RCG / RCGH / RCA
Galvanized and Aluminum Roof Curbs
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This publication contains the installation 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.
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
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.
Record on the Delivery Receipt any visible sign of damage.
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.
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.
3.Caulk seams at all knockdown split locations. (See back page for drawing)
Handling
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.
Maintenance
This roof curb does not require maintenance under normal use.
RCG / RCGH / RCA