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The pressure I'm referring to is interior roof pressure, the P and Pt terms in those anchor equations. "Couldn't I just treat the tank as a cantilevered beam/pipe with a moment, and use the moment calculated from ANNEX E to calculate the max tension at the fixed side?"- that is basically what...

"I don't understand what their argument would be for neglecting it. It clearly adds to the clockwise overturning moment about point B." I don't see anything in the original post that indicates where those loads are coming from. But if it's subject to a building code, that code will generally...

The definition of U is misleading. It shown as "net uplift". It should be "maximum uplift per bolt times the number of bolts", so that when divided by the number of bolts, it results in net uplift per bolt. If you treat the anchor bolts as a uniform thin ring of metal, radius R, thickness t...

I'd call and ask. They may have overlooked something. It may be far enough down that it's a non-issue. I can visualize hitting little pockets down there vs hitting an entire weak layer, and that might make a difference. You'd think if it was an entire weak layer, the surface soils would all...

There is this standard. I'm not familiar with the current issue, so can't comment on the usefulness: https://webstore.ansi.org/standards/nace/nacestandardsp02942006

You don't say what your application is. But there have been a number of posts through the years in the Structural Engineering forum, dealing with glass railings, or glass-filler in railings, that might be of interest if your application resembles that.

That "corners rounded" clause would apply, if, say, you had a 1/2" repad with a 3/8" fillet around it. With a 1/2" repad and 1/2" fillet, the surface falls under the "fully covered" clause. I think the old bolted door sheet detail used sharp corners. I'm not sure how (or if?) they worked...

Looking at this a bit more: -For repads, per the wording of 5.7.1.8, you could use repads that were square or otherwise had corners, and that would fully comply with the current API-650. IE, that nozzle detail could be used right now with the current code, "as long as the reinforcement meets...

I notice nobody actually answered the original question, so I was googling around a bit. I did find these rather general items of interest: https://towercranesupport.com/Tower%20Crane%20Weather%20Preparness.pdf https://www.cranestodaymagazine.com/analysis/weathering-heights-4887884/?cf-view...

Even in API-650, you're allowed to use alternate designs. I don't recall right offhand if there is anything requiring rounded corners on nozzle reinforcement. (There is a requirement for miscellaneous repads, though, but I think it's fairly recent, too.) On an issue like this- it is...

Note that an owner can specify more stringent requirements for materials, welding, or inspection if required by the particular services; you're not limited to the standard requirements.

I think one of the news items I saw said that the stadium roof was cable and fiberglass. I guess the big question, if the roof was "expendable", was everything inside that stadium designed to be weathertight, or was there a whole bunch of "indoor" stuff that all got dumped upon? We had a...

There is an API publication that involves setting the tanks, but I don't know if it addresses this issue: https://www.apiwebstore.org/standards/12R1 NFPA 30 addresses spacing for tank-to-tank, but I don't know that it addresses tank-to-flame-source. It should be available for free viewing on...

When I first started getting involved with pressure vessels, I attended a week-long class put on by ASME and that was very helpful. On the books above- Bednar is helpful, but more so for related topics rather than understanding code itself. Moss is excessively cook-bookish, so I bought it and...

“If you don't make time for your wellness, you will be forced to make time for your illness.”- A common quote that might relate to the topic.

For typical vessels- assume straddling principle axes. This assumes piping coming up to the tank is aligned with or at cross angles to those axes. Large storage tanks- typically straddle radial lines, not principle axes. Medium storage tanks in congested plant environment, or small storage...

My advice is to go ahead and schedule a complete inspection inside and out to see what you're actually dealing with. Based on the shell thickness, it sounds like this was either designed to low stresses (AWWA tank, for example), or to store molasses, fertilizer, acid, or other heavy products, in...

Do you maybe mean washers? Thread length is not generally adequate to put a nut under the head, is it?

I've tried googling different likely terms with no success. All the optical-stuff seems to be set up for use on a rail, not just on a table-top. Perhaps the same usage here, but on a bigger scale? This looks factory-made to me, but a lot of old factory-made stuff like this will have some sort...

I'm not sure I understand the question. But see Paragraph 8.1, which will allow you to lump some of those thicknesses together, assuming the weld types are the same. Also see Figure 8.1, which makes a couple of items clear that are not otherwise clear in the text.