RCG / RCGH / RCA
Galvanized and Aluminum Roof Curbs
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This
publication
contains
the
installation
When installing the roof curb, if the fan or gravity hood
is to be installed at a later time, cover the curb to protect
it from the elements. This includes covering the
insulation, attentuators if applicable, and dampers.
Curbs with liners need to be covered, as the liner is not
weatherproof.
instructions for galvanized and aluminum roof curbs.
Hurricane roof curbs and lab exhaust roof curbs have
special instructions.
Cook roof curbs are designed for use with Cook
units. For uses other than the intended design, it is
responsibility of the engineer of record to determine
suitability of the roof curb.
Moisture can get trapped in the insulation and cause
mold.
Knockdown Curb Assembly Instructions:
1. Place knockdown curb pieces on a flat surface with
knockdown plates facing each other. Units with multiple
splits will be identified near the knockdown plates. Be
sure to match identification marks.
2. Secure knockdown plates together at each split
location with bolts and nuts in all holes provided in
knockdown plates. If curb comes with an angle brace,
install the brace with the uppermost bolt and nut on the
knockdown plates.
All of the publications mentioned above can be obtained
from Loren Cook Company by phoning 417.869.6474,
extension 166; by FAX at 417.832.9431; or by e-mail at
For information and instructions on special equipment,
contact Loren Cook Company at 417.869.6474.
Receiving and Inspection
Immediately upon receipt of a RCG / RCGH / RCA unit,
carefully inspect it for damage and shortage.
3. Caulk seams at all knockdown split locations.
(See back page for drawing)
Record on the Delivery Receipt any visible sign of
damage.
Handling
Maintenance
This roof curb does not require maintenance under
normal use.
Lift the roof curb by strap through the center.
Storage
If the unit is stored for any length of time prior to
installation, cover the curb to protect it from the elements.
This includes covering the insulation, attentuators if
applicable, and dampers. Curbs with liners need to be
covered, as the liner is not weatherproof.
Moisture can get trapped in the insulation and cause
mold.
Installation
CAUTION
The attachment of roof mounted fans to the roof
curb as well as the attachment of roof curbs to the
building structure must exceed the structural
requirements based on the environmental loading
derived from the applicable building code for the
site. The local code official may require variations
from the recognized code based on local data. The
licensed engineer of record will be responsible for
prescribing the correct attachment based on
construction materials, code requirements and
environmental effects specific to the installation.
Attachment methods vary depending on the job
requirements and should be made per local code & / or local
conditions, per the engineer of record.
RCG / RCGH / RCA
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