Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations SSS148 on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by Greenalleycat

  1. Greenalleycat

    Another how to fix it thread

    All we have to do is get them to build a fully air sealed subfloor Then we can assume that the air will behave like an incompressible fluid as it cannot escape and thus our shear capacity will go through the roof....
  2. Greenalleycat

    Another how to fix it thread

    You learn something new every day - this is why I visit this forum Going to start speccing structural air screws in my future designs
  3. Greenalleycat

    Darn Architects!

    Theoretically looks fine but seems like a sitation for a 4x4 instead? The 2x6 is going to look like shit in a year or two after some sun gets onto it And, as JAE said, second order effects will kick in as it moves with the sun - I can imagine you'll get significant sag in the beam above as the...
  4. Greenalleycat

    Another how to fix it thread

    I agree with Koot Also, laughing at the nice nailing from the floor that completely missed the joist at the top of the photo
  5. Greenalleycat

    Why are neutral axis different when checking ultimate moment and cracked inertia?

    Normally the serviceability condition (in my world anyway) would be done to check whether the concrete section cracks under daily loading The goal of this is to use the full concrete section properties for stiffness In this case, there is a triangular stress-strain distribution above and below...
  6. Greenalleycat

    Foundation Reinforcement

    A picture would tell a thousand words here. If you've got a crack travelling 3 storys down a brick building and into a foundation then I would be very very careful with getting involved and making sure you were certain of what was going on before speccing a repair Are you sure that the issue...
  7. Greenalleycat

    What Hanger to Use?

    That is a fun picture, thanks for sharing
  8. Greenalleycat

    Wood roof purlins with roll blocking on steep glulam trusses: is friction component allowed to resist sliding?

    I don't really understand your issue? Are you worried about the purlins sliding down the truss top chord? I would never account for friction in such a case. Surely by the time you sort your uplift fixing it will resolve the sliding issue easily
  9. Greenalleycat

    Help Calculating Ledger Connection

    I would normally treat that detail as pinned so you'd have a simply supported beam between the post and the ledger However, the devil is in the detail with this You are presumably putting this ledger up against your cladding and bolting through which: 1) potentially compromises your...
  10. Greenalleycat

    How to fix this?

    Your perspective is off. It is not "punishment". They had control of their actions. They did it wrong. We do not have to accept it and I would not be putting my name against that workmanship. They had their choices, and we have ours. Evidently you and I would make different choices in this...
  11. Greenalleycat

    How to fix this?

    For one thing, you and I and everyone on this forum knows that, if this is how they build a joist hanger, the rest of the work will be equally shoddy, especially once you let them off the hook with this In my experience, if you give an inch, the contractor takes a mile You compromise to help...
  12. Greenalleycat

    How to fix this?

    I just don't think load testing is the right solution for this problem The contractor is in breach of contract presumably (as this will not be an acceptable construction in any drawings or specification) It is clearly not what is drawn and is less reliable than the original design even if it...
  13. Greenalleycat

    How to fix this?

    Contractors are professionals who are paid good money to do things properly and as per the plans We are not here to find ways to justify their shit construction These problems are usually best solved by telling the contractor to pull it down and do it again properly At worst, you provide a solid...
  14. Greenalleycat

    Are joist chords analyzed as continuous or pinned at panel points?

    More or less the same I'm sure In my software, SpaceGass, I can get zero moment nodes easily enough but it's all done via 'making the end of each member not transfer any moment' to use your lingo However, if I make all members at one node 'not transfer' moment then it will throw a hissy fit and...
  15. Greenalleycat

    How to fix this?

    I'm baffled by all the engineers finding ways to defend this shit house construction (shit house is both a general slang for something really shit, and a literal description of the construction of this house)

Part and Inventory Search