Trane GRAA Installation Manual page 6

Figure 3 - Roof Curb Assembly *
* The roof curb and destined unit must be sealed completely to prevent any water or air leakages (also see Figure 8).
Refer to Figures 17 and 18 for Ductwork Mounting Bracket Assembly.
6
1 Curb Rail Assembly— Side
2 Curb Rail Assembly— End
3 Cross Brace— Curb
Bolt— 3/8-16 x 1" LG. Hex Hd.
4
(8) Req'd.
3/8-16 x 1" LG. Hex Nyloc Nut
5
(8) Req'd.
1/4-14 x 5/8 LG. Hex Washer
6 Hd. Sheet Metal Screw Type
"AB" (8) Req'd.
Screw— #10 x 5/8" LG. Pan
7
Hd. Type "AB" (8) Req'd.
8 Gasket
GRAA-IN-1