Our old farmhouse was built around 1900 – when people were apparently very skinny (our stairway is only 33″ wide) and short. The staircase is so narrow that it left us stumped for the last few years on how to add a handrail to bring it up to code, and more recently to make sure neither of us took a tumble with the baby. Then I saw this photo on pinterest and was SO inspired: Since we live in an older farmhouse, we like to use a combination of aged wood, tile/stone, and different metals in…