What are some of the reasons August Wilson calls this play "Fences"

Bono further elaborates on the play’s chief metaphor. In handling the wood for the Maxson’s fence, Bono is surprised that Troy didn’t get soft pine wood. Troy responds that the hard wood he bought may just last forever. This exchange highlights Troy’s own unreasonable feelings of invincibility. He compares his own life to that of the fence he is building, meant to be a symbol for Troy’s emotional hardness. Troy’s fence becomes not just a barrier to his relationships with his family but also a monument to his failings as a father and husband.