Irma is of Germanic origin, and it is used mainly in the English, French, German, Indian, Italian, and Spanish languages. The name is derived from the short form of German names with the first element irmin (meaning 'whole, immense, universal') or ermen and starting with 'Irm-', such as Irmingard.
Wood framing, or light frame construction, is the assembly of dimensional lumber or engineered wood lumber that is regularly spaced and fastened together with nails to create floor, wall and roof assemblies. Wood is the most common material used within the construction industry today.
Whitewood is a term cabinetmakers use for a secondary, utility lumber, used for unseen things like toe kick framing, cleats, brackets, webbing, etc. There are a variety of species that get called whitewood, such as pine, poplar, spruce. Framing lumber should be stamped and you will see SPF on the stamp. This means the lumber is Spruce, Pine (southern yellow) or fir/hemlock all of which could be called whitewood. These days, I only see spruce in my area.