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  1. COEngineeer

    Soil Factored Resistance? LRFD

    So I received a soil report and this is the recommendations they wrote: "Based upon bearing capacity calculations, we recommend a Factored Resistance (Rr) of 2900 psf for 3' wide footing, 320 psf for 4' wide footing and 3500 psf for 5' wide footing could be used for the proposed footing design...
  2. COEngineeer

    Pile cap with lateral

    I am designing a pile cap that will bridge a series of 12" dia. drilled piers that support a 3 sided culvert. If I have a horizontal reaction from the structure, can you resist this horizontal reaction with the passive pressure againts the pile cap? Or do I need to make sure the piers can take...
  3. COEngineeer

    foundation design

    This is what the soil report says: "We have performed Bearing Capacity Analyses for these footings, and based on these analyses, and engineering judgment, we recommend a Factored Bearing Resistance of 1450 PSF." What does this mean? Sorry, I usually deal with Allowable Bearing Pressure and I...
  4. COEngineeer

    There is hope!

    So I was laid off back in November. I just heard today that I got an offer! They are matching what I was making previously. It looks like the economy is getting better. I thought I will be unemployed for a while. Anyway, you will see me active on this forum again. I will be designing a lot...
  5. COEngineeer

    Table 10-9 single plate connections

    Does anyone know why the value goes up quite a bit between 3rd edition and 13th edition LRFD for shear tab connection? Some goes up 40%! Never, but never question engineer's judgement
  6. COEngineeer

    Ram connection calc. references

    I am trying to verify results I got from Ram Connection. Under the report, it is giving me references under each results they got. Most of them are J... which is spec. from the steel construction manual. But they also have T7,T8, P9-6, P9-7. Do you know what they are? Never, but never...
  7. COEngineeer

    LA California wind load

    on CBC wind map it is showing that LA is in special wind region. Can someone tell me what the wind load is? I searched their website and cant find anything. I was on hold forever and had to hang up because I had to go somewhere. Anyone? Never, but never question engineer's judgement
  8. COEngineeer

    Texas Instrument user

    Is there a way to do feet and inches addition on TI-85? I hate adding all of the inches first, divide it by 12, then add all of the feet to get the sum in feet decimal. There is got to be a way to do it easier on the calculator and get the result in feet and inches. Anyone? Never, but...
  9. COEngineeer

    AISC bolted connection question.

    Section J3.10 Bearing Strength at Bolt Holes (13th ed.) When is deformation at the bolt holes at service load design consideration? What type of situation dont you consider it? Also, how did they come up with equation J3-6a b and c? Thanks! Never, but never question engineer's judgement
  10. COEngineeer

    Keeping track factored and unfactored

    Usually I feel that it is very hard to keep track load factored and unfactored load. You will need unfactored load for shear diaphragm for steel deck, soil bearing foundation, etc. Then you need factored load for your steel and concrete design. On the top of that, you have so many load...
  11. COEngineeer

    Shear breakout on Appendix D

    It seems to me when your bolt is far from the bottom edge, your shear breakout calculation is not making any sense (i.e. embed on the top of basement wall). I was expecting concrete pry-out controls most of it but it is not. Is there something wrong with the formula? There are scenarios where...
  12. COEngineeer

    How do you do lateral design on this?

    http://www.cnn.com/2008/WORLD/meast/06/25/duibai.tower/index.html Never, but never question engineer's judgement
  13. COEngineeer

    stamping your own house

    Lets say you are in a process of building your own house. Would it be ok to stamp your own house? What if I dont have e&o? What happen if in 3 years I decide to sell it? Is it too risky to stamp it even if it is your own house without insurance? Never, but never question engineer's judgement
  14. COEngineeer

    obtaining value every 10th rows

    Lets say Column A I have a column full of data (lets say 100 data). What formula do I need to put on B so I can easily drag it down to however many row so that it will obtain A10,A20,A30...,A100. ? Am I making any sense? I dont want to type in =A10, =A20 .... etc. manually. Never, but never...
  15. COEngineeer

    wind design

    OK, lets say you have 40'x40'x60' tall building. On the top of building you have parapet that is 30'x20'x15' tall. So, when I design the components and cladding on the parapet, what is a? (10% of least horizontal dimension). Is it the 40' or 20'? P.S. Why is that all of the examples are...
  16. COEngineeer

    Cantilever Retaining wall schedule

    Sometimes we have so many retaining walls on one project so we do a schedule so we don't have many details. So usually we just put rebar for shrinkage and temperature for the horizontal bar on the wall. My question is, a lot of the retaining walls jogs. Don't you think the horizontal rebar...
  17. COEngineeer

    Steel X-section properties on AISC

    I was wondering how AISC rounded their numbers from decimal to fraction to 1/8" increment? I am trying to set up an excel spreadsheet to help with steel shop drawing process. I linked the spreadsheet to Steel x-section property table provided by AISC (depth, web thickness, flange width etc.)...
  18. COEngineeer

    Firms not practicing "equal oppurtunity"

    Ok, so I sent my resume to this one company a few days ago. I think I match the experience they need pretty good. I dont know what happened, but the person that received the email mistakenly replied/forwarded the email to me and said (direct quote) "Not sure, he looks pretty foreign, but has...
  19. COEngineeer

    13th edition AISC

    Right now I only have 3rd edition LRFD. Do you think it is worth the money for me to join ICC and buy the 13th edition? Will cost me over $300. What do you think? Never, but never question engineer's judgement
  20. COEngineeer

    help with wind loading

    Lets say you have a gable roof supported with only 1 wall and the rest with columns(and knee brace for fixity). The roof is supported by trusses that sit on a shoulder beam on the single wall and on beam on the other side. What is the "proper way" to get the wind loading? I just feel that the...

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