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I wonder what the H2S monitors sense. The human nose is quite a good monitor, but maybe not good enough.

'Unbonded' typically means without grout. So if that is the case, it would have required protection by other means.

Sym P. le, Your question would assume bonded post-tensioning, with inadequate grouting. Do we know that, or was it an unbonded system, with inadequate protection?

Whether cable or bars, the issue with this bridge was apparently corrosion. Does anyone know what was supposed to protect the reinforcement?

Yes, when I saw the damage done in Western NC, I immediately thought of Camille. Nelson County VA has very similar topography to those areas in NC. The western NC flooding is not really unexpected. The same thing happened in 1916 to Asheville. They thought they were more ready this time, but...

Not strictly applicable to the US, but we have flooding in Australia as well. Experience here was that after any major event, there were arguments about what was covered. Riverine flooding, storm surge, overland flash flooding, storm water drain blockage, etc. Most insurance companies have...

The Democrat response to Project 2025 is a sign that they are desperate. The Heritage Foundation think tank has been producing documents like this for 50 years, and never before have the Democrats been so strident and dishonest about the conservative goals.

The plates and rebar will give you a chance to keep the embedded item in place during concrete casting. If this is internal, I would consider placing the 'cap' plate down on the formwork for that reason.

Shear friction theory is just that, a theory. It is a set of arbitrary rules loosely derived from testing.

No, I think you are confused, or mischievous.

The bolts just work in shear to transfer the strength deficit from the wide flange beam to the channels. The channels don't need to be full length, as the wide flange will doubtless take the shear without reinforcement, provided the end connections are adequate.

I like human909's proposal. That allows drilling the beam web (thinner) horizontally rather than the flange vertically from the bottom. And the bottom flange solution would require enough bolts for composite action, while the web bolting would only need to transfer the shared load.

But none of them are the end.

This was in another forum on the site. Thought it should also appear here. https://babylonbee.com/news/experts-warn-hurricane-forming-in-hurricane-alley-during-hurricane-season-is-clear-sign-of-climate-change

Why not use a steel bracket rather than trying to replicate a concrete corbel? Still have the issues of drilling and installing new anchors, but not the mess of formwork and casting concrete.

If the post installed anchor and end plate connection works with a square column, there is no reason it won't work with a round column. You just need to shape the plate to fit. Edit: On second thought, and after reading the earlier thread, the beam is between two circular columns, so...

If it is a mat foundation, I would use half top, half bottom. But for a general slab on ground, the only force which causes shrinkage cracking is friction with the subgrade. So cracks most likely propagate from the bottom.

If your question is just about steel beams being affected by creep, the answer is no. Steel deflects under load, but it doesn't creep.

Japan has removed a lot of solar farms. They need the land to feed the people.

The 'Coal Mining companies' in Australia are not booming. The money goes to prop up the governments, state and federal through royalties.