There have been weekly reports on settlement of this building:
https://www.sf.gov/resource/2022/monitoring-reports-about-millennium-tower-retrofit
The latest one is dated July 29, 2024.
I wonder at the length of the latest "week".
spsalso
It's my belief that one cannot quench harden brass.
I've just run into someone who insists it can be done. He says he's done it. "And my Professor of Metallurgy at Stevens even mentioned it in class when we were discussing brass vs. bronze."
Can someone come up with some documentation for...
I found many good points in this video examining the causes of the bridge failure--the "whys", not the "whats".
https://www.youtube.com/watch?v=YKiyb8S-Dq0
spsalso
A fire under the freeway:
https://www.youtube.com/watch?v=R53bBD9TbxQ
A visual visit to that area using Google Maps shows an enormous amount of flammables placed under the freeway, including wood, tires, and vehicles. It's been my impression that California DOT did not allow that sort of...
Here is the NTSB report on this crash:
https://www.ntsb.gov/investigations/AccidentReports/Reports/RIR2308.pdf
Inadequate track inspection/maintenance.
spsalso
Here's a new post by Sal Mercogliano discussing the analysis of the grounding of this ship in the Suez Canal:
https://www.youtube.com/watch?v=UfchAELXsVI
spsalso
Railroad turntables support track that can be spun around to align with various radial trackage.
At first, they had only a center bearing. This meant that the locomotives had to be perfectly balanced before the turntable was turned (much like a swing bridge).
Fairly quickly, a ring rail was...
Interesting that the glass itself failed, rather than the mounting:
https://abc7news.com/storm-shelter-in-place-order-california-street-falling-glass/12953868/
spsalso
https://www.cbsnews.com/news/ohio-train-derailment-causes-big-fire-evacuations/
Note the mention of extremely low temperatures.
I suspect that is the cause*.
And I suspect the train crew should have been told to operate at restricted speed, because of that possibility.
And/or the trackage...
The Independence class can only go at high speeds on a nice day:
https://www.navytimes.com/news/your-navy/2022/05/10/the-littoral-combat-ships-latest-problem-class-wide-structural-defects-leading-to-hull-cracks/
The Freedom class is being scrapped. And it's not because they're old and worn...
We've talked about the railroad bridge over Highway 101 at Ventura CA, and the addition of unnecessary steelwork thereon.
Here's another one, but I doubt there's anything unnecessary. In fact, it visually feels like something is missing.
The bridge is at Cuttingsville, Vermont.
Here's an...
Below is a link to a photo of a railroad bridge (build date 1961) over Highway 101 in Ventura CA:
https://c1.staticflickr.com/3/2600/3924736355_282e9c38fb_b.jpg
I see that as being a two-span truss bridge.
I am wondering about the reason for the horizontal member along the top, immediately...
I recently received a publication that shows a photo of what is likely a jiffy-quick railroad bridge/trestle, built by the US Army somewhere in Europe during WWII.
Here should be a link to the publication. The photo is on page 20:
Link
The two locomotives are American made for the...
