"joevan" schreef in bericht
news
On Fri, 07 Sep 2007 12:46:08 GMT, joevan
wrote:
Thanks for that. I think I understand that they put down heavy pile
pulling anchors. Never seen that done but I can imagine they involve a
lot of concrete.

Found this, I guess it explains a bit more.

http://www.freepatentsonline.com/20040131428.html

Thank you for the research, it is all new to me.

Have a nice day

Willem