UnderfloorDuct 10/29/07 2:02 PM Page 1
C
E
R
I
.
900 Winston Churchill Blvd., Oakville, ON L6J 7X5
T 905-337-7522 • F 905-337-7426
E cer@cerinc.ca
WWW.CERINC.CA

UnderfloorDuct 10/29/07 2:02 PM Page 2
C.E.R manufactures a complete line of underfloor raceways and fittings to provide a complete installation and to suit any application, including all necessary adapters for conduit feeding or for access from our trenchduct or headerduct systems.
C.E.R. underfloor duct is CSA approved under spec C22-2 No 80 to both Canadian & U.S. standards.
Underfloor duct can be ordered in combinations of duct sizes and runs of up to four ducts and in size combinations to provide for adequate capacity in a wide variety of installations.
C.E.R. underfloor duct is manufactured from code gauge galvanized steel to provide maximum corrosion protection.
Numbers 3 & 6 ducts are commonly used either singularly or in combinations in commercial applications such as grocery stores or in other retail outlets and offices where overhead or surface raceways may not be practical or feasible.
Number 8 duct provides a heavy duty power distribution system, which is used in industrial and commercial applications such as manufacturing plants, warehouses and warehouse type retail outlets, all of which may place heavy demands on an electrical system.
Ducts are supplied either blank ( no preset inserts ) for use with after set inserts or with preset inserts with various heights ( up to 3” ) available to suit the concrete pour.
Duct inserts are 2” pipe sized zinc die castings radiused internally for safe wire pulling. 7/8” high preset inserts are considered standard for most applications requiring a 1” topping over the underfloor duct which is considered the minimum covering for the underfloor duct system.
Higher insert heights are available in 1/2” increments up to 2-7/8” ( 3” topping).
Standard spacing for preset inserts is 24”OC. 12” OC insert spacing is also available.
For all other underfloor duct applications such as Flushduct, Headerduct or Trenchduct please refer to the appropriate catalog or contact the factory for assistance.
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3”
6 1 /
2
”
1 1 /
2
”
4”
1 1 /
2
”
4”
#3 is 1-1/2” x 3” Duct #6 is a 1-1/2” x 6” Duct and has a #8 is a 4” x 4” Duct and has a cross sectional cross sectional area of 8.91 sq. inches and has a cross sectional area of 4.04 sq. inches.
Duct is supplied either blank
(#3B) or with preset inserts.
Duct is supplied either blank (#6B) or
(#6B) or with preset inserts. area of 14.78 sq. inches.
duct is supplied either blank
(#8B) or with presets inserts.
SEE CHART FOR INSERT HEIGHTS AND SPACING
Manufactured of code gauge galvanized steel.
Standard insert spacing 24” O.C.
Duct Type
#3
#6
#8
Duct Type
#3
#6
#8
Duct Dimensions
Height
(H)
Width
(W)
1 1 /
2
” 3”
1 1 /
2
”
4”
6 1 /
2
”
4”
Duct Dimensions
Height
(H)
Width
(W)
1 1 /
2
” 3”
1 1 /
2
”
4”
3”
4”
UNDERFLOOR DUCT
Preset Insert Height Options Inserts on 24” Centers
Blank
(No Insert)
3B
1”
3
1.5”
3-1.5
2”
3-2
2.5”
3-2.5
3”
3-3
6B
8B
6
8
6-1.5
8-1.5
6-2
8-2
6-2.5
8-2.5
6-3
8-3
Preset Insert Height Options Inserts on 12” Centers
Blank
(No Insert)
1”
3-12
6-12
8-12
1.5”
3-1.5-12
6-1.5-12
8-1.5-12
2”
3-2-12
6-2-12
8-2-12
2.5”
3-2.5-12
6-2.5-12
8-2.5-12
3”
3-3-12
6-3-12
8-3-12
Insert heights shown indicate height of topping over duct. Preset insert castings are aproximately 1/4” shorter than dimensions indicated to allow for covering of concrete.
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Junction boxes are placed at duct intersections to provide:
1. Access to the underfloor duct system in order to pull wires or make splices.
2. A method to separate duct runs as they cross each other at the intersection.
3. A means of connecting the duct system to conduit.
Construction:
Junction boxes are available configured with up to four openings on all four sides in combinations to provide for a wide variety of duct applications.
Multiple compartment junction boxes have interior partitions which separate the duct runs in the box and provide a continuous path through the box to the exiting duct runs.
Corner conduit feeds are also available upon request.
