Form I-ADF, Page 8
FIGURE 3 - Cross Support Mounting Requirements
5.0 Mounting
(cont'd)
5.3 Mounting on
Field-Supplied
Supports
(cont'd)
5.4 Mounting on a
Roof Curb
CAUTION: Before assembly, re-check to be sure that the correct
curb has been ordered. Be sure that the curb selected matches
the unit ordered. Verify the dimensions of the curb received with
the curb dimension table, FIGURE 4.
Installation Instructions for 16" Optional Roof Curb (Option CJ3) - Refer
to FIGURE 4
NOTE: Curb rail sections and hardware for assembling curb are provided with
optional roof curb. Insulation and ashing are eld supplied.
1. Position the curb cross rails as shown in the assembly illustration in FIGURE 4.
Fasten curbing pieces with bolts and lag screws as illustrated in the corner detail.
2. Check the assembly for squareness. The curb must be adjusted
so that the diagonal measurements are equal within a tolerance of ± 1/8".
3. Level the roof curb. To ensure a good weatherproof seal between the curb cap and
the roof curb, the roof curb must be leveled in both directions with no twist end to
end. Shim as required and secure curb to roof deck before installing ashing.
4. Install eld-supplied ashing.
5. Before placing the unit into position, apply furnished 1/4" x 1-1/4" foam sealant
tape to the top surface of the curb, making good butt joints at the corners. The
unit must be sealed to the curb to prevent water leakage into the curb area due to
blowing rain and capillary action.
FIGURE 4 - Optional Roof Curb (Shipped separately to be eld assembled)
IMPORTANT: Area enclosed by roof curb must comply with clearance to combustible
materials.If roof is constructed of combustible materials, area within curb must be either
ventilated, left open, or covered with non-combustible material which has an "R" value of
at least 5.0. If area within curb is left open, higher radiated sound levels may result.
Curb Layout and Dimensions Curb Detail
Corner Detail
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