Vintage Cross Diagram Or Cross-Section Of Vintage Floor And Hardwood On 3rd FL?

Diagram or Cross-Section of Vintage Floor and Hardwood on 3rd FL? - vintage cross

Hello I am looking for a diagram in a cross section of what is obviously my word. I live in the 3rd Floor of a building, built in 1920 in Evanston, IL. Gritting my floor, and I know that the best way to cope.

Thank you very much