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  1. ryaneng

    Eccentricity On Walls Transfer to Footings

    Put a bigger footing under the bigger load. Have you considered if an intermodal container can support 31 trusses weight?
  2. ryaneng

    Working on unpermitted work that should be permitted

    From my limited knowledge of law, I think these types of clauses only really significantly help you if you attempt to enforce them throughout the process. If you have that clause in there but then have no problem interacting with a DIY builder and providing site visits and construction feedback...
  3. ryaneng

    Slab on grade or structural slab?

    Forgive my naivety, but are you suggesting that you're designing a 12x24 column for 56kips/0.02 = 2800 kips? Or is that the resultant force you would have in your slab from the combination of a few columns?
  4. ryaneng

    Drawbacks to reducing number of exterior plywood shearwalls

    Not really any drawbacks to this, except for the fact that it may not actually decrease the cost. Typically what I would do on a design like this is determine the total load along a resisting line, then see if this load can be resisted by the total strength of the unblocked wall segments (this...
  5. ryaneng

    100+ year old residential timber analysis & reinforcement

    Not to get off topic, but why do you think this is such a mistake? I bought my house without a home inspection, and have no regrets. Most of the home inspection reports I have read haven't provided much more context to the condition of a house than a thorough walk-through would provide.
  6. ryaneng

    what would be the easiest way to measure overhead crane deflection during load test

    Could you measure the deflection 8' away from your load, so that the load isn't obstructing your laser sights? Alternatively, could you measure the difference in hoist line position relative to the top of load at a specified height above the ground? This would incorporate the tower rotation...
  7. ryaneng

    Minimum Extensions for Reinforcement in Two-Way slabs - Epoxy Bars

    That is an interesting question. I'm going to suggest that the lengths would not need to be increased due to the epoxy coating. My logic for that is that if you work from the tip backwards, the bar is still extending past the inflection point, and begins developing at it's tip. Whether it is...
  8. ryaneng

    Lapping of bars of different quantities

    I think a quick sketch would help. Top bars in a 2 span simple beam? I would only expect top bars to technically be needed over the center support, though maybe I would run them continuous depending on different parameters.
  9. ryaneng

    Shear flow question

    Flip it upside down and pretend you are adding the wide flange to the bottom of a WT. The shear flow is the same.
  10. ryaneng

    Retaining Footing - New on top of Existing

    There's some concerns here in my opinion: 1. Top bars in your footing are not developed. 2. Stem could need to be thicker for this wall height. 3. Check reinforcing design (same bar size and spacing in wall and footing yet the wall has a d=5" and footing has d=13") 4. Vertical bars are hooked...
  11. ryaneng

    Restraint vs Tie-off

    I know you mention OSHA, but then you also mention Canadian requirements... Here is a link the WorkSafe BC requirements for cable guards: https://www.worksafebc.com/en/law-policy/occupational-health-safety/searchable-ohs-regulation/ohs-regulation/part-04-general-conditions#schedule4A In short...
  12. ryaneng

    Floor Joist and Beam Uplifts at Three-Point Bearing

    As far as the beam goes, I think you have two options: 1. Run a design with the beam cantilevering past support 2, then increase the beam depth until you have sufficient stiffness and the upwards tip deflection is reduced to a point you're comfortable with. 2. Cut the beam at support two and...
  13. ryaneng

    Special loads on trusses

    I've always done this. It's a nice fail safe in case you have any localized failure of your roof sheathing, then you know your bottom chord can take the snow load.
  14. ryaneng

    Propped Retaining Wall Sliding?

    I would think you need to design this for the condition that the tank is empty, and because it's not tied from side to side you would have a major sliding problem. I have not designed a cesspit, but we've done similar for stormwater infiltration tanks. In that case we place a footing tie...
  15. ryaneng

    Flitch plates for wood balcony cantilever beams

    An interesting use case for flitch plates. I don't think you need to consider the rules of thumb for cantilever and backspan ratios as much as you need to resolve the moment from the flitch plates into the existing LVL beam and be satisfied that the connection forces you are imposing on the LVL...
  16. ryaneng

    NBCC Foundations Allowable Stress Wind load combo

    I'm getting the sense that there is a bit of a misunderstanding here. In the geotech reports I receive, we often are given a SLS and ULS bearing capacity. Both of these have factors applied to them as far as I am aware, but this is done on the geo side and we are just presented with the final...
  17. ryaneng

    Farm Building Code - Tower Silos Vs. Storage of Grains

    @jayrod12, I didn't mean any disrespect, just wanted to clarify that it is apparently still in effect. I agree that the age of it gives me pause, but we have used it on a number of projects, and I would tend to agree with TLHS that it's likely survivorship bias that is bringing the younger...
  18. ryaneng

    Farm Building Code - Tower Silos Vs. Storage of Grains

    I believe you would have to investigate both conditions to determine which governs for your silo. In Appendix A, A-2.2.1.14.(1) says this: Maximum lateral pressures on walls are produced by small values of (mu), which occur with very dry grain. Maximum friction loads on the walls are produced by...
  19. ryaneng

    Snow Drift Analysis

    Then wherever you have higher loads use a schematic similar to Dik's and show the higher load goes to the point where it applies. Or, if the loading isn't that much higher, just apply the higher load around the entire pop up roof for simplicity.
  20. ryaneng

    Serbian bridge

    When I zoom in on the picture that you uploaded, this is what I see: We don't all have the high quality original. I'm still confused if there was a question?
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