From what I've read on here, a 40-55 gallon tank seems to be the consensus for absolute minimum for an adult beardie. Your dimensions are for a 50 gallon tank. Good luck!
I was most satisfied after upgrading to a 48x24x24 because of the extra space and landscaping options, but the one you described will work for an adult.
I just set Swordtail's timer for his bath and paused it so I could actually fill his soaking bowl up and he crawled over my phone and canceled the timer
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!