Hello, I came across this forum searching about installing a basement support beam. Bought a century home and am re-doing the basement. Our house inspector suggested a beam in the basement to prevent sagging, it is only a single wide lot and was never built with a support beam. The dimensions are 15' x 30'. I was thinking about running a beam from the front to back. Any suggestions on what to use for material and how man poles to add would be appreciated. I was told 2 2x8's with a layer of particle board in the middle. Do the 2x8's need to be a complete 30' long or made up of pieces.