Standard boxes are fabricated from galvanized steel with a round 1/4” thick mild steel plate (6” cover plate is die cast). Junction boxes have adjustable cover plate assemblies which allow for 1/2” vertical adjustment upwards permitting accurate leveling to the finished floor.
Standard boxes are supplied with a 1” high adjusting ring to match the 7/8” high preset.
Boxes for use with higher presets require a junction box with a higher adjusting ring to suit the preset height.
Junction boxes are available for Quarry tile applications. Theses boxes are supplied with an aluminum ring and pan 3/4 “ deep to accept the tile. Boxes to be used with quarry tile must be specified as such as this assembly can not be added later.
A series of stainless steel pans and rings are available to accept a wide range of floor finishes.
Heavy duty junction boxes are available for applications when heavy loads will be placed or rolled over the duct systems. These boxes are constructed with 3/8” thick coverplates and the boxes are provided with adjustable support studs as required for the application. Please contact factory for further details.
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UnderfloorDuct 10/29/07 4:45 PM Page 5
One #3 duct per side.
No interior partitions.
Cover plate diameter 5-3/4”
Two #3 ducts per side.
Cover plate diameter 11-1/4”
Three #3 ducts per side.
Cover plate diameter 11-1/4”
Four # 3ducts per side.
Cover plate diameter 17”
One #6 duct per side.
No interior partitions.
Cover plate diameter 5-3/4”
Two #6 ducts per side.
Cover plate diameter 11-1/4”
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Three #6 ducts per side.
Cover plate diameter 17”
One #3 and one #6 duct per side.
Cover plate diameter 11-1/4”
Two #3 and one #6 duct per side.
Cover plate diameter 17”
Two #3 and one #6 duct per side.
Cover plate diameter 17”
One #6 duct and 3 #3 ducts.
Cover plate diameter 2 covers
11-1/4”
Two #6 duct and 1 #3 duct.
Cover plate diameter 17”
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Two #6 ducts and 1 #3 duct
Cover plate diameter 17”
Three #6 ducts and 1 #3 duct.
Cover plate diameter 2 covers
11-1/4”
One #8 duct per side.
No interior partition.
Cover plate diameter 5-3/4”
Two #8 ducts per side.
Cover plate diameter 11-1/4”
Three #8 ducts per side.
Cover plate diameter 17”
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Junction Box
Part Number
3JB
33JB
333JB
3333JB
6JB
66JB
666JB
6666JB
36JB
336JB
363JB
3336JB
636JB
6633JB
3666JB
Duct
Opening
Configuration
6666
36
336
363
3336
636
6633
3666
3
33
333
3333
6
66
666
JUNCTION BOXES
Number of
Compartments
Overall
Dimension
(X) (in.)
4
4
4
3
3
3
4
2
2
3
4
1
1
2
3
38.5
19.25
23.625
23.625
28
27.125
31.25
35
11.375
15.75
20.125
24.5
14.875
22.75
30.625
Cover-plate
Diameter
(D) (in.)
11” X 2
11
17
17
11” X 2
17
11” X 2
11” X 2
17
6
11
17
6
11
11
Carpet / Tile
Holder
Part Number
6FP-*
11FP-*
11FP-*
17FP-*
6FP-*
11FP-*
17FP-*
11FPx2-*
11FP-*
17FP-*
17FP-*
11FPx2-*
17FP-*
11FPx2-*
11FPx2-*
3S-**
33S-**
333S-**
3333S-**
6S-**
66S-**
666S-**
6666S-**
36S-**
336S-**
363S-**
3336S-**
636S-**
6633S-**
3666S-**
Duct Support
Part Number
DUCT SUPPORTS
Duct Support
Width (DSW)
Duct
Configuration
7 3 /
4
12
16 5 /
16
20 5 /
8
11 1 /
4
19
26 13 /
16
34 5 /
8
15 1 /
2
19 13 /
16
19 13 /
16
24 1 /
8
23 5 /
16
27 5 /
8
31 1 /
8
6666
36
336
363
3336
636
6633
3666
3
33
333
3333
6
66
666
To specify higher than standard adjusting ring height to match insert heights greater than 1” add one of the following suffixes to the junction box number:
1.5 for 1-1/2” high preset inserts
2 for 2” high preset insert
2.5 for 2-1/2” high preset insert
3 for 3” high preset insert
Quarry tile applications – add QT as a suffix to the junction box part number.
