Sistering Sisters

I am my Sister's Keeper

There is a term in carpentry called Sistering. It’s when a ceiling or floor joist—the wood—becomes too weak to handle the load that is put upon it. The builder, to save the structure from collapsing, will strengthen the joist by putting a new piece of wood next to it and fastening them together, tightly with nails and glue. Sometimes the structure is so…