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Re: Drill and tap for A490 bolt

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As an alternative (and not knowing the specifics of
your situation), you may want to investigate  They make some cavity connection
applications that may work.  I don't know if they have
A490 grade, but it's worth investigating.

Paul Blomberg
Phoenix, AZ

--- William Pulyer <wpulyer(--nospam--at)> wrote:
> I have a connection for a client that requires a
> "blind" connection using 1" dia. A490 bolts.  Is it
> possible to develop the design strength in shear and
> tension of this bolt by drilling and tapping one of
> the plys of connection material?  The material is 1"
> minimum A572 Gr50 plate.
> How do I determine the capacity of this type of
> connection? 
> Would the plate material have to be hardened? 
> Any design guidelines available? 
> Any other suggestions? 
> Thanks, 
> William (Bill) Pulyer PE 
> Charlotte, NC 

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