Greenheck 471555 Installation, Operation And Maintenance Manual page 4

Curb Installations
Greenheck supplies gasketing material for all multi-
section curbs and/or plenums. Install gasketing prior
to bolting split curbs and or plenums together.
NOTE: Steel, concrete or wood support is per
structural engineer and in accordance with load
requirements and applicable building codes.
Structural Steel
Continuous Weld or Stitch Weld
6 in. minimum stitch weld x 3-1/4 in. spacing
Minimum 6 in. weld on each corner.
(hardware by others)
Steel structural support
(by others)
Concrete Deck
NOTE: Steel, concrete or wood roof support is per structural engineer and
in accordance with load requirements and applicable building codes.
Install 1/2 in. bolt
5-1/2 in. maximum bolt spacing
4 in. maximum spacing from curb corners
(hardware by others)
Concrete structural support
(by others)
NOTE: Steel, concrete or wood roof support is per structural engineer and
Wood Deck
in accordance with load requirements and applicable building codes.
Install 1/2 in. lag or thru-bolt
(as determined by structural engineer)
with 1 in. washer in each hole shown above
(hardware by others)
Wooden structural support
(by others)
4
Vektor-CD Centrifugal Laboratory Exhaust
Greenheck Roof Curb
for Vektor Systems
Greenheck Roof Curb
for Vektor Systems
Greenheck Roof Curb
for Vektor Systems
Bases—Foundation and Isolation
Critical to every fan installation is a strong, level
foundation. A reinforced poured concrete pad with
a structural steel base or inertia base provides an
excellent foundation. Structural bases must be sturdy
enough, with welded construction, to prevent flexing
and vibration.
To eliminate vibration and noise from being transferred
to the building, vibration isolators should be used.
The fan is mounted directly on the isolation base and
must be supported for the entire length of the fan base
angle (Refer to the installation manual for structural
bases if the base was supplied by Greenheck).
Isolators are installed between the isolation base and
the foundation.
After the fan, isolation base and isolators are installed,
the entire assembly must be leveled. Position the level
on the isolation base, not the fan shaft, for proper
leveling. Additionally, the motor and fan shafts must
be level and parallel relative to each other for proper
alignment.
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