Will it support a second floor, attic, and roof? Or just attic and roof? What is the city and state so I can look at snow loading?
Thank you. Give me a few minutes to run some numbers
Attic floor or living space floor? Will it support any ceramic tiles?
You can plan for a W10x33 beam ASTM A992 Gr. 50. It's 10" deep X 8" wide and weighs 33 pounds per foot. This will require detailing the joist connection to the beam to resist lateral torsional buckling.