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  • Users: frv
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  1. frv

    AISC 14th vs 13th edition

    To add to what Josh already mentioned, there are some changes in the connection design that add a bit of capacity to connections. I don't think it's huge, but it may be worth a glance.
  2. frv

    StruCalc vs. EnerCalc

    I used to love EnerCalc for being very simple and easy to use, especially for relatively simple things. However, in my experience, Enercalc has become almost unusable in the last few years. It crashes ALL the time and there are constant upgrades that only destabilize it further. Perhaps I have a...
  3. frv

    structural analysis software

    I'll vote for RAM Elements as well. It is pretty powerful and flexible and has some useful built-in modules that simplify some common analyses. You can also customize it fairly easily. I don't have any objection to RISA; it just seems a bit more "black box" than Elements (though that really may...
  4. frv

    sizing of reinforcement question

    I've never actually used it, so I don't have any insight, but you may be able to design it as Structural Plain Concrete (Chapter 22).
  5. frv

    Hand rail and post design for metal stairs.

    nutte is absolutely right. In fact, AISC has been indirectly using what you refer to as "plastic design" for quite some time. It was just buried as an increase in the allowable stress. Actual "Plastic Design", as nutte, pointed out, is something entirely different. It's a way to take advantage...
  6. frv

    Hanger Stirrups in Beam-to-Girder Joints

    What you are referencing, I believe, is "Hanger" reinforcement. It is not covered in the code, but should be. Check out MacGregor for more information. He actually provides design guidance.
  7. frv

    2" non-structural topping mix

    Roughened surface is what I've seen.
  8. frv

    IBC 1605.3.1 Exception 2 vs. ASCE 7

    I'm not entirely sure what you just asked.
  9. frv

    Enercalc Wind Calc Module ASCE 7-10 - PROBLEMS

    Chris, I used to like Enercalc, but it's getting to the point where it's unusable. I don't know if you tried to cram too much into the program, but as soon as you get a few calculations in, it takes way too long to do anything, and there are the inaccuracies brought up earlier. I used to use...
  10. frv

    Enercalc Wind Calc Module ASCE 7-10 - PROBLEMS

    I used to like Enercalc for simple clacs, but I try to avoid it now. It seems to be riddled with inaccuracies. And non-stop updates.
  11. frv

    IBC 1605.3.1 Exception 2 vs. ASCE 7

    It is in ASCE. See Section 12.7.2 (4).
  12. frv

    Twisted high-rise

    Yeah, m^2, I gotta agree with Rarebug on this one. There was an enormous amount of redundancy in the twin towers. Otherwise, they would have collapsed upon impact after, you know, there was a two-story hole in the building. Yet there they stood valiantly until the fire overwhelmed the interior...
  13. frv

    Who "owns" the factor of safety?

    I've seen that done before, and I think it's a mistake. You can't take the concrete cylinder test results and use that value directly. If you want to base your design based only on the tests performed on the samples of the in-situ concrete you'd have to use the provisions of 5.3.2.2 (assuming...
  14. frv

    Miscellaneous Metals

    OK.
  15. frv

    Does overdimensioning of wall and roof construction help to get the building approved nationwide?

    What if you locate your house on South Padre Island? The answer is (almost) certainly not, unless you design your house for the seismic forces in Wyoming, the hurricane winds of coastal Texas and the horrible soils of east Texas.
  16. frv

    Aren't virtually all columns eccentrically loaded?

    CDayton. Yes. If the beam is welded to the column, you'd still get a parabolic shape for the moment, with the ends of the diagram shifted down below the "x" axis". But,as mentioned above, the beam does, to a small extent, introduce a moment into the column even if it is simply supported. The...
  17. frv

    Please Enlighten Me Here...

    JStephen. I don't think that's the point of the map. I think the point of the map is to determine the wind speed for design of an emergency shelter. I don't think anybody is advocating building bunkers. If the homeowner/business owner chooses to build a small emergency shelter, then that is the...
  18. frv

    ASCE 7-10 wind loads

    Hmm. I'm not sure I follow. The process to get to the final result (i.e., calculation of q, determination of Kz, kzt, G, Cp, GCpi, etc.) is essentially unchanged, other than the number in is higher and the factor is lower. I don't see how this would change your calculations other than perhaps...
  19. frv

    ASCE 7-10 wind loads

    AELLC, Again, the newest ASCE wind load provisions didn't really change from a procedure standpoint. The wind loads are calculated essentially the same way as they had been the last 10 years. They are now simply organized in a more logical way, with some "big picture" guidance at the beginning...
  20. frv

    ASCE 7-10 wind loads

    keepitsimple, I completely agree with you about the code complexity issue. I've often argued that we're getting very limited ROI in the codes. It now takes twice as long to design something (for a net savings of 5% in material), as it did not too long ago, and the competition for work is...

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