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  1. coloeng

    Orifice Flow- Falling Head with Non-Constant Reservoir Area

    I agree with eea, it is pretty easy to setup in a spreadsheet if you know the area capacity per elevation.
  2. coloeng

    BEST (OR FREE) POTABLE WATER SYSTEM MODELING SOFTWARE?

    I have used EPANET a few times, but it's been a few years. I doesn't have all the bells and whistles that some modeling software has, but it will get the job done.
  3. coloeng

    Small Diameter Concrete Gravity Sewer Pipes

    Could they be vitreous clay pipes? I know in my younger years that some system used the clay pipes in those smaller diameters for sewer mains.
  4. coloeng

    Sick status notification......................

    If you are allowed to work from home and don't have to report to the office, just work from home as you usually would. If your supervisor wants you to come to the office, let them know that you have a cold and don't want to infect others. I'm not sure what the issue is.
  5. coloeng

    Best material to use to level concrete pad

    Yep, missed the part about the last truck being 1 yard short. Rereading the original post, not much of it makes sense.
  6. coloeng

    Best material to use to level concrete pad

    If he used 2x6 forms, the actual thickness could be 5.5" instead of 5" which could account for the discrepancy. But, he should let us know that he values our input and at least respond.
  7. coloeng

    HDD, Duckbill Valve and Air Valve

    Answer to Question 1: Yes, HDD can do a meandering path from one drill pit. A caveat is that the degree of meander is controlled by the diameter of the drill rod. Additionally, the more meanders the higher resistance to pull-back on the pipe and the larger machine that is required, which in turn...
  8. coloeng

    Help Needed: ESE Lightning Rod Conductor/Arrester Device Manufacturing

    You probably want to post this in the Electrical Engineering forum, not the Civil Engineering Forum.
  9. coloeng

    What do all the useless engineering graduates do for work?

    Don't knock digging ditches and qa testing. That is how many engineers got started, me included. I have spent 23 years as a civil engineer working my way from a lowly design engineer to a District Engineer with a major domestic water provider. All of that started with digging ditches, installing...
  10. coloeng

    Backhoe Swing Frame force calculation

    OK, and what is your question?
  11. coloeng

    HDD Water Mains - Should Designer Specify Joint Restraints?

    You should definitely use restrained joint pipe for the HDD. Another option besides restrained bells in each joint is fusible C900. It's probably not a big deal in Louisiana, but in areas where you might be drilling through cobbly soil, the collars/bells on jointed pipe can increase the...
  12. coloeng

    Underground bunker - entrance from ground level above

    Do it like they used to do the storm cellars in the mid-west for tornados. A set of concrete stairs going down to the door with a hatch on top to keep rain/snow out.
  13. coloeng

    What does this mean in civil utilities drawings

    It could be the number of wires in the duct and its diameter.
  14. coloeng

    Calgary 2 m diameter water feeder main break

    I worked for a system that had a lot of PCCP. It was installed in the mid 1960s and started to really have a lot of breaks in the 90s to 2000s. The main cause was determined to be the high chloride content of the soil attacking the concrete and allowing the reinforcing to corrode and fail.
  15. coloeng

    Contract Specification Infrared Tube Heaters

    We are working on the contract documents for a small warehouse and plan on using infrared tube heaters. Just wondering if anyone has a good specification that they would be willing to share. Thanks
  16. coloeng

    Aggregate Base "Cap" Placement

    Yes and yes. Because the first 4-inch base course was already compacted when you placed the 2-inch base course the top 2-inch base might not bind to the bottom base course. That is probably why he wants the bottom ripped and then place the top course. As far as compaction, there is always the...
  17. coloeng

    Horizontal clearance to reaction block

    I would think it would depend a lot on the type of soil and the pressure in the waterline. 12" seems awful close to me.
  18. coloeng

    Pipe Connection - different materials and sizes

    What is the purpose of the steel pipe. If it is to allow for a tap on the line you could just use a tap saddle compatible with the HDPE pipe.
  19. coloeng

    12 mm bond breaking neoprene sheet

    Because of the difference in the coefficient of expansion between the two materials.
  20. coloeng

    Built on Wrong Property

    More bodies makes it more likely that someone's insurance company will settle rather than be dragged into court.

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