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Recent content by LobstaEata

  1. LobstaEata

    Solar Panel Wind Forces on Ground - ASCE7-16 vs ASCE7-22

    Greetings I am working on designing foundations and anchorages for a solar panel array on ground project in Puerto Rico where the solar panel engineer was using ASCE7-16 to develop wind forces on the panels. Note that ASCE7-16 only had a method for development on wind forces for solar panels...
  2. LobstaEata

    Risa-Revit Link

    Thanks again Josh. We are running the latest versions of the link, RISA and REVIT, so I'll take your suggestion and use the file uploader when I return to the office on Monday. Hopefully the Revit savvy dudes (or dudettes) will be able to figure this out.
  3. LobstaEata

    Risa-Revit Link

    I have been experiencing some challenges with the RISA-Revit link, where the analytical model exports from REVIT to RISA just fine, but the return trip, screws up the analytical nodes, so that some (but not all) of the analytical nodes no longer connect or become misaligned. I am still a bit...
  4. LobstaEata

    RISA 3d v14 to Risa Foundation v8

    Thanks Josh. We try to be very careful about saving in the Floor, 3d and Foundation modules separately, but you never know. Something may have happened and we forgot. Distractions are everywhere. Oh look....Squirrel! Until we figure out how to replicate this error, we'll just have to live...
  5. LobstaEata

    RISA 3d v14 to Risa Foundation v8

    Has anyone experienced all foundation definitions going missing when minor modifications (like moving a node or two) are made to the 3d model? I can understand why those foundation outlines linked to re-positioned nodes might have to be redefined in the foundation module, but why would all...
  6. LobstaEata

    Use Classification for Metals Shredding Facility

    I was hoping to gather recommendations on the use group for which a metal processing plant (shredding and sorting) would be classified. This facility is able to shred a car in about 30 seconds using a 9000 HP hammermill. MadMax kind of awesome....So cool. Metal does goes flying on the...
  7. LobstaEata

    2009 IBC 706.5.1 - Fire Wall Horizontal Continuity

    I was looking through the 2009 IBC Commentary and stumbled upon a provision that I had to read a few times to interpret and wanted to bring it up with you good folks to ask for your interpretation as well. When looking at page 7-39 of the 2009 IBC commentary (attached), the note in Section...
  8. LobstaEata

    Foundation Settlement Tolerance for Rotating Machines

    Sorry that I wasn't more clear about the scope of projects. We design foundations for small CHP power generation equipment. 10MW to 50MW machines mostly. And yes, the foundations designed are primarily single unit mass substructures supporting an entire machine.
  9. LobstaEata

    Foundation Settlement Tolerance for Rotating Machines

    Our firm has been designing block foundations for combustion gas turbine and steam turbines (either pile supported or on-grade) for a settlement tolerance of 1/4". However most soils reports I see arrive at allowable bearing pressure recommendations based on 1/2" of overall settlement. I'm...
  10. LobstaEata

    Loads resulting from locked rotor torque

    Thanks mikekilroy. I really do appreciate your responses. Fortunately, as a structural engineer, I'm not in the business of calculating machine forces, so my ignorance of some things mechanical is not in question. I just use forces provided by machine manufacturers and apply them to...
  11. LobstaEata

    Loads resulting from locked rotor torque

    Interesting question indeed mikekilroy and your interpretation is very nearly correct. What I should have said to be more clear is that since the generator is the more likely initiator of the rotational overturning force on the foundation, why wouldn't the gearbox have some type of fail safe...
  12. LobstaEata

    Loads resulting from locked rotor torque

    I'm hoping this is the correct forum to ask this question. I'm a structural engineer designing a pile supported foundation for a 10MW Westinghouse Steam Turbine Generator. I was wondering if anyone in this forum knows whether a locked rotor force couple initiated by the generator will also...
  13. LobstaEata

    Displaying Minimum Fillet Weld Size

    Hi all There has been a debate in the office regarding if it was ever appropriate to show a fillet weld call on a plan without the size. Some engineers "in the day" were taught that displaying a fillet weld symbol without including the weld size used to indicate that a minimum weld should be...
  14. LobstaEata

    NY City "Existing" Building Code. Is there such a thing?

    @dhengr You know....that sounds like a good idea. Who would have thought about that audiophonic relic under all those rolls of plans? Thanks!
  15. LobstaEata

    NY City "Existing" Building Code. Is there such a thing?

    Thank you guys!
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