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  1. youngstructural

    Doing my own testing

    Fortunately for PostFrameSE the Pub is digital. ;0) B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand) Working in Canada, and missing my adoptive New Zealand family... at least I brought the little Kiwi with me!
  2. youngstructural

    Doing my own testing

    Nice line BA... Quasi-religious, and quite poetic. I like it very much. YS B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand) Working in Canada, and missing my adoptive New Zealand family... at least I brought the little Kiwi with me!
  3. youngstructural

    Age of Concrete

    Not that I have ever heard... As I understand it the problem is too complex to be accurate without knowing more ahead of time. Why do you need to tell the age of a sample? If you don't know the age, you likely don't know the curing, which likely as not means it does not match what is in the...
  4. youngstructural

    Rivetted half thorugh bridge deck plate girders

    I've had a middle of the night, wake up in a cold sweat moment... And it's not even one of my projects! I just need to point out that my list of common rivet sizes has omitted THE most common bridge rivet size; 7/8", AND I've also incorrectly listed 1" as a common size! The 1" diameter rivet...
  5. youngstructural

    Loose gusset plates...

    I would really like to see photos as well, if at all possible... Cheers, YS B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand) Working in Canada, and missing my adoptive New Zealand family... at least I brought the little Kiwi with me!
  6. youngstructural

    Loose gusset plates...

    I was reading through all the posts, with exactly dicksewerrat's thought in mind: These bolts were almost certainly not installed correctly.... IF you can get a nut properly onto the end in this situation you can normally slowly bring the plates together simply by tightening each bolt...
  7. youngstructural

    Bridge Design to BS 5400

    I agree with DSB123; We are a profession that demands self-restraint while working towards professional knowledge and skill enhancement. I believe your best course of action would be to employ/cooperate with a (much) more local engineer experienced in the work you are planning to undertake...
  8. youngstructural

    Posts Embedded in Concrete

    csd72: Not talking about into soil... Did you misunderstand or am I in line to learn something new here? Looking forward to your reply, YS B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand) Working in Canada, and missing my adoptive New Zealand family... at least I brought...
  9. youngstructural

    Posts Embedded in Concrete

    A post in concrete is only like a post in soil in appearance, at least in my opinion. The soil will yield plastically and the loads are reasonably distributed; Your concrete is not going to yield, it will crack. You need to consider the problem elastically. Those nice smooth semi-circular and...
  10. youngstructural

    Rivetted half thorugh bridge deck plate girders

    I thought I might chime in with one more point: Much like our modern steel member tables, you'll find that old rivet tables list a very great number of sizes (something like everything between 1/4 and 1-1/16" in 1/16" increment, however these were not commonly available. The most popular sizes...
  11. youngstructural

    Rivetted half thorugh bridge deck plate girders

    In many cases rivets were placed at close spacing for the following reasons (not always obvious to the uninitiated): 1. It was shown in the 1890s that spacing of rivets less than 6" would reduce (and at 4" - Your spacing - nearly always prevent) rust jacking. 2. The designers typically...
  12. youngstructural

    Rivetted half thorugh bridge deck plate girders

    Mostly for my own curiosity: You need to be certain that you really WANT rivets. I've seen an engineer struggle to do a design with rivets in a desire to be "sympathetic" to the existing structure, only to find that no contractor would (or I've sometimes thought even could!) undertake the...
  13. youngstructural

    Wood Stud Wall Capacities

    There are a number of these tables available through the Canadian Wood Council. I'm certain the APA will have produced similar ones... I presume you're looking for something in the US? YS B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand) Working in Canada, and missing my...
  14. youngstructural

    1920's lime and gravel foundation

    Sorry about that, I didn't catch that the whole foundation was thought to be this early agg/lime mix... I have seen thin base layers (failing similarly to your's) of say 150 to 300 cement-like material below a spread brick foundation. These are notoriously (in my own mind) difficult to...
  15. youngstructural

    1920's lime and gravel foundation

    You will have future problems if your motar is too stiff. I am not aware of any fundamental chemical reaction occuring to cause deterioration between cement and lime mixes... That doesn't mean there aren't any! Okay, so you need your new mortar to creep. I would suggest looking into a mix...
  16. youngstructural

    CONCRETE STRENGTH

    Very strange. You could certainly make this argument in a seismic environment, where your overstrengths dictate plastic hinge formation (to some extent, less than steel), however otherwise I'm going to be interested to see any justification(s) for typical construction. What about admixtures...
  17. youngstructural

    CRFP concrete column jacketing

    Just make sure you specify your minimum requirements... Most manufacturers have more than one product, often with widely differing material properties. And your design is completely dependant upon the material properties (of course). I don't know the documents you'll be working with, however...
  18. youngstructural

    CRFP concrete column jacketing

    Canada has a published Fibre design code: CAN/CSA-S806 I find it very useful, and it is quite important that you really study this material before you begin. The fundamental design philosophy is quite different from normal reinforced concrete. Further, the lack of stirrups in your column...
  19. youngstructural

    Stability of pre-tied bridge column steel

    I don't envy your situation, but I would guarentee you I would not do what you are saying they've suggested. That sounds like an OSH nightmare to me, and just begging for trouble! You might want to try and make an argument for your procedure based on CP-230. This is a document talking about...
  20. youngstructural

    Anyway to Avoid Flood Vents in Flood-Prone Area?

    Or base the house on deep piles. I've seen this done in New Zealand frequently to enable building on liquifiable grounds... Essentially, in an Earthquake, the earth turns to liquid and the foundations must be able to take this material change. I've seen 150x150mm concrete piles go 9 to 15m...

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