Sharing webapps folder in tomcat cluster

[Paolo Santarsiero]

I have a load balancing cluster with two tomcat6 and one apache2.2. I use
replication sessions and all work fine. Now I'd like to use a common
webapps  folder on third machine where to put my applications and I'd like
tomcat's instances go all there to deploy and use application. I don't know
if this way is possible, because in all documentations I read that the
applications must be replicate in all tomcat webapps. Can someone help me?
Thanks