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  1. David Deck Guy

    Structural Drawings: Starting from scratch

    I am a structural engineer at a design build firm where I have not needed to do any of the drafting, they do not use AutoCAD. I'm starting to get architectural drawings from outside architects that they would like structural markups (I use bluebeam) and calculations for. I would like to make...
  2. David Deck Guy

    ASCE 41 Default Properties for Masonry include strength reduction factors

    I was digging into the commentary on this section and noticed that it makes numerous references to having already applied strength reduction factors. These strength reduction factors are in line with TMS 402 (0.6 unreinforced, 0.9 reinforced). Have I been applying double strength reduction...
  3. David Deck Guy

    SE Exam New format April 2024

    These codes are written in such a legalese, I couldn't imagine referencing them in a timely fashion without my ungodly mess of notes, highlights, and tabs.
  4. David Deck Guy

    SE Exam New format April 2024

    It was a gatekeeping joke. Jokes aside though, I think more states should adopt the SE license. But some sort of PE Structural exam, easier than the SE, harder than the current PE, would be good for niche specialties. I spent a few years working in industrial in my early career where the only...
  5. David Deck Guy

    SE Exam New format April 2024

    So true. I tried to pass the SE exam thinking I could just study the test, the same way I did for the PE exam. Total disaster. It wasn't until working for a different firm where I got much better experience that I was able to pass the test. I've been saying this since the day I passed the...
  6. David Deck Guy

    How hard is PE Civil Structural Exam

    You can pass the PE Civil Structural Exam by studying the test. Get the NCEES practice exam, and keep running the questions until you can do them in your sleep. To pass the PE Structural Exam, you need to know the material, and the amount of material is enormous.
  7. David Deck Guy

    Model Truss Bars as Pins?

    Thank you for the feedback. I'm trying to think outside the box on this one, but don't want to stamp something that stands under ultimate loads but has MASSIVE cracking and serviceability failures. I'll probably explore attaching channels to each side of the beam.
  8. David Deck Guy

    Model Truss Bars as Pins?

    There are beams in the schedule with no stand alone top reinforcement, so I assumed the "bent bars" were to provide bottom reinforcement in the middle, top reinforcement at the ends, and have the bends located at where they anticipated inflection points to be. The issue is that with state of...
  9. David Deck Guy

    Model Truss Bars as Pins?

    To be honest, I was black boxing this a little and chugging it into RAM Concept, but I will look into moment redistribution and see if that allows me to model and consider this RC roof as the original designers considered it.
  10. David Deck Guy

    Model Truss Bars as Pins?

    First, I need to buy an old 1950s textbook on reinforced concrete so I can figure out what sort of design considerations these guys, or women, were making. More immediately important though, I'm having trouble getting a 1950s building to pencil out for some new loads. The beams I'm looking at...
  11. David Deck Guy

    Trying to explain to non-engineers that it may be OVERKILL, but it is NECESSARY

    The line I've been using lately is that its probabilistic, and that while you may be OK with only a 1% chance your structure fails, the city is not OK with 1% of their buildings failing and that we need to follow the law.
  12. David Deck Guy

    Spacing Reduction Factors in Shear Force Perpendicular to Wall at Top of Masonry

    I posed this question to both Dewalt and Hilti. Dewalt told me I didn't need to apply spacing reduction factors and they would clarify their tables in next additions. Hilti gave me more of a boiler plate answer that instructed me to refer to their table but ultimately its up to my engineering...
  13. David Deck Guy

    Shear Flow vs Direct Moment Transfer

    BAretired, I don't like using these aluminum tubes, but they are perforated all over the place for gutter and louver connections. This is one of the manufacture's details.
  14. David Deck Guy

    Shear Flow vs Direct Moment Transfer

    [bugeyed] I think I am there, but just may have been imprecise with my language. If I use the tube-angle built up section to carry the moment, I need the moment connection to connect to both the tubes and the angle. If I want the moment connection to only be between the post and the angle...
  15. David Deck Guy

    Shear Flow vs Direct Moment Transfer

    Eng16080, I think you just made things click for me. With the shear connection between the tubes and the angle, moment is shared. Shared, meaning there is still moment in the tubes that I need to transfer into the post. Thank you everyone else for the input as well.
  16. David Deck Guy

    Shear Flow vs Direct Moment Transfer

    That's a good question. In retrospect, I'll need to beef up the thickness of the angle. In looking at the angle, I am considering ϕMy with 36ksi steel. If I were to consider the angle as the primary load carrying member, discount the tubes, and considering buckling, then the angle would not work.
  17. David Deck Guy

    Shear Flow vs Direct Moment Transfer

    I'm having a difficult time wrapping my head around this. We often have aluminum tubes that connect to steel posts for our pergolas. Given the welding properties (or lack thereof) of aluminum, its been really hard to develop a satisfactory moment connection. One idea recently floated by our...
  18. David Deck Guy

    FRP, Roof Leaking, and Delamination

    If I install some FRP at the bottom of roof beams and slabs, and 30 years from now water starts penetrating the roof and freeze/thawing between the concrete and the FRP, is there a risk of FRP delaminating from the concrete and failing? I have used FRP on a number of projects, but now come to...
  19. David Deck Guy

    Hilti ASD Factor of Safety: 4 vs 5

    I recently picked up "Philosophies of Structural Safety and Reliability" by Vladimir Raizer and Isaac Elishakoff with the hopes there is something in this book I can use to get my points across. We'll see....
  20. David Deck Guy

    Hilti ASD Factor of Safety: 4 vs 5

    If only it were that easy. They always push!

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