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  1. dik

    ASR

    Thanks...
  2. dik

    ASR

    Thanks, gentlemen (a binary term for PC).
  3. dik

    ASR

    I've encountered ASR in concrete mostly with slabs. The effect is mostly cosmetic. If surficial ASR is evident on a large pile cap, does it have an impact on the overall strength or seriviceablilty of the pilecap? Thanks...
  4. dik

    Things are Starting to Heat Up - Part XIV

    Nope... but other than our cold climate issues, it's likely very small. I don't drive and whenever I go out, I usually use public transit. I don't run an air conditioner. I usually eat veggies and almost no beef... chicken and fish, mostly.
  5. dik

    Things are Starting to Heat Up - Part XIV

    It's a Chinese form of socialism... and is working very well. In the last 75 years they have gone from one of the poorest countries in the world to one of the top. Their retirement age is "China's current retirement age is 60 for men, 55 for women in white-collar jobs, and 50 for...
  6. dik

    Things are Starting to Heat Up - Part XIV

    You might want to look in a mirror... for its treatment of Covid and the recent Texas flood... the US may be in line for the new Darwin Award.
  7. dik

    Things are Starting to Heat Up - Part XIV

    I would suggest that China is far more industrialised than the US is. For profit, most companies took jobs from the US and moved them east.
  8. dik

    Typical Details

    I often have 2 and sometimes 3... I live by drawing notes in lieu of specifications. Too often I've encountered old drawings where the specs are missing. On one major project in Winnipeg, the specs were inadvertently excluded from the Contract Set; the general notes saved the day. It was my...
  9. dik

    Things are Starting to Heat Up - Part XIV

    On a per capita basis, their carbon footprint is about 1.5 less than the US (the US is #1 for countries greater than 100M population) and China is manufacturing nearly everything. The US has a higher per capita footprint and they produce nearly nothing. The recent Texas flooding is a consequence.
  10. dik

    Things are Starting to Heat Up - Part XIV

    They are putting the rest of the world to shame in nearly everything.
  11. dik

    Things are Starting to Heat Up - Part XIV

    Copernicus... https://www.copernicus.eu/en/news/news/observer-eumetsat-expands-its-contribution-copernicus-through-five-new-satellite-missions
  12. dik

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

    I've only ever had employers...
  13. dik

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

    When you get into practice, you will find that you would retain the restraints for legal reasons, even if not necessary. If an owner/client wants you to do something that has no negative effect if it was removed... it stays. Should a failure occur, even for another reason, you would have no...
  14. dik

    Typical Details

    I had two different types of standard details... the ones that showed information like a stepped down footing. It could be applied to a drawing without modification. The other type of standard detail might be a drawing sheet with an 'L' shaped stiffened slab foundation for a house. This would...
  15. dik

    Wind Load

    I used 0.5 as originally planned... the equivalent to a fairly 'dense' chainlink fence. I would suggest the porosity was approaching about 90%. The structure is low to the ground and is fairly sheltered. The steel components are not in a dense pattern. Also did not use 0.85 x DL for...
  16. dik

    Wind Load

    Closure on this... I've designed this with a reduced wind load based on an equivalent chain like fence resistance and I've used a 1/10 year return period wind load. I've designed the components for the full wind loading. I've picked up another reference... ASCE 10... Design of Lattice Steel...
  17. dik

    Concrete exposed to both chlorides and sulphates

    They are two different processes... The sulphate cause the formation on Etringite or gypsum which is expansive and causes the deterioration of the concrete.
  18. dik

    Concrete exposed to both chlorides and sulphates

    Unless you have a lot of slab, I'd err on the conservative side. I'd go for and HS or HSb mix with a 30 or 35 MPa strength. Check with the geotekkie...
  19. dik

    Things are Starting to Heat Up - Part XIV

    You must have provided a lot of help to China... they are leading the pack with about 40,000 miles of it.
  20. dik

    Things are Starting to Heat Up - Part XIV

    It's in operation... maybe Santa Cruz Metro should consult with them? The US seems to have problems with high speed trains, too.

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