I also have Baier ancestors from the PIttsburgh area. My grandfather Charles Frederick was born in New Kensington, PA on Oct.16 1899. His parents were Herman Fredrick Baier and Pauline Ossman Baier. Herman and Pauline bought a farm in McDonald, PA and lived there until their deaths. Both Herman and Pauline were from Heilbrohn and Untergruppenbach Germany and immigrated in 1892. The story is they eloped. Herman had a brother, William. William had a butcher shop in Bridgeville PA in the early 1900's.
Not sure my family has any ties to yours. If you think there may be a connection, pleae email me. Jane