036-21539-003-B-0305
58 Unitary Products Group
1. The 2” space between the ducts allows for “jumping” an
existing roof joist.
2. The 58-1/2” overall dimension of the ducts allows duct-
work penetration between roof joists that are spaced on
72” centers.
NOTE: Ducts can be installed into the curb from the roof. All
electrical and gas line connections can be made
inside the curb.
FIGURE 18 -UNIT ROOF CURB DIMENSIONS
25-1/4"
FIGURE 19 -ROOF CURB DUCT OPENINGS
DIMENSION
FIGURE 20 -CUT AWAY OF ROOF CURB
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