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Recent content by ctbailey

  1. ctbailey

    Septic Tank top half as two-way slab?

    Hi Ian, Thank you for your time. It is much much appreciated. A 2D (and certainly not 3D) FEA commercial license is not something I've got access to, but I'm in 100% agreement that this exercise certainly warrants it. This is without a doubt the most indeterminate structure I've been asked...
  2. ctbailey

    Septic Tank top half as two-way slab?

    Hello to the group. I've got a precast rectangular tank that I am trying to analyze. The tanks are cast in two sections, a top and a bottom. The slabs are integrelly cast with the walls, forming essentially a two-way slab with a continuous knee-wall around the perimeter. The tanks range in...
  3. ctbailey

    Tc pipe segments as well as Modeling as No-Storage ponds?

    TerryScan I believe I now understand your answer. Thank you If the pipe segments WERE NOT included as Tc segments, the subcatchment would need to be broken up into a smaller subcatchment that is draining towards the inlet of an insignificant storage pond. This way the hydrology model would...
  4. ctbailey

    Tc pipe segments as well as Modeling as No-Storage ponds?

    Hi all, I'm having a senior moment. I can't recall the BestPractice with regards to Tc segments through a subcatchment. I prefer to model catchbasins, drain manholes and the piping using insignificant-storage ponds. But... should these pipe segments be included as Tc segments as well? Or...
  5. ctbailey

    Broad CrestedWeir Profile for Level Spreader

    Thank you Peter. I understand fully. The head that may model was developing over the level lip was precisely why I asked... was not sure if the broad crested weir coefficients would make any difference. I'll be modeling my Level Spreaders as sharp crests from now on. Thank you very much...
  6. ctbailey

    Broad CrestedWeir Profile for Level Spreader

    Hi everyone, In HydroCAD, I'd like to model my typical level spreader as a pond with insignificant storage. My preferred level spreader design incorporates a level "lip" that is usually 10 to 20 feet long, with a height of 1 foot. My preferred profile is 1:1 on the upstream side, and 4:1 on the...
  7. ctbailey

    setting a theodolite adjacent to a wall or fence

    So civeng80... how'd you make out? My guess is that you eventually did your stakeout from an offset station. ___ Craig T. Bailey, PE www.bailey-associates.com
  8. ctbailey

    Plotting a Survey plan on AutoCAD with UTM coordinates

    Just plain vanilla AutoCAD? ___ Craig T. Bailey, PE www.bailey-associates.com
  9. ctbailey

    which ASTM standard to buy for aggregate gradation?

    Yeah, I saw it was $3 cheaper at ASTM, but I allready had an account with techstreet, and I am getting tired of having som much email from so many vendors. It's worth an extra $3 to not have to sign up for yet one more stupid email bombardment list. ___ Craig T. Bailey, PE...
  10. ctbailey

    which ASTM standard to buy for aggregate gradation?

    cvg - As usual: You were right exactly on-the-money! Thanks very much! I have purchased D-448 from www.techstreet.com for a mere $35. The best $35 I ever spent. Craig ___ Craig T. Bailey, PE www.bailey-associates.com
  11. ctbailey

    which ASTM standard to buy for aggregate gradation?

    Hello. I am putting together a set of specifications for permeable pavement, and a few of the paver-stone manufacturers have suggested which aggregates to use as subbases. I have seen the following called out: "ASTM No.8" "ASTM No.2" "ASTM No.57" Which standard would I purchase from either...
  12. ctbailey

    Ice Pressure on Cantilever/Retaining walls

    The US Army Corps has a cold weather research facility in Hanover, NH. They would know. Craig ___ Craig T. Bailey, PE www.bailey-associates.com
  13. ctbailey

    Infiltration Trench

    You need two ponds in HydroCad. Model the first as a standard hole in the ground, but the only outlet will be exfiltration. The calculated infiltration rate that you might come up with is what you will want to use. But the infiltration rate that your review agency will allow you to use might...
  14. ctbailey

    Check Dam Exfiltration

    So, no, there is no "simple" solution. :) But, VTeng: do you have a text book or internet URL that you can share that defines the flow rate that Jiang determined? Might it be found in some state's Storm water manual possibly? Thanks, Craig ___ Craig T. Bailey, PE www.bailey-associates.com
  15. ctbailey

    SiltSoxx vs straw wattles

    I have specified siltsoxx in the past for site erosion control, and I feel very comfortable with them. As this thread is not a "soxx vs. silt fence" discussion, I will keep my comments around the soxx. They install FAST!!!! Sure, the "certified installer" might sound expensive, but their...
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