One of the most vocal critics of abstract expressionism at the time was New York Times art critic John Canaday. Meyer Schapiro and Leo Steinberg along with Clement Greenberg and Harold Rosenberg were important art historians of the post-war era who voiced support for abstract expressionism.
Keyboards should be of appropriate size and key-spacing to accommodate most users. Generally, the horizontal spacing between the centers of two keys should be 0.71-0.75 inches (18-19 mm) and the vertical spacing should be between 0.71-0.82 inches (18-21 mm) (Figure 9).
Sizes and Types-The standard width of an upright piano is about 5' and the depth is between 2 - 2 '. The total floor space allowance should be about 5' wide by 5' deep, including bench space.here are four types of vertical pianos, based on piano height: Spinet, Console, Studio, and Upright. The size is measured from the floor to the top of the lid. The spinet piano measures less than 36 tall. The console measures 40 to 44 tall.