Causes. In ALS, the nerve cells that control the movement of your muscles gradually die, so your muscles progressively weaken and begin to waste away. ALS is inherited in 5 to 10 percent of cases. The other cases appear to occur randomly.
1 The smaller studio uprights usually weigh between 400 and 600 pounds. 2  The monstrous full vertical or large upright piano can weigh as much as half a ton.  A studio piano's center of gravity is also lower than a large upright's, as it is about 4 feet (1.2 m) tall as opposed to a large upright's roughly 5-foot height.
Baby grand piano (generally under 5 feet) weigh in at about 475 pounds. Parlor grand pianos (about 5'6) weigh about 525 pounds. A full concert grand piano at 9 feet or longer â¦ can weigh as much as 1000 pounds. Types of Grand Pianos for New Buyers If you are in the market for a grand piano, it is often difficult to determine which grand piano you need. 2  There are many different types of grand pianos, and to newcomers, tâ¦.