I believe 14 feet is the longest bag awning available. I looked into the manual awnings that come on the hard sided trailer. I asked the factory rockwood rep. about it. He said that the the manual ones are too heavy and the popup roofs are able to handle them. The legs would also need to telescope.
As those manual awnings for the TT are twice the weight of the bag awnings, I fear that they would pull the roof off kilter and screw up the lift system. So I deal with the bag awning as best we can.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting