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  1. jtstruct

    USGS Ground Accelerations - what is the "max considered EQ"?

    Nevermind! I found the NEHRP commentary.
  2. jtstruct

    USGS Ground Accelerations - what is the "max considered EQ"?

    Hope someone here can help me out on what I think is a very basic questions. The USGS maps in the IBC code refer to the "Maximum Considered Earthquake Ground Motion" for short period and long period response accelerations. Fundamentally, does anyone know what the probability of these ground...
  3. jtstruct

    Driving over a buried fuel tank

    Thanks! I appreciate your time.
  4. jtstruct

    Driving over a buried fuel tank

    SlideRuleEra, Here is some more information: 1) the top of the tank is down approx. 3.5' from the ground elevation 2) it is a cylindrical steel tank, double-walled, 550 gallons 3) I think the diameter is 3' Typically the tank stays full, and it rarely falls below 50% capacity. Thanks for...
  5. jtstruct

    Driving over a buried fuel tank

    Hi Gang, I have an unusual situation, and I hope this is the right forum for this thread. We have an existing buried fuel tank in a grassy area (supplying an adjacent above ground generator). Due to limited access in the landscaped area, a truck will have to drive over this tank to access a...
  6. jtstruct

    Interior Partition Wall Pressures

    JAE, I am familiar with the 5psf interior wall load requirement in the UBC, but I have not been able to find a similar requirement in the IBC 2000. Can you provide the section where this is listed? Thanks, jt
  7. jtstruct

    Partition Weight vs. Cubicle Weight

    I would consider cubicles partition loading. Some can be awfully heavy and much more closely spaced than full blown partition walls. It seems that the 50psf live load would be the books, computers, cabinets, and everything else people cram into the cubicle space.
  8. jtstruct

    DRAG STRUT?

    I agree with JAE. You will need some sort of mechanism for developing the shear loads into your diaphragm. Based on your sketch, you appear to have two relatively close shear walls on either side, so the shear load may not be too significant. You may be able to get away with using a joist or...
  9. jtstruct

    FE exam specific to each State? (Indiana)

    The FE exam is standardized throughout the US and should be transferrable to any state in the sense that it is a prerequisite for sitting for the PE exam. Take the PE exam in the state where you plan to practice and do work. You are correct in that you must satisfy the requirements for the...
  10. jtstruct

    Carbonate vs. siliceous aggregate

    Thanks Ron for your thorough description. Very helpful!
  11. jtstruct

    Carbonate vs. siliceous aggregate

    Ron, Thank you for your response. Can you list some of the physical differences between the two types of aggregate and what we should look for? Thanks.
  12. jtstruct

    Carbonate vs. siliceous aggregate

    We are trying to determine fire ratings for an existing concrete elevated floor (pan joists at 2'-1" on center with a 2.5 inch slab). The code seperates the concrete categories into cabronate base and siliceous base. Is a core sample and testing the only way to dermine which type of...
  13. jtstruct

    Excavation in existing crawl space

    Thanks in advance for your time. I'm involved with a project where the designers plan to excavate in a crawl space to create a basement for a mechanical room. The designers have drawn a 45 degree line from the edge of the existing footings into the crawl space area. Their argument is that...
  14. jtstruct

    Short retaining wall cost

    Thank you all for your input. We have decided to use a modular/segmental block wall system. We plan to start construction next month.
  15. jtstruct

    Short retaining wall cost

    We have a condition where we would like to put in approximately 30 feet (in length) of a 5 foot wide sidewalk. The slope in this condition is approximately 6 in 12, resulting in (approx) a 2.5 foot drop along the sidewalk width. I'm trying to determine the most economical way to retain this...
  16. jtstruct

    Electro-Osmotic Pulse Technology

    Focht3: The owner in this case (and my employer) is a public university. They have had this problem in the past and are looking to find an easier and less expensive fix. This building in particular has had a long history of water problems (inches of standing water at times), and the water...
  17. jtstruct

    Electro-Osmotic Pulse Technology

    Hello Forum: I briefly mentioned this is a previous thread, but I'd like to pursue this topic futher. A local company has patented rights to this waterproofing techonology that they call Electro-Osmotic Pulse (EOP). The science is not new (water flows from positive to negative charge), but...
  18. jtstruct

    structural

    wailuku, If I'm reading your post correctly, the nails and clips are doing the opposite. They are taking the shear forces from the top plates (the collectors) and are dumping it into the shear walls that then resist the load and take it down to the foundation. When these top plate collectors...
  19. jtstruct

    Small penetrations in existing concrete slabs

    Do any of you know of "rules of thumb" available for small penetrations of existing concrete floor slabs? I have a condition where they would like to drill a small conduit (3/4") through an elevated cast-in-place floor slab (old building), or possibly drill a 3/4" groove in...
  20. jtstruct

    California PE Exam

    Ludvik, CA seems like a long way for you to travel to take the exam. Most any state grants reciprocity or "comity" to other PE's. I would only suggest traveling to CA to take the exam if you realistically see yourself working there in the future. Should you end up there eventually...

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