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  1. ChorasDen

    Ponding Load

    ...using the mean stiffness value to calculate deflection, or should we follow Appendix F of the NDS and use a 5th percentile stiffness value for the member? For reference, that takes a #1 Southern Pine from an modulus of 1.6*10^6 psi to a value of 0.94*10^6 psi. That'll really affect your...
  2. ChorasDen

    Distributing or not to distribute concentrated live load per ASCE 7

    and continuing, 2.5ft square is probably a committee decided number that seems appropriate for a load sharing area.
  3. ChorasDen

    Distributing or not to distribute concentrated live load per ASCE 7

    While we do not typically consider the composite effects between wood members and the diaphragm for strength based load sharing, with the single exception of SPDWS section 3.1.1.1, I generally consider it a rational approach to use the 2.5ft area for consideration of point loads. The best way to...
  4. ChorasDen

    Ponding Load

    Hate to pile on, but I can order and ship 60ft+ long wood trusses or engineered wood products very easily. With lead time, we can get those made to 100ft or more (shipping & manufacturing a single piece being the biggest challenge). Ponding is a universal concern, regardless of material.
  5. ChorasDen

    Ponding Load

    🤣
  6. ChorasDen

    Ponding Load

    I agree about the process acting iteratively, luckily, in my experience the solution converges quite quickly, so there is not much difficulty in determining. AISC applies to steel buildings, but the section that Lex posted looks to be from ASCE7, which applies to pretty much all buildings we...
  7. ChorasDen

    Carlson Hydrology Module vs HydroCAD Results

    So what happened to this part of the OP? What actions, if any, have you taken as the municipal engineer to discuss with the original design engineer that they are submitting work outside their area of expertise/competency? I'm dealing with a very similar situation at the moment.
  8. ChorasDen

    Ponding Load

    8.2 states that "each portion of roof shall be designed to sustain the load of all rainwater that will accumulate on it, assuming all drainage systems that meet any of the following criteria are blocked", I read that as accounting for ponding effects, the curious part is it doesn't explicitly...
  9. ChorasDen

    Manager Says Keep the Restraints — I Think They’re Unnecessary. Who’s Right?

    @Greenalleycat Ah, I did not realize the column was tube steel, I assume it was a wide flange similar to the restraint beam. I do very little (otherwise known as none) steel design, how are the restraint beams actually restraining the column here? They look like they may be 20ft clear, with who...
  10. ChorasDen

    Manager Says Keep the Restraints — I Think They’re Unnecessary. Who’s Right?

    I don't understand the purpose of these restraints, can anyone enlighten me? They appear to be long and relatively slender in the render, are they preventing the development of a buckling shape within the column by acting as tension/compression elements to restrain the column?
  11. ChorasDen

    Anchoring scissor car hoist/lift

    Try posting this in the structural engineer general forum, you may get more answers.
  12. ChorasDen

    Residential- Curved Stud Walls

    What is the curve radius? I agree with Pham's comments, but if the radius is large enough, you may be able to get away with avoiding kerfing. I would be concerned with kerfing due to unbraced lengths of the studs, full wall width blocking at 12" intervals would be required if you go that route...
  13. ChorasDen

    Crushing of WSP 2

    What precisely is the question that you are asking here? Fcperp is a unique attribute of wood that has values assigned based on a proportional limit approach. This differs from the approach used for other properties (fcparallel, Fb, Fv, etc). Be aware that OSB does not typically have uniform...
  14. ChorasDen

    Another how to fix it thread

    maybe this is only a west coast concern, but what exactly is the developed diaphragm capacity of a 23/32" subfloor panel nailed to air?
  15. ChorasDen

    Python programming assistance needed

    So I'm curious, what have you tried at this point in time? Sounds like you're doing some fishing for answers which can be a good exercise sometimes. I have no experience with Python integration with outlook's desktop application. Is it possible? Maybe, hard to say. How will you ensure the email...
  16. ChorasDen

    Foundation Reinforcement

    What calculations have you performed to check the plate? You're asking us if the plate thickness is sufficient, but how have you confirmed that yourself?
  17. ChorasDen

    Help Calculating Ledger Connection

    I read the plan check comments more as pointing to needed seismic anchorage back into the structure, rather than checking for withdrawal of the fasteners into the ledger. Did you provide connections for the deck back into the main structure, or did you design them as separate structures, and...
  18. ChorasDen

    How to fix this?

    Thanks for asking, I use a pallet jack. Don't want to get too crazing with loading on the floor. We don't typically do much cooking, so we park it next to the kitchen island. I'm told that's the strongest place in any house.
  19. ChorasDen

    How to fix this?

    I typically store my hot tub inside the house during the winter, I usually conserve the water and don't drain the tub.
  20. ChorasDen

    Truss Reactions

    Throwing my hat in here, I always just ratio the given reaction. Is it a perfect solution? No, but it's close enough to satisfy me. If a reaction is give as 1387lbs, and the design loading overtop is 15psf TC DL, 5psf BC DL, 20 RL, 35 SL, I'll just assume a worst-case load combo (DL + SL) and...

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