Quote:
Originally Posted by viewguysf
Did we ever verify if the foundation was drilled into bedrock on this project?
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I couldn't find anything that says one way or another for sure, but I did find
this engineering report (p. 105) from Arup when the RFP went out in 2013:
Quote:
We assumed that the Block 5 Tower would be either a heavy concrete tower or a lighter steel structure. It is zoned for 550’ tall which we assumed equivalent to approximately 50 stories for the purposes of obtaining the dynamic properties of the Tower.
The heavy concrete tower was assumed to weigh approximately 169,000 kips. We calculated that 36 seven foot diameter concrete piles drilled approximately 8’ into bedrock would be required to control settlements.
The light steel tower was assumed to weigh approximately 82,000 kips. The light steel tower has the benefit that 36 seven foot diameter concrete piles could control settlements without having to be drilled into bedrock.
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According to
this (p. 50), the building will have a concrete core and have concrete floors up to level 12, after which it will be steel. So, it will be somewhere between the two scenarios, probably closer to the light steel tower. Drilling to bedrock is probably not required, but we won't know for sure unless Clark Construction tells us.