![]() ![]() From Nov-2006 to Jun-2007(time letter was written) they recorded continuing uplift of the trestle of 1-7/8 to 2-1/4 inches across the trestle. began monitoring the Trestle erected to facilitate excavation of the Podium/Mid-Rise. This location was troublesome early in the project, with water seeping into the excavation while the tie-back work was going on.īeginning in Nov-2006 Surveyor, Martin M. The tower/podium shoring wall in this area has two sections where the CDSM shoring wall has soldier piles at 2.5 ft OC. The parking garage walls incorporated an integral waterproofing admixture. I'm quite certain the main water leakage/cracking is in the north & west walls of the lower parking levels. ![]() SG&H was the waterproofing consultant for the Millennium Tower project and the cracking in the bottom levels of the parking garage, immediately adjacent to the tower/podium shoring wall, will likely remain a chronic problem for the Millennium HOA. The Dan Brown & Associates letter from 23 November 2021 is also at. There are new photos on - The 3rd to last photo shows a center bar in the pile much larger in diameter than the #18 high strength threaded bar previously proposed. Crews will be able to accomplish the objectives of the previously planned retrofit with the reduced number of piles, Hamburger wrote, though he noted that the building’s tilt would not be corrected as much as had been previously predicted. New calculations show piles can bear more weight than was previously known - an estimated 1 million pounds, per Hamburger’s letter, up from 800,000. SF Business Times: "Less is more: Engineers behind Millennium Tower fix have a new strategy" "The required construction is neither complex nor unusual." Ron Hamburger RE: SF Tower settlement Part III dik (Structural) That's 18 million pounds.Ĥ1.6 - 18 = 23.6 million pounds to be held up with something yet to be described. The new proposed piles can each hold up 1 million pounds. Or looked at another way: if the old piles were needed to hold up 52 X 800,000 pounds, then their total uppicity would be 41.6 million pounds. Perhaps they're going to lighten the building? Maybe restrict the number of pianos in each unit? Individually.Ĭorrect me if I'm missing something, but isn't 2.32 (million) a whole lot bigger than the 1 (million) that is mentioned? The amount the New Piles would have to hold up. If the Old Piles could hold up 800,000 pounds each, then my calculations: That would appear to be the new supported weight per pile, compared to the old (52) quantity. ![]() We'll call that 2.9, to continue to avoid the higher math. So you guys should like maybe do some sort of analysis on the following: Now I realize I'm only using arithmetic, instead of some higher math. ![]()
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