How are wood joints strengthened?
I didn't think of this one.
https://www.google.com/search?source=hp&q=wood+joints+strengthened&oq=wood+joints+strengthened&gs_l=psy-ab.3...3825.3825.0.5519.1.1.0.0.0.0.137.137.0j1.1.0....0...1.1.64.psy-ab..0.0.0.O7POtOlyxcI