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Purdueenginerd

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Posts posted by Purdueenginerd

  1. I have no problem with them building next to a cemetery, or living next to one for that matter. 100% of the current human population will die at some point. Some of the older cities on the east coast or europe have 300 + year old cemeteries in the middle of their cities. Some of them have miles of catacombs underneath the cities. Dead people, can't complain about NIMBY.

     

     

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  2. Better than I thought it would be, but far from great. If this truly is going to be "one of the most desirable places in Houston," the programming and architecture should be faaaaaar better. Arguably, the most prominent site in Midtown and there's not a sq inch of retail. Midtown Redevelopment Authority had to program retail all around them, Camden was so opposed to it. It's a shame that Ric Campo, also chairman of Houston First, refuses to do retail in any of their projects in their hometown. Shameful. 

     

     

    "The six acres it is building on also will include retail and a three-acre city park."

     

     

    http://www.houstonchronicle.com/business/real-estate/article/Camden-bullish-on-Houston-s-inner-city-5461618.php

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  3. Soil samples for foundation design is my initial guess. You need lateral capacity, bearing capacity, shearing force of the soils--- etc..The Engineers will then design a foundation system for the structure based on soil values, water table, liveload and dead load values from high rise. These values would have been likely gathered very early in the design phase.

     

    That being said, 20 holes seems grossly excessive given the area. I'm not too familiar with the requirements for the environmental impact studies for skyscraper construction. If I remember correctly, the phase II environmental impact studies do involve a lot soil testing as H-town man alluded too earlier in the threat. 

     

     

  4. Is that guy using a blowtorch? I will say this, our great-grandparents knew how to build. That building was effing solid. Reminds me of what they say about the Academic Building at A&M, that since they didn't know too much yet about the characteristics of reinforced concrete in 1910, they just used twice as much as they thought they needed.

     

     

    Ehh.. I disagree respectfully for reinforced concrete structures of that era. Generally I have found them to be under-designed. Reinforced concrete steel structures from that era run into two problems. The steel they use was around 18 KSI-33KSI (kilopounds per sqaure inch)  in yield capacity, or less and there was wide variety of bar design, which could allow for shear slippage of embedded reinforcement. Here's an image of some historic reinforcement used that I have at my office.  

     

    http://i.imgur.com/zMGq0lA.jpg

     

    All of the bars shown above, I've pulled off of projects in Houston, Chicago, or New Orleans. They added more, and not proportionally, because the steel was significantly weaker in tension in that era. Today, standard rebar has a yield capacity of 60 KSI. The concrete mix design is another factor which isnt being addressed. Modern reinforced concrete structures, for just about every element are significantly stronger, and better built. 

     

     

    Now, that being said... based on the most recent pictures, this looks like a composite beam. An I - beam (more correct term is W-Section) encased in reinforced concrete. In this instance, the I-beam is the primary structural component and the reinforced concrete is likely acting as a form of fireproofing, or strengthening from later structural modifications.--- I can't really tell without looking at the drawings. The guy is probably using a plasma torch to cut through the steel beam and/or rebar.... which is way faster than using a grinder or bandsaw. 

    /edit: Correction on KSI values.

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