S336 Saddle Support for two #3 and single #6 underfloor duct
Duct supports are supplied to hold ducts in place before and during the concrete pour. Supports are manufactured from galvanized steel for maximum corrosion resistance and are available in configurations to match all combinations of duct runs as specified in the junction box listings. A chart above can be used to determine the correct part numbers.
A variety of leg heights are available to provide for pours of up to 8-3/4”. Each support is also adjustable by means of a leveling screw on each leg to provide adjustment within a range of 1-1/2”. A chart below specifies suffix number for each leg height.
All numbers specified are based on a preset insert height of 1”. For supports used with preset heights of greater than 1” subtract the height in excess of 1” from the topping depth shown on the chart that follows:
C
D
A
B
E
D UC T S UP OR T S UF
Suffix
Height of Floor
Support Depth
2 1 /
4
” 2 1 /
2
”
-
3 5 /
8
”
2 3 /
4
” 3”
-
4 1 /
4
”
4
5
7
1
3
1
/
/
/
4
4
4
”
”
”
4 1 /
2
”
-
5 3 /
4
”
6”
-
7 1 /
4
”
7 1 /
2
”
-
8 3 /
4
”
Please note that chart is based upon standard 1” concrete topping over the duct. If the concrete topping is greater than
1” subtract additional amount of topping from floor depth figures.
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A variety of stainless pans and rings are available which fit the round junction box cover plate to accept a wide variety of floor coverings. The “pan” style accessories are available in single lip used for tile and carpet and double lip used for carpet (provides protection against fraying on both cut edges. 1/8” deep pans normally supplied for tile 1/4” deep and normally supplied for carpet.
Also available is a carpet ring which installs over the cut joint in the carpet and stands up better against loads which can deform the “lip” of conventional carpet pans.
Single lip carpet/tile pans – available 1/8” or 1/4” deep
Double lip carpet pans – available 1/4” deep
300 After set inserts 2” IPS 1” high two piece assemblies to provide an outlet in blank duct, can be installed after pour (3” hole required in concrete 2-1/2” hole in duct) or installed pre-pour when only a few outlets are required and location is known prior to pour (if ordering for pre-pour installation order #304 mud cap as well). Extensions are available 1/2” (#270) or 1” high (#272) as required.
304 Mudcap fits all 2” IPS preset/afterset inserts. Recessed to hold 3/8” concrete.
270 Duct Extension 2” IPS 1/2” high.
272 Extension 2” IPS 1” high.
305 Marker Cap (brass) replaces mudcap on inserts to indicate location of duct run.
306 (SS) slotted
307 (SS Philips)
315 Duct coupling for #3 duct (one required every 10ft piece of duct)
615 Duct coupling for #6 ducts.
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ELBOWS
345FE for #3 duct
645FE for #6 duct
845FE for #8 duct
390FE for #3 duct
690FE for #6 duct
890FE for #8 duct
390VE for #3 duct
690VE for #6 duct
890VE for #8 duct
END BLANKS
330 for #3 duct
630 for #6 duct
830 for #8 duct
BOX PLUGS
340 for #3 duct
640 for #6 duct
840 for #8 duct
JUNCTION BOX REDUCING PLUG
641 reduces #6 box opening to #3 duct
CABINET CONNECTOR
380 for #3 duct
680 for #6 duct
880 for #8 duct
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CONDUIT ADAPTERS – JUNCTION BOX TO CONDUIT
364 #3 box opening to single 2” conduit
664 #6 box opening to single 2” conduit
864 #8 box opening to single 2” conduit
354 #3 box opening to double 2” conduit
654 #6 box opening to double 2” conduit
854 #8 box opening to double 2” conduit
JUNCTION BOX CORNER CONDUIT ADAPTER
395 J Box Corner to 2” IPS
CONDUIT REDUCERS
260 2” – 1-1/2”
261 2” – 1-1/4”
262 2” – 1”
263 2” – 3/4”
264 2” – 1/2”
OFFSET
325 for #3 duct
625 for #6 duct
825 for #8 duct
EXPANSION JOINT
320 for #3 duct
620 for #6 duct
820 for #8 duct
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DUCT REDUCER
660 for #3 duct to
#6 duct
SEALING COMPOUND
280 sealing compound for joints and/or ducts at junction box opening
(one 4 litre pail/1000ft #3 duct)
CONDUIT ADAPTERS – DUCT TO CONDUIT
372 #3 duct to single 2” conduit
672 #6 duct to single 2” conduit
872 #8 duct to single 2” conduit
355 #3 duct to double 2” conduit
655 #6 duct to double 2” conduit
855 #8 duct to double 2” conduit
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