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RE: Bolt Holes, Another Application

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I have done it 2 different ways.

1.  Put shear lugs on the setting template & weld a bar from the base plate
to the setting template.  That way the shear never goes through the anchor

2.  For smaller shear loads:
	a. Use the oversized base plate holes (for ease of erection).
	b.  Provide plate washers 3" x 3" x 1/4" (with the standard 1/16"
oversize holes) under the head of the anchor bolt.
	c.  Weld the plate washer to the base plate.

Harold Sprague
The Neenan Company

-----Original Message-----
From: Bill Sherman [mailto:SHERMANWC(--nospam--at)]
Sent: Thursday, April 15, 1999 10:44 AM
To: seaint(--nospam--at)
Subject: Re: Bolt Holes, Another Application

Another question on standard vs oversized bolt holes - what about holes for 
anchor bolts in base plates where shear is to be transferred from the base 
plate to the anchor bolt?  While contractors prefer to use oversized holes
base plates due to construction tolerances, how can you count on shear 
transfer if holes are oversized?  (i.e., with reversible wind or seismic 
I normally specify anchor bolts to be placed using a template and use
hole sizes (1/16" over bolt size) where shear is to be transferred, but I am

curious as to what others do.