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.
The standard construction of interior framing in a home uses 16-inch on center (OC) spacing for ceiling joists. Joist spacing in this design mode incorporates different types of wood used in ceiling construction, including #2 grades of southern pine, Douglas fir and hemlock fir types, which are the most common.his will support a room ceiling that is 10 feet long on one side â as in 10-foot by 15-foot or 10-foot by 17-foot rooms â which is a standard dimension for many rooms in residential construction.