STEP 3: Fastening Curb End Support and Curb Center Support Channel
(Items 4 & 5)
Hardware Required:
(8) Screws, SMS (A) 12 x 0.625 (IHH)
(1 or 2) Curb Cross Channel
Instructions:
• Position the Curb Cross Channel
• Align the holes and fasten using (4) 12 x 0.625 (IHH) screws.
IMPORTANT!
The following steps are for ductwork support. These steps are required only
if the ductwork will be installed prior to the ERT unit.
ERT-58 &
ERT-64
ERT-52
ERT-74
2
STEP 2: Assemble Main Curb
Hardware Required:
(24 or 32)
3
/
8
-16 x
3
/
4
Serrated Flange Bolts
(24 or 32)
3
/
8
-16 x
3
/
4
Serrated Flange Nuts
(4) Side Channels
(2) End Channels
(1) Center Channel
(2) Supply Side Channels (for ERT-74 only)
Instructions:
•
See
Main Curb Assembly
for positioning the Side, Center, and End Channels.
• Align the holes and fasten as shown below.
ERT-74
Side and center channels
fasten together, as shown.
End and side channels
fasten together, as shown.
End
Channel Lengths and Overall Curb Dimensions
Side
Length
End
Length
Center
Length
L
W
ERT-52
75.25
65.50
65.50
154.50
65.50
ERT-58
88.00
74.75
74.75
180.00
74.75
ERT-64
88.00
74.75
74.75
180.00
74.75
ERT-74
4 @ 59.75
92.75
92.75
195.00
92.75
2 @ 71.25
ERT-52 and ERT-58/64
L
W
L
W
STEP 4: Fastening Duct Cross and Side Channel(s) to Curb Cross
Channels and Main Curb Assembly
Hardware Required:
Screws, SMS (A) 12 x 0.625 (IHH)
Quantity: ERT-5
2
(16) of the above screws are needed to attach the Duct Cross and Side Channels to
the Curb Cross Channel and Main Curb Assembly
ERT-58/64 and ERT-74
(24) of the above screws are needed to attach the Duct Cross and Side Channels to
the (2) Curb Cross Channels
Instructions:
• Position the Duct Cross and Side Channels (shown in gray) as depicted
• Align the holes and fasten using the above hardware.
ERT-58 &
ERT-64
ERT-52
ERT-74
3
®
®
®
4
All dimensions shown in inches.
