Calculated Industries 4090 - Manual (Page 71)

70 — ITI S
HEET
M
ETAL
/HVAC P
RO
Calculating Angles Between Objects Example
LEGEND
1 Existing Roof Curb
to remain.
2 New 20’ x 20’ duct
down through Roof
Curb to system below.
3 New Roof Top Furnace
with integral curb.
4 Field measure duct
required from the
existing roof to new
Roof Top Furnace.
5 Existing Roof Drain
to remain.