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Re: Anchor Bolt Value with partial bolt length into nut

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Dear Mr. Lakhani,

Without  the help of,  or in absence of availability of any hand book, I can suggest, higher shear can only be tackled with higher diameter( core diameter at the threads) or with , to some extent, with the use of a higher grade of bolt. Obviously , as told by Harold, engagement length has nothing to do with shear.

To handle tension, engagement length can be reduced by hook or welding an anchor plate at the end.Of course, you've to check the failure of anchor plate against checking the size and length of welds, broadly.

Hand books are definitely handy in time saving for regular professionals.


Dipak  Bhattacharya
On 3/7/2011 9:38 AM, Harold Sprague wrote:
Download this manual.
You can use the formulas contained to determine the capacity of the anchor rod predicated on the engagement length for tension.  The engagement length should not be an issue for shear. 

Regards, Harold Sprague


Subject: Anchor Bolt Value with partial bolt length into nut
Date: Thu, 3 Mar 2011 21:15:14 -0800
From: slakhani(--nospam--at)
To: seaint(--nospam--at)
CC: slakhani(--nospam--at)

Dear All,


Shorter than required length anchor bolts AB) were embedded into the concrete. The high strength bolt A449, 1.75 inch diameter is approximately ¼ inch short to fully engage the nut.


Is there any guideline to determine reduced capacity of the AB for tension and shear?


Any suggestion to improve the Anchor Bolt capacity to full value for tension and shear.



Thanks in advance.


Sid Lakhani