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RE: New Steel to Existing Concrete

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I'd suggest you request a demonstration of our FS-10 Ferroscan rebar locator
by your local Hilti rep.  It was developed in response to this problem.  I
personally witnessed it being used successfully to enable the re-positioning
of large numbers of steel beam connections on the KLCC (Petronas) Towers in
Kuala Lumpur about 5 years ago.  It's pretty good up to 5 inches,  provides
a digital image, carries a hefty price tag.  Further info on the FS-10 is
available at

J. Silva, SE
Hilti, Inc.

> ----------
> From: 	Robert Rollo[SMTP:rrollo(--nospam--at)]
> Reply To: 	seaint(--nospam--at)
> Sent: 	Wednesday, February 17, 1999 8:35 AM
> To: 	'seaint(--nospam--at)'
> Subject: 	New Steel to Existing Concrete
> every time we try to connect new steel beams to existing concrete columns
> or beam, the driller will hit rebar despite all detailing and layout
> efforts to the contrary.  obviously, upon hitting rebar, the contractor
> calls for guidance, we attempt to determine adequacy of the member with
> interupted reinforcing, etc. etc.
> anyone have better solution to this age old delema ? short of don't
> connect new steel to old concrete ? 
> am i missing something so obvious it is slapping me in the face? 
> can i prevent the phone calls next time ? or am i forced to accept this as
> a universal constant ? 
> thanks in advance for any thoughts . . . 
> robert d. rollo, PE 
> Corporate Associate 
> rrollo(--nospam--at) 
> (806) 747-0161vox 
> (806) 747-7146 fax