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  1. BMart006

    P.E. License

    I took EET's course for civil (structural depth)and was very impressed with the course outline and also the preparatory notes they provide for the exam. They also include numerous practice problems and if I remember correctly, two practice exams. It's expensive, but better than taking the exam...
  2. BMart006

    bending torsion instability of steel pipe

    I'm sure there is some good literature out there, and I recommend you continue to seek it out, but the easiest way to sort through this is to consider the behavior of beams in a general sense. And yes, klaus is correct that it's important to distinquish between LTB and what you learn in...
  3. BMart006

    bending torsion instability of steel pipe

    I'm not familiar with the Eurocode, but I believe the question you're asking is can a pipe be subjected to lateral-torsional or flexural-torsional buckling, right? The answer to those is no. Consider that the radius of gyration is the same in all directions.
  4. BMart006

    Intermittent fillet welds & corrosion

    Regardless of code requirements, not using intermittent welds in corrosive environments is a good design principle. Couple reasons: 1. Rusting causes expansion of the material. When rusting is inside a joint (such as internal to intermittent welds) there is a significant pressure created by the...
  5. BMart006

    Online MSCE programs and specialty Masters

    I did part of my master's at NC State online (civil engineering program with structural concentration). After four semesters I decided to transfer to a local university to do research, but while I was at NCSU, I thought the program was well organized. Exams could be administered by a non-direct...
  6. BMart006

    RCSC Turn of the Nut Specified Rotations

    Alright bolt experts, help me understand something. I'm a little confused based on the reading I've done to this point on pre-installation verification and its purpose for bolts installed via the turn of the nut method. An AISC Steelwise article from 2015 (The Nuts and Bolts of Nuts and Bolts)...
  7. BMart006

    Weld Repair of HSS Column

    Thanks for all of the responses. The design is a one-off, but can be compared with a hydraulic derrick with some wave action at the base. The area in question is not near the middle so flexural behavior is of no concern. Stresses range from 2ksi T to 22ksi C. After reading the thread KootK...
  8. BMart006

    Weld Repair of HSS Column

    We had considered replacing the deteriorated section with new HSS, but thought that the risk to weld quality was greater than just "filling in" the pitted area and reinforcing somehow. I hadn't considered using a column wrap though, so that may just do the trick.
  9. BMart006

    Weld Repair of HSS Column

    This is part of an articulating structure so I don't think we'd be able to do that on this project. That's a good idea for a common column though.
  10. BMart006

    Weld Repair of HSS Column

    I have a circular HSS column subjected to cyclical compression stresses that has significant corrosion pitting to the extent that the section needs repair for strength reasons. The pitting is limited to a 4" area along the length of the column but is approximately half the depth of the 7/8" wall...
  11. BMart006

    AISC 360-10: Prequalified flare-bevel groove weld symbol clarification

    The dashed line is just indicating that the fillet weld reinforcing is optional (an extension to the prequalified joint configuration). If you desire that weld in your design, it needs to be solid. There are not actually dashed weld symbols.
  12. BMart006

    Switch from management to structural engineering

    I would say that your undergrad was fairly comparable to a degree with a "structural" emphasis since it nearly mimics mine (minus a lab or two and timber). I would also argue that getting your MS/MEng in a top flight civil engineering university is unnecessary because as an employer, any masters...
  13. BMart006

    Earthquake Measures

    How does one determine peak ground accelerations recorded from previous earthquakes (e.g. the Ridgecrest quakes from a few weeks ago)? I'd like to be able to compare actual criteria seen to what structures were designed to (or should have been). I wasn't able to find much more than reported...
  14. BMart006

    Steel pricing index

    Is there a reliable and public source that provides current bulk steel pricing estimates/indexes on a per weight basis or equivalent? We have a situation where contractors will be manufacturing large steel structures for the better part of a decade and would like to be able to adjust the cost of...
  15. BMart006

    Fall Protection Monorail

    In my opinion (and what I was taught) is that the static load of one user (usually 310 lbs in US) should be combined with the 1800 lbs MAF so that should one person fall, the system has sufficient reserve strength for the remaining user. It is possible that the rescue/recovery operation will...
  16. BMart006

    Steel surface preparation with power tools

    I agree. In this case, its that SP2/3 are listed as alternatives with a surface profile of a given range. Perhaps its the selection of which power tools are used that create a surface profile.
  17. BMart006

    Design of Overhead crane hoist

    Depending on the crane type there are a few different design codes you can use. For typical bridge cranes, CMAA 70 (double girder) and CMAA 74 (single girder) exist. Both of these have dead load (minimum 10%) and live load (minimum 15%) factors as a part of the design. Monorails can be designed...
  18. BMart006

    Steel surface preparation with power tools

    I'm reposting this to this forum because I imagine there are quite a few people here with structural fabrication and coating experience. Let's say a paint product data sheet calls for a surface profile of 1-3 mils (range is made up and doesn't actually matter). I know that some power tools...
  19. BMart006

    Power tool (wire brush) surface profile

    I know that some power tools can produce a surface profile in steel such as needle gunning, but is a powered wire brush capable of creating a surface profile? My thought is that it would be creating long canyons, but not necessarily sporadic peaks and valleys similar to what you would see with...
  20. BMart006

    Box Beam Local Buckling

    Thanks, that's what I was suspecting.

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