ToddM wrote:Steven r wrote:Hi
Is there a reason that main stringers are listed as DF and not Hard wood? I am thinking Utile, Sipo? I am thinking Monte Carlo?
I would not let the the non-hardwood designation of Doug Fir effect my choice of using it for a project needing a "hard" wood. Doug fir is plenty dense and hard and tough. I forget the reason for hardwood and softwood designations, but the actual hardness or softness are not always factors in those designations. IIRC, Balsa is classified as a hardwood.
Conifers are considered softwoods, such as Pines, Firs, Cedars, Spruce, and Cypress. If you may think Yellow pine is a 'soft' wood, try again !!!!
Broad leaf trees are considered hard woods, for whatever reason. Balsa is a broadleaf so it gets a hardwood designation.