A star drill on a hammer drill will go through a mountain. Forget the hammer drill -
just a hammer. Men have drilled deep holes for hundreds of years in this technique.

Fast - depends on the material.
Big - do a circle and sledge it out.
Martin
Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


Dave Hinz wrote:
On Tue, 02 May 2006 01:40:20 -0500, Jon Elson wrote:


18" thick??!!!!?? What? I can't believe your foundation is TRULY 18"
thick! The only structure I know of that thick is the cells at the
company in Amarillo that assembles nuclear weapons for the DOE.


18" stone foundations are unremarkable. My barn has 24" thick stone
walls.


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----