Installing floor joists

I interviewed Keith Allen of Allen Remodeling (I did have a video but unfortunately it did not upload correctly) regarding the floor joist (or sometimes called floor trusses) that PJ Currier Lumber of Amherst NH custom engineered for our addition project in Bedford NH.  In order to clear span the first floor (meaning no columns in the garage) we needed to have specifically engineered floor joists made to conform to the Town and State building codes.