What is the maximum span of a 16' 6x6?

The maximum span of a 16-foot 6x6 will depend on the specific application and load requirements, but generally, a 6x6 can span about 8 to 10 feet when used as a beam for light loads. For heavier loads or structural applications, it's advisable to consult local building codes and a structural engineer to ensure safety and compliance. Always consider factors like wood species and grade, as they can affect load-bearing capacity.