The Solera Screen Room for 21' Wide RV Awnings - Tan Mesh # LC362224 has an awning rail-to-ground measurement of 130" which is pretty standard for a 21' awning. view full answer...
All Solera screen rooms like the Solera Screen Room for 21' RV Awning # LC362224 are designed to extend out 8 feet from the coach, so the overall dimensions would be 21 feet wide by 8 feet long. view full answer...
The Solera Family Room for 15 foot awnings part # LC362230 was designed to fit the 15 foot awnings which are the shorter length you mentioned so it would be more like 14 foot 2 inch. view full answer...
I went out to the warehouse and found that the mounting bracket for the Camco RV 360-Degree Awning Roller w/ Screen Door Slide # CAM42005 measures 3-1/16" high x 1-1/16" wide with mounting holes 7/8" apart on center. The ball has about a 1" diameter and the part that holds it adds about 1/8" to the whole unit. Since about half of the ball is level with the top of the mounting bracket the whole assembly measures a little over 3-1/2" tall.
Attached is a photo with the dimensions for you... view full answer...
The size of the brackets of the Solera RV Slide-Out Awning # LCV000182037 is 1.05" from the bottom of the bracket to the top of the rivet hole. With 2-3/4" of space from the top of the vent to the top of the slide you will have more than enough room to mount the awning.
This particular awning will fit RVs with slide-outs 116" to 121" wide and up to 48" long. I have added a link to our entire selection of awnings in case you need one that is a different size, and also added a link to a... view full answer...
I had out warehouse measure the Solera RV Slide-Out Awning - 14'1" Wide - 48" Projection - Black # LCV000168112 you were looking at and from the bottom of the mounting bracket to the top of the roller measures in at 9-3/4" as shown in the included diagram, and the rail for the awning needs to be 3" - 6" above the top of the edge of the slide out.
I included a video of the # LCV000168112 for you to take a look at. view full answer...