My understanding is that you can add the GVWR's together, but I guess you shouldn't exceed the total rating, so i wonder how these haulers are doing it.
That trailer being at least 21,000 GVWR puts it all well above 26,000, and in GA you'll need a NON COMMERCIAL CDL. Easy to get by taking a test.
There is a huge case from a few years back of a guy hauling an empty trailer thru Atlanta, and was cited for the weight rating and not having the proper drivers license for the rating even though it was empty. he took it to the Supreme Court and lost.
http://www.dds.ga.gov/drivers/dldata.aspx?con=1747971758&ty=dlClass E (formerly Non-Commercial Class A)**
Truck trailer or tractor-semi trailer combination in which the combination weight exceeds 26,001 pounds and the unit being towed exceeds 10,000 pounds. Applicants for a Driver’s License in Classes E or F (non-commercial) must submit a Form DDS-36 (Affidavit showing minimum driving experience of 3 months and/or 3,000 miles in type of vehicle for class of driver’s license being applied for.)
Class F (formerly Non-Commercial Class B)**
Single vehicles weighing 26,001 or more pounds; and the unit being towed is less than 10,000 pounds; and motor vehicles included within Class C. Applicants must possess a Class C driver’s license prior to obtaining a Class B driver’s license and be at least 18 years of age. Applicants for a Driver’s License in Classes E or F (non-commercial) must submit a Form DDS-36 (Affidavit showing minimum driving experience of 3 months and/or 3,000 miles in type of vehicle for class of driver’s license being applied for.)