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RE: Footing Retrofit/Replacement Ideas

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I suppose underpinning can mean different things, but is the shoring definitely required?  Often the maximum credible loads you will have during the retrofit will be considerably less than the total load the footing is designed for, especially if snow load is involved.


Disclaimer:  I know nothing about your soils; that may or may not be a determining factor.


Ed Tornberg

Tornberg Consulting, LLC


-----Original Message-----
From: Eknrinc(--nospam--at) [mailto:Eknrinc(--nospam--at)]
Sent: Thursday, February 09, 2006 06:50
To: seaint(--nospam--at)
Subject: Footing Retrofit/Replacement Ideas


I have a project which limits me to having to upgrade a concrete pad footing bearing area. The existing footing is 4' square x 12" deep. Here are my initial ideas:


1. Underpin (this requires shoring supported beams)

2. Demolish and replace (this requires shoring supported beams)

3. Pad extension on two sides (may run into existing reinforcement for continuous flexural reinforcement installation/coring) 


Any other ideas?


Thanks in advance.