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.
1 Costs vary by piano moving company and run $7-$10 per $1,000 of value. 2  When a piano is moved as part of an entire household, the insurance rate may be about $3.50-$4 per pound. 3  An average upright weighs 550 pounds, a baby grand 600 pounds and a grand 820 pounds. A piano that needs to be lifted through a window by a crane can cost $750-$2,000, depending on access. 2  A 21x62 window opening is needed for a grand piano. 3  Insurance to cover the piano move should be high enough to cover its full replacement.