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  1. DanKile

    bARN WALL GIRT DEFLECTION

    IBC table 1604.3 has a column for Snow or Wind. Also the notes of that table are important. Note 'a' has L/60 for metal panels and L/90 for secondary wall members supporting metal panel. Note 'f' lets you use a reduction factor or the 10-year MRI maps for deflection.
  2. DanKile

    New foundation encroaching on existing

    I guess the problem pile is the rotated square at section 17. Some ideas in probably increasing difficulty: 1. Design the spread footing for the extra load of the existing deck. 2. Check the existing pile for possible additional load from the spread footing. 3. Expand your scope to redesign the...
  3. DanKile

    ASCE 7-16 Wind Loads

    Partially Open would go with provisions applicable to Enclosed. ASCE probably added Partially Open late in the cycle and didn't add it everywhere it should have been. In 7-22 they fixed this oversight.
  4. DanKile

    Chapter 28, ASCE 7, Wind loads at corner

    The "Guide to the Use of the Wind Load Provisions of ASCE 7" has an example of a U-shaped building. It notes that L-shaped buildings are not specifically covered by chapter 28 and outside the scope of research for the "pseudo pressures" of chapter 28. It recommends using chapter 27 for L-shaped...
  5. DanKile

    Coaxiality tolerance for the welded structures

    As JStephen says, it depends on the application. Is it a building structure, a piping structure, a jet engine structure, etc? These all can use the same shape of components but have very different tolerances. In my field (building structures), we fabricate to 1/8" (about 3mm) of tolerance. I...
  6. DanKile

    Residential- Curved Stud Walls

    I have seen it used on a roof of a porch, because the "slope" was curved.
  7. DanKile

    Residential- Curved Stud Walls

    They do make bendable plywood (one example). I don't know if it would work for this application. I have only seen its use vicariously.
  8. DanKile

    ASCE 7-16 Figure 30.5-1

    The "Guide to the Use of the Wind Load Provisions of ASCE7-02" has the formulas. Newer version should have it as well. They are in the same form as the other formulas ( constant + coefficient * log( area ) ).
  9. DanKile

    Wood post Cracks

    It is probably a coincidence that the checks on the middle column (picture 4) align with the inside edge of the support beam. Could what little load has actually been applied compress the column unevenly and expand the existing checks?
  10. DanKile

    Need Help/ Opinion of Classification of Structure (Porch Addition) Based on ASCE 7-10 or ASCE7-16

    It won't change the results for this one, but may trip you up in the future. The enclosed check appears to follow check 2a. It should be the opposite of check 2a, since the enclosed check should be less than minimum opening size.
  11. DanKile

    Need Help/ Opinion of Classification of Structure (Porch Addition) Based on ASCE 7-10 or ASCE7-16

    Just looking at the screenshot, you have the mislabeled values for Aoi and Agi, which might cause some confusion. Aoi is the sum of the openings in all the other surfaces. Agi is the sum of all the other surfaces areas. Your 2a check has the comparison the wrong way. Surface opening greater...
  12. DanKile

    Need Help/ Opinion of Classification of Structure (Porch Addition) Based on ASCE 7-10 or ASCE7-16

    With buildings that are open on three sides it depends on the geometry of the building whether it will be "partially enclosed" or "partially open" and I just have to calc it.
  13. DanKile

    Need Help/ Opinion of Classification of Structure (Porch Addition) Based on ASCE 7-10 or ASCE7-16

    "Open" and "Partially Enclosed" have used the same formula for a very long time. So "open" in 7-10 and 7-16 are the same. Before 7-16 "Enclosed" was the catch all enclosure classification. This was a point of confusion for many (How is this building enclosed when I can see though it?). In...
  14. DanKile

    Need Help/ Opinion of Classification of Structure (Porch Addition) Based on ASCE 7-10 or ASCE7-16

    It only takes one wall to make the building partially enclosed.
  15. DanKile

    Need Help/ Opinion of Classification of Structure (Porch Addition) Based on ASCE 7-10 or ASCE7-16

    Exposure is done based on each cardinal direction. Enclosure is done based on building surface area. You should find a copy of "Guide to the Use of the Wind Load Provisions of ASCE 7" to be highly informative. Just looking at that porch says its partially enclosed.
  16. DanKile

    Double-Sided End-Plate Bolt Sharing

    It is section 1926.756(c)(1) in OSHA 1926 Construction. Skimming through AISC 341, it does not appear that there is any additional requirements for this joint. You should review this for your self to see if there is something applicable.
  17. DanKile

    Double-Sided End-Plate Bolt Sharing

    They can share bolts, but you need to provide at least one unshared bolt, possibly for each beam. This is so the weight of the beam can temporarily hang from the one bolt until the other beam can be installed. In the USA this is covered in OSHA.
  18. DanKile

    Lateral wind loading on open carport frame (ASCE 7-16)

    1. Use a weighted average of the total areas. This was done in one of the studies that this code is based on. 2. I'm fairly sure that chapter 29 does not apply in this case.
  19. DanKile

    Strap bracing for roof purlin

    I've only using this strapping going straight from flange to flange (not crossing). Its a lot easier for the erector to not have to weave the strapping through the purlins. You could calc the purlins with one flange attached to panel and not have the strapping at all. That B-deck will be...
  20. DanKile

    Zee purlin fixity

    LGSI sections are pretty much the standard that you would get when ordering ZEE sections. These come with one flange about 1/4" wider than the other to allow lapping. The MBMA design guide will still be useful even if you are not designing a metal building. It will have examples on how to...

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