Fitness Center closing for renovation Published Dec. 5, 2013 By James Branch 94th Airlift Wing Public Affairs DOBBINS AIR RESERVE BASE, Ga. -- The Dobbins Fitness Center will close Dec. 17 for renovation. Barring any delays, re-opening is expected mid Nov. 2014. Members are welcomed to visit the RTI Fitness Center at the Clay National Guard Center. Dobbins officials are currently working with Clay officials to open the RTI Fitness Center during Unit Training Assembly weekends. RTI Fitness Center 1000 Halsey Ave. Building 400 Marietta, GA. 30067 Hours: 6:00 a.m. to 8:00 p.m.