Looking at that chart you provided raises some interesting questions. I can give you the facts regarding the aircraft that I operate. Not all the numbers correspond to the chart. Here are the numbers for our aircraft--
Max Certificated Ramp Wt -- 122,000 (AirTran operates at 121,000)
Max Certificated Takeoff Wt -121,000 (AirTran operates at 120,000)
Max Certificated Landing Wt -110.000 (AirTran operates at 104,000)
*Note--AirTran weights are for operational reasons such as reduced fees, etc.
Max Zero Fuel Wt -- 96,000
Max Usable Fuel -- 24,609
So, our aircraft have the same Ramp, TO
and LDG wts as the HGW option, but the same ZFW and usable fuel as the basic model. Typical Basic Empty Weights are around 67,300 lbs.