Trane GRCA - Page 4

Roof Curbs for arrangements D
and E include an evaporative
cooler platform. See GRAA-IN-2.
Roof Curbs ship knocked down for
ease of handling and storage. The
field assembly and mounting of the
curb to the roof is the responsibility
of the installer. All curbs ship
complete with pre-assembled side
and end rails, cross member
supports, ductwork connector
brackets, hardware, optional
insulation and gasketing. See
Figures 3, 17, and 18 for a
complete parts list for your curb.
Check to see that all components
are included. Refer to Figures 3, 4,
5, 6, 17, and 18 to see if all other
field supplied parts are also on
hand.
Provide a suitable opening, or two
openings, in the roof as suggested
per Figures 2 & 4. These return
and/or supply air ductwork open-
ings have been calculated to in-
clude a one inch clearance on
each side of the ductwork. The in-
staller may determine other open-
ing(s) to accept return and/or
supply air ducts to suit particular
needs.
Figure 1 - Dimensions
Capacity W+ B+
10,15 26-7/16 (672) 30-3/16 (767)
20,25,50 37-7/16 (951) 41-3/16 (1046)
30,35,60,70 48-7/16 (1230) 52-3/16 (605)
40,80 53-15/16 (1370) 57-11/16 (1465)
Approximate Roof Curb Weights
* R A Capacity 10,15 20,25,50 30,35,60,70 40,80
B 10 thru 40 115 133 151 161
D 10 thru 40 145 163 181 191
B
C
50 thru 80
10 thru 40
150 168 186 196
D
E
50 thru 80
10 thru 40
180 198 216 226
G 20 thru 40 NA 179 197 207
* R A Capacity F+ H+ J+
B 10 thru 40
29-5/8
(752)
71-1/8
(1807)
67-3/8
(1711)
D 10 thru 40
29-5/8
(752)
71-1/8
(1807)
67-3/8
(1711)
B
C
50 thru 80
10 thru 40
29-5/8
(752)
97-1/8
(2467)
93-3/8
(2372)
D
E
50 thru 80
10 thru 40
29-5/8
(752)
97-1/8
(2467)
93-3/8
(2372)
G 20 thru 40
37-3/16
(945)
107-5/16
(2726)
103-9/16
(2630)
Notes:
* RA = Rooftop Arrangement
+ Dimensions are in inches.
(Dimensions in parenthesis are in millimeters.)
1 lb. = 0.453 kg
NA = Not Applicable
Dimensional Data
Arrangement Capacity
B 10-80
C 10-40
D 10-80
E 10-40
G 20-40
4 GRAA-IN-1