Lumber, drywall, roofing, siding, flooring, cabinets, fencing, furniture, and general cleanout material are all fine to load. The limits come from Georgia's disposal rules and from what local sites will accept.
Georgia requires yard trimmings to be kept out of lined landfills and separated from other waste. Leaves, grass clippings, brush, shrub and tree prunings, and discarded Christmas trees have to be stockpiled, chipped, composted, or otherwise reused. Interestingly, land-clearing debris such as trees, stumps, and large limbs is not treated as yard trimmings, so it can still be landfilled.
Hazardous waste, liquids, paint, solvents, fuel, and asbestos never belong in a standard container. Neither do car batteries, which Georgia keeps out of landfills entirely.
The county adds a local limit worth knowing. Its neighborhood collection sites no longer take any material thrown out from repairing, renovating, or remodeling a building, which is exactly the debris a remodel produces. That is the gap a roll-off container fills.
Have something you can't place? Ask your account manager before it goes in.