![]() The vertical pier reinforcment on the left side of the pier extends up into the beam. Therefore the beam shrinkage and thermal movement has caused the cracks. There is no horizontal reinforcment that extends into the adjacent wall. It looks like this beam was poured after the walls were poured, so they are not integral with the pier. My thoughts (also see pdf notes in the link below): The bearing area is about 8" x 14" (14" wide beam) which comes out to less than 1ksi 'bearing pressure'. I ran some rough numbers there is about 9.1kip /ft (factored) and the beam is about 20 feet long. Although they admit that they may have been there before (not sure). However, they just observed these cracks early last spring. The building was constructed about 10 year ago. Some of the cracks appear to be somewhat fresh and others look older. I'm assuming this is a construction joint. I can see into the right side (worst looking side) and the faces of the concrete are very smooth. There are near vertical cracks at the end of the beam, about 8" past the face of the support. I'm looking for ideas to what might be causing the concrete cracking seen in the photos below. ![]()
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