It is a little sad, though also understandable, that so much of "engineering judgment" has been taken out of things....
Thankfully for myself many of the projects I am involved in, engineering judgment is alive a well! I'd like to believe that in "normal structures" my designs are efficient...
As a builder pointed out to me recently. He has to give a 6year warranty on the home based on local laws. It doesn't matter what the CURRENT owner agrees to regarding serviceability. If the owner in 4 years time takes issue with the outcome he will have problems.
We were discussing the...
IMO the risk/return doesn't seem make sense for an engineer to be playing those games. With longer spans and cantilevers it is pretty much all about serviceability in the residential world.
I remember seeing one of these type of designs. Except there was an ugly great column in the corner...
Is this a new approach to a "humble brag"? Post something clever you have done and ask others how they would have done it differently? ( :LOL: joking)
I agree with Ron. This seems like a good solution. The best choice here IMO was to design an approach that didn't need shoring. That makes...
I'm hoping I'm not repeating myself too much here but I agree 100%.
Especially with the digging deeper than rules of thumb. So I would definitely say go for it. It already sounds like you have done suitable research into the issue, you are only hesitant because the guidelines/codes say...
YES. That is my short answer though I would can't give a comprehensive argument to support it. I think a plate embedment length equal the largest of the two sizes of a rectangular/square/circular HSS is an excellent rule of thumb to ensure that shear lag is not an issue. I've normally...
No offense taken. :)
I'll occasionally point out what I see as absurd stubbornness. I know it's an argument I won't "win". And I am kinda picking a fight. 🫣
Eng-Tips, is a international forum though primarily populated by US engineers. I value the forum and I value the discussion, help...
That is certainly converting to the metric system. Things don't have to be nice round numbers to be converted. It just has to be use of the metric system.. Sure nice round numbers are "nice to haves" but they don't make or break the massive advantages through the use of a coherent unit...
Lol that is one of the best arguments against the metric system I've every read! :)
Yeah, we our trailing powers of 10 can be a bit of a handful when you first start engineering. But you quickly learn to either deal with them not even write bother writing them down. You can even mix and...
No disputing that change can be difficult. That was implicit. But this strong desire against sensible change does seem quite prevalent in the US and relevant in ASD/LRFD because most of the world has made the change and moved on.
Same regarding the metric system. But that hasn't prevented...
Most of the time the bearing capacity supplied by a geotechnical engineer is more settlement driven that total failure. I wouldn't fear exceeding it in a single event.
That said like XR250 said, grade beams are great for dealing with fixed base connection.
So now it has gone from your deriding description of "I see LRFD as dressed up ASD." to "It’s a technical refinement."
So you seem to be moderating you language somewhat. I'm still a little confused if it was a merely a technical refinement why is this even a discussion? It clearly involves...
Sorry the cause of this aspect of misunderstanding is all mine. My post was meant to say 16km. But I mistyped. :sleep:
Well of course when you have centuries of evolution, development and research you are going to use rather than deliberately forget about it and start restart your material...
And here is a paper from 1981. The arguments haven't changed, what has changed is who has chosen to adopt LFRD or stay using ASD.
Load and Resistance Factor Design (THEODORE V. GALAMBOS)
Well it is kinda like the metric system. For some reason the US doesn't seem to want to change while the rest of the world has.
I'm not from North America and I do look at the stubborn use of both with continued surprise.
I believe we might have butted heads on this before.... Your claim...
True. I was wrong in that aspect of my post. I agree with your logic.
I did consider the that superposition logic. But I dismissed it due to the bolt 'preload logic'. But bolt preloading is non-linear. It is extremely stiff until preload is lost. In this circumstance that nonlinearity...
Oh and for what it is worth.
The problem has to assume non buckling for the problem to be valid as presented as buckling would introduce non-linearity.
The problem as presented (n>2) I believe necessitates compression in the rods. If the rods are say cables with tension only then (n>3) I...
I disagree with this from two aspect.
Preload clearly can increase deflection It is a similar to preloading bolts or bicycle spokes.
Also regarding a bicycle when the 'stretching' of spokes horizontal or otherwise is negligible. The primary way a bicycle load path works is via a reduction in...
Forgive my brethren for being engineers rather than mathematicians, as this is more of a mathematical challenge than an engineering one. :giggle: I'm myself am also an engineer but I was once (at least by education) a mathematician, so I'll attempt to provide the steps that may lead you to a...
Codes change. Physics stays the same. This has been the case long before computers and engineering software.
It really is up to the user to know the limitations of their tools. Be it their pencil, their slide rule or their software. Most importantly you need to know the limitations and...
