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  • Users: ChipB
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  1. ChipB

    Max Shims under Steel Beam Bearing Plate

    I'm not picturing it in my head, but.... I work in the heavy industrial section and it's not too uncommon to provide a grout bed in excess of 3" for leveling equipment and what not. Grout it with a high quality, non-shrink grout. I typically specify Five Star grout.
  2. ChipB

    Restrained Retaining Wall

    XR250 is correct regarding using the basement slab as a restraint. From your description on the construction, it's a "relatively rigid wall" by ASCE 7 standards. If you don't have a geotech report stating what soil pressures to use for design, you go into ASCE 7-16, Table 3.2-1, and find it. For...
  3. ChipB

    Omnia Precast Slab Load Tables

    Being upright and taking nourishment definitely beats the alternative. Glad you're doing well!
  4. ChipB

    If I have a CMU column experiencing a small amount of wind overturning, does the footing need top reinforcement?

    Are you using a strength level wind load, or a service level load? If you're using the amplified service level wind load, it might not be overturning under the strength load.
  5. ChipB

    Omnia Precast Slab Load Tables

    Thanks JAE! It's been a while! Glad to see you're still on here! How have you been?
  6. ChipB

    Retaining Wall Inspection Criteria

    Several years ago, I was called out to look at a railroad tie retaining wall which the contractor had constructed by tying back deadmen on a spec house he was building. It was 24' tall. The deadmen only went back one RR tie length and were connected to the face of the wall using 12" long spikes...
  7. ChipB

    Omnia Precast Slab Load Tables

    In my 30+ years of practicing structural engineering, I have not come across one of these precast slabs until now. The one I am looking at, was constructed in 1988, and I can't find any information on allowable loads. Does anyone out there have any information on these, other than the current...
  8. ChipB

    HP 15c re-release, Anyone still using calculators

    What is it with engineers and bikes? I have a Colnago CT-1 (Campy) A Cannondale Six13 (Campy) A Kona Jake the Snake Cyclocross bike A Catamount MTB 2 Santa Cruz MTBs (one is a 29) Calculators: 1 HP48GX 3 HP48G I HP 49G+ (The buttons suck.) An HP 35s AND...... A Deluxe Edition HP 15C that I...
  9. ChipB

    fiberglass rebar in slab-on-grade

    I agree with Dik and Dave. I had to design a reactor foundation on one of my solar projects. Fiberglass was considered, but in the end, I just designed it as unreinforced concrete. ChipB
  10. ChipB

    Slide Rule Era

    Well, crap!!! I didn't realize SlideRuleEra's site was down. SRE, Thanks so much for everything you have contributed!!! I downloaded many valuable publications from your website!!! Now, if I can just remember where I saved them.....
  11. ChipB

    Concrete block.foundation cracks

    I've called out for these in the past: https://www.griptite.com/foundation-repair-products/wall-anchor-system/ They engineer it and install it.
  12. ChipB

    Segmental retaining wall remediation

    Still with the same company. Just changed names/owners. In Greenville 3 days/wk. Remote the other 2 days.
  13. ChipB

    Segmental retaining wall remediation

    BAretired and JedClampett, Thanks! You guys are always great!
  14. ChipB

    Segmental retaining wall remediation

    Approximately 9 feet at the highest. Supporting a parking lot.
  15. ChipB

    Segmental retaining wall remediation

    I have an upcoming project where the face of the CMU in a segmental retaining wall has degraded. In one section, you can see the interlocking pin for the CMU and the gravel is slightly coming through. I suspect the freeze\thaw cycles as the main culprit in the degradation of the materials. The...
  16. ChipB

    Footing Uplift Resistance

    Long ago.... The load combination used to be 0.9DL + 1.5WL for the 1.5 factor of safety. The thought behind the 0.9DL, is, we, as engineers, may put a little too much load into the DL so it was reduced by 10% So..... ASD load combination of 0.6DL + 1.0WL is really: (2/3)(0.9DL + 1.5WL) => 0.6DL...
  17. ChipB

    Metal Floor Deck

    Nice catch, NJ92!
  18. ChipB

    Eccentric Footing e>L/6, Formula for Moment calculation?

    Well, it's not a confidential client, so I assume I can share my calculations. See attached. I hope it helps.https://files.engineering.com/getfile.aspx?folder=a04f86e3-71fc-4219-bfd4-566547264cd2&file=ARBORETUM_CALCS.pdf
  19. ChipB

    Crane Rails

    FLCraneBuilder, Wow! You've helped me a lot. Or...… You've hurt me a lot... LOL Thank you very much!!! Chip
  20. ChipB

    Crane Rails

    retired13, Thanks! The 1st Edition was the most difficult to get. I'd see them on eBay for hundreds of dollars. I went to powellsbooks.com, and looked for it. Of course they didn't have it, but there was a button to "Notify me when it came available." So I clicked it. It took a few months, but...

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