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  1. Ron

    Pallet Jack and Racks on Wood Floor System?

    Since storage racks tend to place high shear loads on the flooring, you might consider some simple sleepers to spread this out. Pay close attention to the orientation of the sleepers relative to the joists.
  2. Ron

    2 X 2 inch grout cubes

    The mass of gang molds for 2x2 cubes is significantly greater than the mass of the cubes. Small disturbances of the molds result in large disturbances to the samples.
  3. Ron

    Soil sieve set for performing grain size distribution

    The minimum according to ASTM D2487 is #4, #10, #40 and #200. That results in a rather poorly defined curve for determining D10,D60...etc. It is common practice to use 4,8,16,30,50,100 and 200. This allows a defined determination of the gradation curve as well as being able to compute the...
  4. Ron

    Subgrade liquefying during compaction of first lift

    Agree with EireChch. You probably have normal dilation and pumping, not actual liquifaction. You could also mix in a few percent portland cement and call it a day.
  5. Ron

    Ground bearing slab - Traditional Approach for Bearing Capacity?

    I notice you're in Great Britain...you probably have a minimum prescriptive code requirement for bearing capacity. In the US it is often 2ksf (96kPa). For analysis, yes, a conventional approach is fine.
  6. Ron

    PDF Terzaghi Lectures

    The Terzaghi lectures are copyright protected and can't be posted here (or by law, anywhere else!)
  7. Ron

    PE Seal On Details

    You should not seal their details. If you include them in your plans, add a note that the details were provided by X and they are required by X, but you have made no evaluation or assessment as to their viability.
  8. Ron

    Schmertmann Method using CPT vs Using Modulus of Elasticity

    Precision in settlement calcs is like measuring with a micrometer, marking with a crayon and cutting with an axe.
  9. Ron

    Ground floor slab in area with High water table

    Have you considered placing a lean concrete "mud slab", applying coal tar waterproofing and then waterproofing the exterior walls of the below grade sections? Agree with SRE...french drain won't work
  10. Ron

    E&O Insurance

    My insurance is through Admiral. I do a lot of condo work, but mostly forensics so liability is lower. Premium is about $12k per year for $1 mil policy.
  11. Ron

    Rebar scanning

    We use GPR and have both an older Proceq and Hilti scanners. GPR is more accurate and provides a good graphic representation.
  12. Ron

    Can we use RCC Slab/Roof as a floor directly for the next level

    The roof slab will have to be analyzed to see if it can structurally withstand the loads for a floor and potentially additional loads from the structure above if it can't be passed directly through columns. The code mandated loads on a roof slab are different than for a floor slab, typically...
  13. Ron

    Hello All, Forgive me if this ha

    dik is correct. You will have to take ownership of the project. Your state board likely has a procedure for assuming a project from another engineer. It can get expensive as you are typically required to review their entire design, validate it and take if from there under your banner.
  14. Ron

    Stair stringer modelling in RISA 3d

    Bottom connection is fixed...top connection is pinned.
  15. Ron

    Do you use Eng Paper

    I use calc pads with grid and pre-printed with my company name and logo
  16. Ron

    HSS to HSS weld

    How about a weld symbol that shows a fillet all around?
  17. Ron

    Open Web Steel Joist - Top Chord Analysis

    Most open web joists of that period were empirically designed so doing an analytical replication is quite difficult.
  18. Ron

    The grout shall be segregate

    Grout should never segregate. Sometimes spec writers don't even know what they are writing and don't understand the implications.
  19. Ron

    Structural Engineering and Wind Load

    I agree with phamENG. I have been practicing in Florida for 45 years and have designed hundreds of structures for wind loads. I still run into things that make me scratch my head, so there is no "cut and dried" solution to basic structural design other than what phamENG said. Good luck and I...
  20. Ron

    Vibration monitoring data interpretation

    Caltrans has some good data on vibration, including interpretation

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