Stringing and Mounting the Keyboard and Action
The soundboard has been glued in the piano body, which also houses the frame. Approximately 230 steel strings are strung on the frame. The total tension on all strings measures around 20 tons, and must be supported by a strong metal frame.
The strings come in about 20 different diameters or gauges corresponding to ranges of notes of the keyboard. The strings are individually strung for the tenor, treble, and bass ranges.