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RE: ENGINEERING 101_8: STEEL STRENGTHS
Hello @motoengineer. What about the lowest value to avoid any chance of failure. As an ex machinery mover, I know those supports take a lot of weight at times. If they fail, people get hurt. Unless you were able to match samples to i-beams and use them in specific places. Then that begs the question: did you send in multiple samples from each piece and get different results? Are the samples representative of the entire length of i-beam?
Good stuff. I-beams come in real handy for riggers and heavy equipment movers.
Geoff.
These samples were taken as one piece from different places across the building. These were taken at the end of the beam where the flexural stresses were near zero. We chose based on ease of access because we had limited areas where we could sample. I recorded where I took the sample from within the building, but there wasn't enough of a variation to make any definitive assumptions.
If you take the lowest value, you will absolutely avoid your chance of failure in terms of steel flexural overstress.
This would be the most practical choice, but it is also the most expensive! We went this route and need to reinforced more than 50% of the beams we were loading as a result of the modification to the building.
Yes it's more expensive. That can relate to topics like offshore tankers and oil rigs that don't get the neccessary care due to extra cost. There's no telling the cost down the road should an accident occur, and there's never a way to put a number on the loss of a life. Glad to hear you're choosing the responsible route. :)