The jacks are similar, but they will benefit from being arranged back to back, since the two [bass] octaves take as much space as four in an ordinary harpsichord Prior to 1980 when Keith Hill introduced his design for a pedal harpsichord, most pedal harpsichords were built based on the designs of extant pedal pianos from the 19th century, in which the instrument is as wide as the pedalboard.
Heavy-duty steel shelving of 18-gauge or lower is generally recommended for records. storage. The smaller the gauge number, the stronger the shelving; thus 16-gauge or 12-. gauge steel shelving is also appropriate. Shelving higher than 18-gauge is weaker and. may not be appropriate for records storage.
Grain characteristics are controlled to produce different levels of hardness and tensile strength. Generally, the faster a metal is cooled, the smaller the grain sizes will be. This will make the metal harder. As hardness and tensile strength increase in heat-treated steel, toughness and ductility decrease.The cooling rate used in quenching depends on the method of cooling and the size of the metal.Uniform cooling is important to prevent distortion.enerally, the faster a metal is cooled, the smaller the grain sizes will be. This will make the metal harder. As hardness and tensile strength increase in heat-treated steel, toughness and ductility decrease. The cooling rate used in quenching depends on the method of cooling and the size of the metal.