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  1. DMWWEngr

    Novice asking for engineer overview of the Great Pyramid

    I would say none. From your first link there appears to be different chambers between each "lintel"; each having it's own name. It appears as though there only purpose was to provide different chambers. --- Andrew
  2. DMWWEngr

    pipeline protection slab

    You must compact the soil. If you don't you risk settlement issues later. The compacted soil will actually help distribute the load outward. --- Andrew
  3. DMWWEngr

    Inadequate Embedment - Looking for Ideas

    Thanks!! --- Andrew
  4. DMWWEngr

    Inadequate Embedment - Looking for Ideas

    oijammu, That's interesting!! I hadn't heard this before. Do you know of a source where I can read more about this?? Thanks! --- Andrew
  5. DMWWEngr

    Why provide negative reinforcement in footings?

    whyun, Do you know what the reasoning is for not allowing J bolts?? This isn't an area I work in often but I'm curious to hear the reasoning!! --- Andrew
  6. DMWWEngr

    Inadequate Embedment - Looking for Ideas

    Thanks to all!! This gives me a few more options to look at! --- Andrew
  7. DMWWEngr

    Inadequate Embedment - Looking for Ideas

    I can drill the dowels. My problem is if I drill deep enough to acheive my required strength; the embedment depth will violate the depth allowed for my edge distance. If I drill ONLY deep enough to satsify the edge distance requirment then the strength is inadequate. vmirat, How do you...
  8. DMWWEngr

    Inadequate Embedment - Looking for Ideas

    Background: I'm designing a concrete member (door jamb - 8' tall) to support a flood gate. The concrete door jamb will be oreinted vertically and will be doweled into an adjacent wall. Then, so I could sleep at night, I was also going to notch the top and the bottom of the support (into the...
  9. DMWWEngr

    Horizontal Loads from Surcharging Revisted

    Thanks everyone for the responses. dlew, your e-mail was very helpful and gave me the exact equation I needed to verify my work. JAE, my maximum stress is just above 25psf, which would indicate that my solution is less conservative then yours, that's good :) Probably just depends on which...
  10. DMWWEngr

    Horizontal Loads from Surcharging Revisted

    dlew, If you could send me an e-mail of one of the pages from EITHER of those books would be great. That would give me another check of my answers. My e-mail is: lundy@dmww.com My current equations came from from "Principles of Foundation Engineering" by Das and the "Civil...
  11. DMWWEngr

    General Info on Spring Rates

    Greg, Thanks for the response. In your equation you listed above what is "k" and what is "m". I assume "k" is spring rate...if so, what units is it in, lbs?? TIA!! --- Andrew
  12. DMWWEngr

    Horizontal Loads from Surcharging Revisted

    Previously I had asked the effect of an exterior surcharge loading (placed on a SOG) and what it would produce for horizontal loads on a basement wall. The last loading was a uniform loading and I got a lot of great comments. As "luck" would have it my employer has changed there...
  13. DMWWEngr

    General Info on Spring Rates

    Can anybody provide general info on spring rates?? Good links on the topic?? I'm curious as to know how they effect the cars handling and how they are considered when designing a suspension. Just looking to build up my knowledge base on the subject. TIA!! --- Andrew
  14. DMWWEngr

    Post load on SOG

    RMPE, According to "Concrete Floors on Ground" - PCA: Assuming: Load=20000lbs fc=3000psi Slab Thickness = 10in CENTER OF SLAB LOADING MOR=7.5(fc)^1/2=410psi (ACI-318) 8x8 Base plate (64sqin) Allowable Bearing Stress: 4.2(MOR)=1725psi...
  15. DMWWEngr

    Design of dowel bar depth when going into existing concrete

    Hilti has some nice resources on this. A downloadable program (although I think it's only good for 30 days??) and a lot of technical data sheets on the products offered. To Ingenuity: Here's a link for a program with ETAG guidelines...
  16. DMWWEngr

    Deflection of Beam Supporting a Concrete Slab.....

    Thanks to everyone for the great responses!! --- Andrew
  17. DMWWEngr

    Deflection of Beam Supporting a Concrete Slab.....

    To: haynewp, Using the procedure you suggested (in ACI 9.5.2.3) I'm getting a ridiculouly low moment and allowable deflection. This seems like a great idea but it's not working in this case (or I've made, yet another, calculation error :-)). I'm getting such a low moment that the slab would...
  18. DMWWEngr

    Deflection of Beam Supporting a Concrete Slab.....

    No, there is a dead load being added to the beam that increases the deflection of the beam. Furthermore, I can't find anything in the construction plans that states the beams are cambered. They could be cambered but I'm figuring it as if they are not. Thanks for the reply. --- Andrew
  19. DMWWEngr

    Deflection of Beam Supporting a Concrete Slab.....

    I'm looking for a "rule-of-thumb" for steel beam deflections. I have looked in LRFD and found the L/360 for Live Load (LL) deflections but I can't seem to find anything for Total Load (TL) deflections. I've also searched the archives and nothing came up that applied to what I'm...
  20. DMWWEngr

    Plate cast into wall....

    Thanks, Got my Nelson booklet on the way. Too bad that section didn't make it in ACI 318-99. I will have to add those two books to my growing list of books to buy!! :) Thanks again everybody, --- Andrew

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