It would be just as easy for you to go and open the awning and measure the distance. That way you would be certain as to the exact measurement.
Copied from Carefree of Colo website
Canopy Extension: 8'-0" (Standard
Hopefully you can now figure it out but just in case its 8 ft for the TT and 8 ft for the canopy and that equals 16ft
2004 Jay Feather 25E
2001 Ford Expedition 4X4 EB 5.4 3.55 rear
2004 Ford Expedition 4X4 EB 5.4 3.73 rear