tee.
Each corner gap will be concealed by a
Corner Cover.
TOPO Ceiling
System
Installation
Instructions
Page 9 of 12
Step 5: Edge Trim
Installation
J. K. L.
Hold the Corner Cover in place and lower
each piece of Edge Trim into position so
that it catches the bottom lip of the cover.
M. N. O.
G. H. I.
Secure by bending the upper tab over
the top of the Edge Trim.
Use the number 6 or number 7
3/8-inch sheet metal screws provided
to secure the trim bracket to the tee.
TOPO
Ceiling System
Installation
Instructions
Page 10 of 12
Step 6: Panel Installation
A. B. C.
To prevent dust from accumulating, be
sure to install the T
all other construction activity has been
completed.
OPO panels only after
After unpacking the T
prior to installation, spray and wipe each
panel with the provided anti-static spray
and lint-free towel.
OPO Panels and
D. E. F.
T
OPO panels are designed to slip over
the tee easily yet have sufficient grip to
keep the panel edges in place.
In some cases, Panel Hold-Down Clips
may also be necessary to create a tight
fit between the panels and the grid. By
snapping a Panel Hold-Down Clip over
the bulb of the tee between two panels,
the clip keeps two adjacent panels
pressed tightly to the grid.
G. H.
Install panels surrounding Utility Circles
first. These panels have a curved notch
in one corner.
Panel Hold-Down Clips should be installed
after two adjacent panels have been laid
in place.
I.
After all T
Utility Circles have been installed…
OPO panels surrounding
…install the remaining panels as indicated
on the 2-D drawing.
Note: T
OPO Panels all have the same
shape. During installation, each panel can
simply be rotated until properly oriented
with the vaults and valleys of the T
OPO Grid.
If your installation includes T
with preformed Utility Circles, note their
locations on the 2-D drawing and install
these accordingly.
OPO panels
Technical Service
800 USG.4YOU
Web Site
www.usg.com
Samples/Literature
888 874.2450
Samples/Literature E-mail
samplit@usg.com
Samples/Literature/Fax
888 874.2348
Customer Service
800 950.3839
Note
All products described here
may not be available in all
geographic markets and are
subject to change without
notice. Consult your local
sales office or representative
for information.
Trademarks
The following are trademarks of
USG Interiors, Inc. or a related
company: T
Notice
We shall not be liable for
incidental or consequential
damages, directly or indirectly
sustained, nor for any loss
caused by application of these
goods not in accordance with
current printed instruction or
for other than intended use.
Our liability is expressly limited
to replacement of defective
goods. Any claim shall be
deemed waived unless made
in writing to us within thirty
(30) days from the date it was
or reasonably should have
been discovered.
OPO, USG.
Safety First!
Follow good safety and industrial hygiene practices during
handling and installation of
all products and systems.
Take necessary precautions
and wear appropriate personal
protective equipment as
needed. Read material safety
data sheets and related
literature on products before
specification and/or installation.
Manufactured by
USG Interiors, Inc.
125 South Franklin Street
Chicago, IL 60606
IC459/rev. 7-03
© 2003, USG Interiors, Inc.
Printed in U.S.A.
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