Installation - Mechanical
16 CLCH-SVX010A-EN
Assembly Instructions
The base is constructed for specific installation
requirements such as standard roof curbs, structural
support curbs, steel I-beam dunnage support, and pier
mounting.
Standard Roof Curb
The unit exterior base channel is constructed to overhang
the roof curb. Unit support is provided by a square tube
channel locate inside of exterior base channel. The
standard curb should be designed to properly support the
unit’s weight without bow and sized to fit within the
perimeter base channel.
For large units shipped in sections, see additional
requirements in “Roof Curb for Large Unit with Shipping
Splits,” p. 17
Structural Roof Curb and I-Beam Dunnage
The base for structural roof curbs (Figure 11) and
I-beam dunnage (Figure 12) are designed to sit directly
onto unit support with no overhang. The structure should
be designed to properly support unit weight without bow
and sized to the unit’s perimeter exterior base channel.
For large units shipped in sections, see additional
requirements in “Roof Curb for Large Unit with Shipping
Splits,” p. 17.
WARNING
Risk of Roof Collapsing!
Failure to ensure proper structural roof support could
cause the roof to collapse, which could result in death
or serious injury and property damage. Confirm with a
structural engineer that the roof structure is strong
enough to support the combined weight of the roof
curb and the unit. Refer to submittals for weights of
unit and curb.
Figure 10. Standard roof curb
Air handler
base structure
Roof curb Insulation
Figure 11. Structural roof curb
Figure 12. I-beam dunnage mount
Air handler
basic structure
Structural
steel curb
Air handler
base structure
Dunnage
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