I haven't looked at NFPA 13 in a while (my hard copy is dated 2002:cool:), so I looked it up. It turns out that there are now three flavors of NFPA 13. The regular flavor of NFPA 13 is for both life safety and fire protection and is primarily used for commercial/industrial/institutional...
I have a suggestion regarding your long calculation that also applies to every calculation that you perform: please attach units to each number that needs one.
As I suggested above, you could try the SGMA website to see if it has shallow groundwater levels for Ridgecrest. I haven't looked at that website in detail in a couple years, so I don't know if it can answer your question. The four maps it presents have data points in and around Ridgecrest...
Where? California or the Gobi Desert or Europa?
If it's California you are after, this data is available from the California Department of Water Resources, including the related Sustainable Groundwater Management Agency website (https://sgma.water.ca.gov/CalGWLive/). Many local irrigation...
Please see the attached example that uses the cspline function for interpolation as Stress_Eng suggested. I pulled the relevant pieces out of a worksheet that I made several years ago for designing traffic slabs per ACI 360R. The .zip file includes a Mathcad Prime 9.0 worksheet and a .pdf...
Were you contracted with the architect or with the developer? If it was the architect, then if they're off the job, you are most likely off the job as well. If you were contracted with the developer and working in parallel with the architect (not common, but it happens sometimes), then you...
Have you compared the weight of the proposed tank when full to the weight of the soil to be removed? I did a quick back-of-the-envelope calculation, and it appears to me that the full tank will be somewhat to significantly heavier than the soil that will be removed. This will increase the...
Years ago, I worked with a very smart guy (since retired) who did a triple bachelor's at an Ivy League school (as I recall, it was Mathematics, Physics, and Economics), then earned a master's in Civil Engineering from some other big-name school. He had no problem getting his PE in California...
ACI 360R, Chapter 5, Section 5.5 talks about line and strip loads, but provides no math, then refers to Chapter 7, Section 7.2 (Case 4 might apply to your situation). Chapter 7 also references the Appendices, which include examples using the PCA and Army TM methods, but I haven't looked at...
Have you talked to the highway department? It's probably their culvert and they would be the ones to decide if it's allowed.
From an engineering perspective, I can envision putting your 2" HPDE pipe inside of a 4" (?) steel carrier pipe that is securely attached to the roof of the culvert...
PE_JRM…
You are correct that the charts in the PCA document only go down to 5". It's not my primary reference and I hadn't noticed that before. Also, all of my traffic slab designs have resulted in a section thickness of at least 6".
ACI 360R, on the other hand, is equation-based and should...
PE_JRM…
In addition to Army TM 5-809-12, you may also want to look at ACI 360R, "Guide to Design of Slabs-on-Ground", and the Portland Cement Assocation's, "Slab Thickness Design for Industrial Concrete Floors on Grade". Their methods are not identical, so comparing the three documents can be...
The US Bureau of Reclamation published a book in 1978 titled Design of Small Canal Structures. You can download a PDF of the book here: https://www.usbr.gov/tsc/techreferences/mands/manuals.html (it's partway down the page). Chapter V, Part E covers weirs. I haven't read this section of the...
I am not aware of any requirements for a roadway or project alignment to follow the centerline of a right-of-way, even though it is often (but not always) the preferred solution. I know of quite a few road and project alignments in Central and Southern California that do not follow the...
LittleInch…
Excellent commentary about units. Calculations like this justify using Mathcad or Smath.
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"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill
tmalik3156…
This is not my area of expertise, but I think hokie's suggestion is excellent. For esthetics, you could make the bracket the same size and shape as the proposed corbel, and you could paint it to either blend in to the existing concrete or stand out as an architectural feature...
As I understand the article, the Court did NOT say that the proposed rule was wrong, only that the agency didn't properly justify it as required.
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"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill
There is no fixed percentage of or rule of thumb for "dead space" in a water storage tank, but I can tell you from experience that 50% is far too conservative as you surmised.
Are you working with AWWA D-100 (welded steel) or D-103 (bolted steel) and will the water storage tank in question be...
I suggest you contact the owners of these other facilities to find out what their own requirements are.
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"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill
