Is a thrust bearing included, The picture shown does not show the rotor mount does it come with this item as well?

The thrust bearing (for rotating masts) or the mast clamps (for non rotating masts) are sold separately and are not included. The rotator shelf is part of the structure of the tower - it is the upper shelf that you see pictured. Thanks!

Would this support a hex beam and how High could I go with the mast? Thanks

Wind Load Ability: 10.5 sq ft (85 mph) / 4.3 sq ft (150 mph) Maximum Mast Diameter: 2.375 inches Maximum Mast Length: 8 feet Maximum Balanced Load Weight: 125 lb center-balanced