Originally Posted By: ccoombs
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Just because you don?t have ?the credentials? doesn?t mean you can?t question a fix. And just because an SE or CE is involved doesn?t mean they are right.
I have found that when questioning an engineer?s design, telling them you think they are wrong at the start isn?t going anywhere. Asking specific questions of how and/or why is a better way to start and move toward the direction of why you think it is wrong. Even asking why another option wasn?t used is okay. The other concern is not to provide any detailing, sketches or calculations. This can be considered engineering without a license. Sketches of the condition or of past fixes are okay as long as they are presented that way.
As for the bolted fix, the concern is the location of the bolts. They appear to be too close to each other at each end of the strap and not enough ?end distance? to the crack/repair. Although through bolts would address any eccentric loading, there would be other issues to address. The spacing and ?end distance? on the bolts would still be an issue. Plus you would have to deal with long term issues of water and metal, assuming the other side of the footing is on the exterior of the building.
I am assuming the vertical cracks are due to tension. One source of this tension would be the raise of soil due to water or the shrinkage of soil due to the removal of water. So a strap with bolts isn?t such a bad idea. However, it should be located at the top of the footing and/or the bottom of the footing. At its current location it is only resisting movement due to seismic or sliding. And it is installed at an angle. I would also provide a good distance between the original crack and/or repair and the first bolt. I would also space the bolts per the manufacture?s specs.