Installation
CLCH-SVN05C-EN
9
•
For new building construction
, the roof curb may be
installed as soon as the roof support members are in
place. Trane recommends that the roof curb be placed
directly on the roof support members and welded into
place. If the curb is mounted on the roof deck,
additional support is necessary directly below the curb
flanges to minimize vibration.
•
Do not overlap counter flashing over the top of the roof
curb
. Counter flashing should extend to the bottom of
the roof curb drip lip. Attach counter flashing with
fastener through the wooden nailer.
Figure 6
,
Figure 7
and
Figure 8
show typical roof curb installations and
detail.
Note:
Materials that attach to the roof curb are supplied
by the installer, including flashing, insulating
material and cant. Gasket and 2 x 4 nailer are
supplied by Trane.
Figure 5.
Typical cross section for pier mounted or
slab-mounted base
Note:
For PSCA, the base rail height is 7.25 in. Verify the base rail width
in unit submittal.
3.0 in. - sizes 3-50
4.0 in. - sizes 57-120
6.0 in. - sizes 3-120
Figure 6.
Typical roof curb installation - existing
building
Figure 7.
Typical roof curb installation - new
construction
Figure 8.
Detail of installation
Roof structure
Roof deck
Wooden nailer
2 x 4 nailer
Roof curb
4 x 4 cant
Flashing
Roof/insulating material
Counter flashing
Nail
Gasket
Roof insulation
2 x 4 nailer
Roof curb
Roof structure
Roof deck
4 x 4 cant
Flashing
Roof/insulating material
Counter flashing
Nail
Gasket
Roof insulation
2 x 4
Nailer
Roof
curb
Gasket
Nail
Counter
flashing
Flashing
Roofing/insulating
material
