Ken,



I would assume ground penetrating radar or pachometer (cover meter) could help but we have looked at deep drilling for installing very long Cintec anchors and were going to have a specialty contractor do the work. It did not happen but I could get their name for you. I don't know exactly how "they" monitor their bits. 



Take care,



Eric Hammarberg

Vice President

Thornton Tomasetti

51 Madison Avenue

New York, NY  10010

T 917.661.7800  F 917.661.7801  

D 917.661.8160  

[log in to unmask]

www.ThorntonTomasetti.com







-----Original Message-----

From: The listserv where the buildings do the talking [mailto:[log in to unmask]] On Behalf Of Gabriel Orgrease

Sent: Friday, October 15, 2010 12:30 PM

To: [log in to unmask]

Subject: [BP] need some help, core bit detection in brick masonry



I need help in figuring out how to determine in real-time the depth and 

x.y.z location of a core bit within a 30" width of brick masonry wall as 

we drill down through the wall 40'. The primary intent is to keep the 

core bit at a 15" horizontal depth in the wall.... the undesired result 

is if the core bit pops out of the wall.



Best,

Ken



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