from
http://432park.com Originally posted by ATLksuGUY 9/20/12
Since the work today is so fast and furious, and this part of the foundation will disappear from view - I want to re-post a question I asked several pages ago, but got no response.
I'm curious about the four grillages in the core. It's seems odd these would be used here as I have not seen them used in modern highrise construction. There were usually used to distribute heavy loads in soft soil. Many Chicago skyscrapers were built this way.
I'm wondering what they would support here - I mean it seems redundant to use these ALONG WITH with the other columns using deep tendons embedded in bedrock.
I don't know if I'm making any sense. Perhaps Marcatio could help me out here?