Recent content by FacEngrPE

Link to USGS shake map https://earthquake.usgs.gov/earthquakes/eventpage/us7000pn9s/shakemap/intensity Bangkok ground shaking was nowhere near as intense as near the fault.

7.7 magnitude earthquake, building under construction. Many under construction buildings will not meet design case load capacity, and this was a strong shaking. Many other buildings / structures damaged. This is clearly a tragedy. Building collapses in Bangkok after powerful earthquakes...

I suspect that after the track is in place, it will have a much slower speed limit than previously, until it is machine tamped several times Tamping Machine Wikipedia and then measured with a geometry car. The better the track geometry the faster the allowed maximum speed limit. Other things...

Designs in orbit has some videos showing tracked equipment working on the Clinchfield Railroad. Here is one.

The Key Bridge Collapse NTSB after action findings start to arrive, as we suspected there are a number of bridges at risk of ship strikes. March 18, 2025 NTSB Report MIR-25-10 Safeguarding Bridges from Vessel Strikes:Need for Vulnerability Assessment and Risk Reduction Strategies With...

Some video I-10 Bridge Collision in New Mexico Casey Jones - Per NM Vdot span will be contracted for replacement soon. Entire bridge was already scheduled for reconstruction in 2027

To program the height in the GPS it needs to be measured.

Skydrol™ = aviation phosphate ester. I have some experience with a different phosphate ester, it is seriously difficult to ignite, I doubt that was the cause of the fire. My bet is on a fuel leak.

https://en.wikipedia.org/wiki/Swiss_cheese_model Obituary on Wikipedia His work in the Safety and Reliability field is impressive.

Dominion Power places arrastors on underbuilt distribution Application of Station Class Arresters on Underbuilt Distribution Lines; INMR, July 19, 2024 indicates 2 km spacing of station class arrestors is effective in protecting underbuilt distribution from the top higher voltage layer. The...

Trying to use undervoltage ride through to keep a positive displacement pump working seems too risky (as pointed out above). If you really want to try this construct an experiment, to prove the concept works. Solutions that place a UPS in the motor starter(s) feeder, and solutions that place...

The preliminary NTSB report is out News Release Reports AIR-25-01 Investigations DCA25MA108 This illustration clearly explains why the recommendation is to prohibit helicopter flights when the runways are in operation.

This looks like composite concrete with the girder being a bulb T. If this was a job handed to me I would (as the previous responders indicate) Close access to the public as the walkway cant be safe for pedestrians. Start a hunt for a structural engineer specializing in concrete structure...

I would handle this the same as boiler blowdown. The minimum volume of the receiving blowdown vessel is approx 3x of the blowdown volume. Then the liquid needs to be drained before the next blowdown. If you use an open top tank expect some liquid to splash out the top, depending on how the...

Enlarging the picture posted by the OP, I see a fatigue crack (more resolution would be helpful), but no weld. Do these hangers get any periodic NDE? A dye penetrent test would find this. A visual inspection might not.