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I did not check the numbers since I’m not that familiar with US units and load combinations, but it does not look like it should be that unstable. I have two things to say: 1) I would not generally consider the help from a sidewalk unless I really need it, I’m certain that it will stay there...

I'm confused, could you explain this?

It's highly geography-related I guess, it's very VERY different here regarding cars. Fines for that would be huge and usually people drive really old cars that need a lot of maintenance. But my point is that everything in this world needs a check-up now and then. We even require it for people -...

Why do we even make a design life if after it has expired twice we still say "oh this is fine"? It's ridiculous. How long should we let buildings stand without a repeat calculation - 200 years, 500, 2000, until it falls down? If you want to use a car you need it to pass a test every year...

What would be an example of that? A free-standing wall? I know you're trying to make fun of my question, but in regular cases there are walls in both directions. It's not an outer basement wall because of the holes. The only realistic scenario that even comes to mind is outer wall exposed to...

Yes. This foundation looks really unusual, I've never seen anything like that.

I think they use ASD all around the world. This is interesting, I have never heard of that. It maybe comes from an idea of a dynamic response of a rigid block - you need a larger force to overturn the block if the load has a large frequency compared to a static load. It's just my attempt to...

In what situation would you consider out of plane strength of the wall? I always assume it to be pinned and transfer the load to the walls in the other directions. It seems more reasonable to dedicate elements that transfer load in each direction separately than to simply assume that everything...

So bolts are supposed to be anchored to the masonry? Not a good idea in my opinion. You could have a tensile failure of a brick or the whole brick pulled out of the mortar. Why not make a concrete footing below the masonry?

Nope, it would crush. That is a completely different type of failure. But surely if this type of failure is possible there should be at least one photograph of any arch/vault/dome failing by punching... or some scientific paper about it. I just disagree, sorry. Look at this work (it's about...

In eurocode this would be 10 bar diameters as this is the minimum, either splice for that length or embed in a beam for that length. It seems he went with 20 diameters, it does not seem extreme to me. That said it depends if you need to consider other things, e.g. if this splice is important for...

concrete metal deck SLAB is not a concrete metal deck VAULT! Imagine a vault that is extremely high… it becomes more like two colums at an angle than a plate. Shear or flexural stiffness do not mean much to a compresion member like a vault, it’s pure axial. It’s more like trying to punch an egg...

I do not feel like this is possible, especially with the sheeting underneath. Is there a case of a vault failing due to punching? I'd expect it to fail by a 4 hinge mechanism under a point load. Even if it does fail locally, it should still be fine.

That is bending moment of plate you're talking about I guess. 0,25 should IMO be a reasonable guess for the lowest expected stiffness, but you could check that by simple analysis of a completely cracked plate. The question for me is how certain are you that during an earthquake (if it's of...

Punching of an arch? I have never heard of that happening. How does an arch punch?

It all depends on a specific case. It's hard to say more with the information that you provided. You should hire a structural engineer to calculate it.

Just to make sure I understand, glazed = glass? What seems to worry you, additional vertical deflection due to long term effects or something else? Because deflections can usually be controlled without using a steel beam.

Unfortunately I did not save that model, it was a quick check... I guess it should come out the same since deflections are symmetric. Even if it did not, clearly some combination of wall rigidities would lead to the wrong conclusion even if you check it span by span. Yeah, it's hard to see the...

Oh, ok... your previous picture does not show that, right? That solution would have 4 more edges if I can visualize it correctly. I really don't like this idea. It's a very messy system of spatial struts that are hard to visualize and the meeting point of the struts at mid height is held from...

I dissagree. It makes no sense to me to compare the actual deflection with the flexible variant. For example. Imagine three lines of lateral force resisting systems. If you consider the diaphragm to be completely flexible it would distribute the load by tributary area, meaning that the middle...