Roof Curb Assembly Instructions
FRAME ASSEMBLY
1.Take one end piece (locking tabs) and one side piece (slots). Stand both pieces vertically on the floor or roof. See Figure 1.
2.Raise slightly the corner of the end piece (locking tabs) and mate with side piece (slots), ensuring that lower locking tab with leading edge is through slot opening. See Figure 2.
3.Push down on top edge of end piece. Ensure that all 3 of the locking tabs are feeding into each correspond- ing slot. Once both pieces are flush, the process is complete. See Figure 3.
4.Drive one spike provided into wood nailer strips at each corner. See Figure 3.
Roof Curb Assembly
| Figure 1 |
side piece | end piece |
slot for tab | locking tab |
FRAME APPLICATION AND LOCATION
This roof mounting frame provides necessary support when the unit is installed. The frame can be installed directly on deck having adequate structural strength or on roof supports under deck.
SECURING THE FRAME
Figure 2
wood nailer strip
wood nailer strip
To ensure proper mating with unit, it is critical that mounting frame be squared to the roof, as follows:
side piece
slot for tab
end piece
1.With frame situated level in desired location on roof trusses, tack weld one corner of frame.
2.Measure frame diagonally from one corner to the opposite corner. Repeat with the remaining two cor- ners. These dimensions must be equal for the frame to be square.
3.It is extremely important to sight frame from all cor- ners to ensure that the frame is not twisted across top side. Shim frame under any low sides.
4.After frame has been squared, straightened and shimmed, weld or attach frame securely to roof.
MAX. SLOPE TOLERANCE: 1/16" per linear foot in any direction.
locking tab
Figure 3
wood nailer strips
spike
tabs through slots
Note specification of duct location on bottom of HRV when positioning cross members (duct cavity).
11
