Yes, that would be the overturning moment.... oriented in the direction that puts the loaded column in compression.
The stabilizing moment would be the moment that acts in the other direction. So, 200 * 1.0 = 200 kN-m.... Meaning that you'd have to add self weight in order to resist the...
My thoughts about this:
a) I like simple and approximate solutions rather than exact solutions. I'm not doing a PhD thesis for every small project. Not worth my time, not worth the client's money.
b) Simple Option #1, just share the total load between the two beams based on their relative...
First, I tend to assume that the footing is rigid. Which means I convert the loads / moments to an equivalent load and moment at the centroid of the footing. At that point, I use the same basic calculations that we use to determine the soil bearing and Overturning / Resisting factors that we...
I wouldn't call 30% a small value. I think having the UY behavior split between modes two and 4 is an excellent reason why you would WANT to use the response spectrum method. Let's say you have moment frames at the top story and shear walls below that, this could easily result in the behavior...
Maybe I have something different in my mind. But, I think of equipment skids as basically a steel platform that is directly connected to the concrete foundation. The main purpose is to provide something that you can bolt your equipment onto.
If that's what you're dealing with, then it seems...
I swear I've been on a project where they used non-metallic grating before. Same look as metal grating, but with a fiberglass product. You just look at the allowable span for the most part. I didn't see any problem with these products. Though, to be fair, I really don't have much knowledge...
In the Y direction, I have no concerns. The behavior looks really good. Have mode 22 and 36 which control the behavior.
The X direction is kind of messy to for me. You've got one real shear line at column line 5. My design emphasis would be on a few things:
a) Seeing if I could stiffen up...
What's the age of construction? Is this brand new construction? Has the building been around 30 years?
Do you have drawings for the building that show you how these different elements connect?
Honestly, there is little we can tell you about this crack without knowing more information...
Greg -
Good graph of those hurricanes. Looks difficult to make any conclusions from such a graph. But, I suppose that's the point. I will say, however, that there could be a pinching between the two types of hurricanes listed. Meaning that maybe we're getting STRONGER hurricanes, though not...
With the tools we have today, it is a lot easier than it has ever been before. Teams, Zoom and such are great ways to share screens and have meetings.
My former company used BlueBeam-Revue for all of our drawing markups, so that's all we really needed to communicate.
That being said, I...
I wouldn't think #1. I see a knot close to the extreme fiber on at least one of the beams. Not sure if that's allowed with #1. But, if I hadn't seen that I'd say that it looks like pretty good lumber.
Yeah, my Dad was a prominent "Energy Economist" for much of his career. In his retirement years, he made Global Warming his area of interest. In particular, he talked about this concept. He was talking specifically about "atmospheric carbon" which skyrocketed during the industrial revolution...
Greg -
Yes, these are the quotes that demonstrate the false hype / hysteria related to climate change. That was 24 years ago.
We also had the "world will end in 12 years" comment from AOC. That was 6 years ago. I don't think world CO2 emissions have gone down, have they? Yet, we don't...
You might try contacting the authors. Here's the contact info I could find. Some of this may be out of date:
https://www.linkedin.com/in/robert-bachman-aa052b30/
https://www.iccsafe.org/expert/susan-dowty/
https://www.linkedin.com/in/susandowty/
Back when this option was there I didn't use ETABS all that much. But, I do recall seeing it from time to time.
Looking through the current version, I see a "Verify Analysis vs Design Section" on the Design menu. Isn't that essentially the same thing?
Yeah, if you look at the Seismic codes, you'll see that there are different frequency ranges that determine how the building responds. If the natural frequency is above 33Hz (or a period below 0.03 second) , it is generally considered to have a rigid response.
It's sometimes a little...
Honestly, I feel like this (having grout clean outs) is standard practice that most experienced contractors should have caught really early on.
I haven't worked on very many masonry projects. But, I did do a couple of remodels of existing older building were we used GPR to determine grouting...
Yeah, I see no problem with giving them the pictures. In fact, I would consider it a "best practice" to document the various parts of the engineering investigation that the report is based on. I tend to think that this is the "standard of practice" for most engineering reports.... At least the...
Yeah, I suspect you just didn't properly define your mass source.
If you look in the Manuals folder of your program there should be a "Welcome to ETABS" manual that will have a section that talks at least a little about how to define your mass source.
Coming back to the carbon capture proposal..... Thirty Billion dollars is quite a lot of money for relatively little effect.
Maybe we could spend that money more efficiently by planting trees and re-foresting areas where clear cutting had been done. I think we'll find it likely that plant...
