What size beam you need to support a 16 ft span load bearing wall?

To determine the appropriate beam size for a 16 ft span in a load-bearing wall, factors such as the type of load (live load and dead load), wood species, and beam material must be considered. Generally, a glulam or steel beam is often recommended for such spans. A common choice for a residential application might be a 3x10 or 4x10 wood beam, but for accurate sizing, it's essential to consult local building codes and a structural engineer. Always ensure the beam is properly supported and complies with relevant safety standards.