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  • Users: bimr
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  1. bimr

    CT Corrosion

    Okay that was a scam, but many others are complaining: Here are some more pictures https://www.cbsnews.com/news/tesla-cybertruck-rusting-complaints-from-owners/
  2. bimr

    CT Corrosion

    CT owners have been complaining for months about other corrosion problems as well: https://www.cbsnews.com/news/tesla-cybertruck-rusting-complaints-from-owners/ Some of the CT Owners are wrapping the "trucks" in vinyl for $6k wrap...
  3. bimr

    CT Corrosion

    Ed, Have you seen the numerous reports of stainless steel from the tesla cyber truck owners. Here is one today: https://www.torquenews.com/11826/tesla-cybertruck-becomes-extensively-corroded-after-exposed-magnet This doesn't appear to me to be a good application for stainless steel for...
  4. bimr

    Centrifugal pump Static Pressure

    This is what physics tells us. The fluid velocity is at 90 degrees to the centrifugal force:
  5. bimr

    Centrifugal pump Static Pressure

    The fact is that pumps create flow, not pressure. Pressure is the resistance to flow. Consider a hydraulic hand pump, when the lever is moved up and down, fluid is removed from a reservoir and sent to the connected equipment through a hose. Suppose the hose from the pump is not connected to...
  6. bimr

    back pressure valve for sewer forced main.

    With all respect to the previous posters, neither the duckbill or the Auslaufklappe are suitable for this application. The duckbill valve will allow the pipe to drain. The Auslaufklappe is a tidal check valve. What is needed is a full port wastewater valve suitable for wastewater. full port...
  7. bimr

    Rust on Coating Surface

    If you can wipe it off with a rag, are you sure it is rust? How about posting a picture?
  8. bimr

    AWWA D110/D115 Tanks

    Completely buried tanks? Completely buried tanks are no longer acceptable if this is potable water. Refer to the ten states standards. The problem is that one can't tell if the tank is leaking if it is buried.
  9. bimr

    Rerouting and existing building to reconnect to an existing building sewer

    I don't think the plumbing code official will allow what you have proposed. You should be using long sweep elbows joined by a short length of pipe. Refer to the ICC: https://codes.iccsafe.org/s/IPC2015_NY/chapter-7-sanitary-drainage/IPC2015-Ch07-Sec708.1.4
  10. bimr

    Sanitary sewer pipe thru box culvert?

    Where I am located the State DOT has this regulation: "Utilities should not be permitted to cross under highways in cattle passes, culverts, or other drainage facilities."
  11. bimr

    Engineering Proposal Estimation in 2024

    It is hard to respond to your post with the little information that you have provided. The area that you are working, residential and small commercial is very competitive and isn't an area that will support high margins. Have you done a profit analysis of your work? Make a spreadsheet with the...
  12. bimr

    Black roll underground poly pipe question

    Look on this website to determine what you have: https://www.plasticpipe.org/PPI-Home/Municipal_Industrial/Publications/Download-HDPE-Handbook-Chapters.aspx
  13. bimr

    Sanitary sewer pipe thru box culvert?

    It may be an easier process to install your piping using HDD instead of the culvert option. 450' of HDD is a run of the mill project, nothing special. You haven't presented a site plan nor a geotechnical analysis, nor location. Are you concerned with the possibility of freezing? The culvert...
  14. bimr

    Sanitary sewer pipe thru box culvert?

    What are you running, a gravity sewer or a force main? What is pneumatic tunnel boring? Why do you state that HDD is expensive? You can construct this within a week?
  15. bimr

    Polystyrene Aggregate as Drain Rock Substitute

    Never have seen something like this used for the application that you describing. Polystyrene seems to be so light that one would never be able to keep it in place. Is there a particular material that you are looking into?
  16. bimr

    Contract Clause Question

    That's why you should have a good project manager. It's not like you are going to wake up like Rip Van Winkel 2 or 3 years later and find that you an insurmountable problem. You should be having regular project meetings and documenting the meetings. Your client should be reviewing your work as...
  17. bimr

    Looking for threads relating to best practice/calcs for building temporary supports for mobile struc

    As a rule of thumb, the soil is generally able to support loadings of approximately 1,500 lbs per square feet. You would want the supports to have enough area to spread out the loading so that number is not exceeded. There have been many instances of stages collapsing. For that reason, and with...
  18. bimr

    Contract Clause Question

    There is also a well known phrase regarding the legal system. “Don't tell me what the law is, tell me who the judge is.” The relevance of that quote lingers for a reason. I am amazed that people assume that judges know what the law is. Judges don't go to school to study in depth what is...
  19. bimr

    Contract Clause Question

    Generally, there are only 2 or 3 contract conditions that shouldn't be accepted. You never want to accept "liquated damages" or "time is of the essence" obligations. Both of those contract obligations may put you out of business or end of costing you big money.

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