Any high-rise GCs or concrete subs here? I have a question about something I noticed at my job site.
I am interning for an interior sub-contractor that specializes in things like acoustical ceilings, framing, and drywall. My company was hired for renovations by a general contractor to install acoustical ceilings for the 15th level of a 15 floor commercial building. The building itself is sort of new and was built maybe around 6 years ago. I am no expert in concrete since my company only does interior services and I am an intern who is new to construction, but at the job site I noticed a long continuous area of the concrete ceiling that looked abnormal, and I initially thought it could be structural cracks. I attached a bunch of images of it. Please look through all of them. The images are just a portion of of the size. It stretches to the other side of the building and goes through rooms and the whole thing is about 3-4 times longer than the portions you see in the images. I asked the GC superintendent on site about it and he said that it was probably fine and said it looks like honeycomb formation in the concrete when it was first poured. He also said unless the crack is big, it’s fine. But in the images, don’t some parts look like big cracks? Especially the part on the concrete ceiling beam that I circled that looks like it has cracks on both sides. Are they structural cracks? I also attached one image of a portion of the other side of the building at the end of the slideshow. Let me know if it’s fine or if I should do anything. Thanks.