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clue.less
#1
Feb6-10, 08:28 PM
P: 1
this site: http://www.cpo.com/weblabs/chap3/archf.htm

helped me to understand the forces acting on each side block an arch, but it doesn't give any information about the keystone.

Can someone explain a keystone's importance? What is its function, and how does it keep itself from falling?
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