I was not very happy with the supplied awning brackets for either of the awnings I have had so I made my own, for several reasons:
1. the brackets only secured to a single rail on the rack (Rhino-rack Pioneer) and I wanted it to spread over at least 2 - particularly for the 'free-standing' 270 degree awning
2. I needed it at a different height than the supplied ones would provide
3. not at all happy with the idea of a hex head bolt in the tiny channel on the awning so I made my own version using suitable stock cut to fit neatly into the channel with 1 or 2 bolts threaded and welded into it to spread the load over a much greater area
4. brackets did not look all that strong, maybe fit-for-purpose but I prefer a little more security with all those corrugations
Mine may be over-kill, but I've never had an issue with these.
This one is for my 30 Second 270 degree awning to show what I mean.
Attachment 89200