Hello CEE, Thank you for this quick (yet comprehensively detailed) run-down, it does help a lot with focus. 10:48 and 11:41 Indeed it is kind of good to read 😊. Baby CEE is definitely going places with such an excellent intuitive choice. I actually also prefer option 1 and for the same reasons that were articulated here by the CEE. Simplicity can significantly increase compliance. I have enjoyed this this video and I am looking forward to the next CEE videos Keep well and here’s to the joy of all the little things in life, always. DK
Sketching prior to design is important. Base fixity or pin support is important to both the frame and the foundation. Thrust needs to be accounted for during sketching and design and drawings. A reminder list can help. Horizontal and vertical loads. Your building supplier should provide load cases too.
I 100% agree with your point. Just to clarify, by building supplier you mean the stakeholder/owner, right? One thing I want to add is: the engineering team may be also responsible for parts of the load. For example, wind loads are calculated by the designer (us). Also, we may need to find the "type" of crane needed for the warehouse, if a crane is to be used there. it is a "scope of works" issue. But your answer is very important and I totally agree. For pin vs fix, oooooh this is a long discussion, I think I have a video talking about it. Regards, CEE
Dear Dr. C E E, thank you very much for your sharing! if you can share deep guiding more about which one is fix base plate and which one is pin, it's good for young Engineer like me. 🙏🙏🙏
Long time ago, I proved that the plastic design for portals is a short seeing idea which does not apply everywhere. If you consider a single span, the gain of reducing a bit of steelwork is much less than the extra purlins, so supply, fittings and detailing you have to provide to fulfill the requirements. 100mm longer haunch was much cheaper option. Perhaps in countries where material is very expensive it could work.
Hi there, To be honest, I agree with you. If you want to design stuff towards full plasticization (including hinges), more details with regard to stabilization as you mentioned are needed. Furthermore, so that all our viewers benefit, it is to be mentioned that it is exactly those little fittings, connections, details and so on that will drain workmanship. Depending on the country, the hourly wage of skilled workers might be really significant that - as you mentioned - any saving in steel weight would be offsetted by this. Thnx a lot for your comment, it helps the community a lot. I am really thankful. Stay tuned for more content, CEE
Dr.CEE We talk before about the pin and fixed support and i think that it's the first time that I have seen someone who explained well and really identify the reallity of this kind of support . Thank you , you are helping me to advance my engineering skills and analysis. ENG. Ali Omar .
It honors me to hear that. Yes, Pin and fixed is not only an "engineering opinion". There is an underlying assumption so it is important to mention. Regards, CEE
Food for thought at 18:36 : Along the passive earth pressure, we could consider adding the friction between the foundation base and the soil as well (before considering exceptional solutions, like those underground rods you illustrated). Am I wrong? 🤔 Of course if the code permits it - maybe there are places in the world where certain soils are more strict than I could imagine 😬
Yes. You are right. You could actually consider the friction and cohesion of the soil in the resistance of the horizontal forces Plz note that this is a "General answer" but you have to abide by your local code Great point actually, for some reason it did not occur to me. Thnx a lot, Regards, CEE
if you provide a hole in the eaves column, it means you have a bracing that goes through the hole in all columns to brace them against lateral movement. just 1 alternative. You can find more info on the steelconstruction.info website. It is really a golden website to check. (Not sponsored, I do not own it)
Hi there I am happy you like the vids. Now my guess is because usually codes give you an (easy out) by allowing the usage of linear analysis in most (practical) cases. But of course if you go to the academia side of things, it is exactly the opposite. In research, we deal with 2nd effects solely 👍
Hello CEE,
Thank you for this quick (yet comprehensively detailed) run-down, it does help a lot with focus. 10:48 and 11:41 Indeed it is kind of good to read 😊.
Baby CEE is definitely going places with such an excellent intuitive choice. I actually also prefer option 1 and for the same reasons that were articulated here by the CEE. Simplicity can significantly increase compliance.
I have enjoyed this this video and I am looking forward to the next CEE videos
Keep well and here’s to the joy of all the little things in life, always.
DK
Hi there Engr. DK,
I am really happy you liked it. Currently preparing the next videos for this weekend, so stay tuned for them ^_^
Regards,
CEE
Sketching prior to design is important. Base fixity or pin support is important to both the frame and the foundation. Thrust needs to be accounted for during sketching and design and drawings. A reminder list can help. Horizontal and vertical loads. Your building supplier should provide load cases too.
I 100% agree with your point. Just to clarify, by building supplier you mean the stakeholder/owner, right?
One thing I want to add is: the engineering team may be also responsible for parts of the load. For example, wind loads are calculated by the designer (us). Also, we may need to find the "type" of crane needed for the warehouse, if a crane is to be used there.
it is a "scope of works" issue. But your answer is very important and I totally agree.
For pin vs fix, oooooh this is a long discussion, I think I have a video talking about it.
Regards,
CEE
Dear Dr. C E E, thank you very much for your sharing! if you can share deep guiding more about which one is fix base plate and which one is pin, it's good for young Engineer like me. 🙏🙏🙏
You are most welcome. Stay tuned for more content.
Long time ago, I proved that the plastic design for portals is a short seeing idea which does not apply everywhere. If you consider a single span, the gain of reducing a bit of steelwork is much less than the extra purlins, so supply, fittings and detailing you have to provide to fulfill the requirements. 100mm longer haunch was much cheaper option. Perhaps in countries where material is very expensive it could work.
Hi there,
To be honest, I agree with you. If you want to design stuff towards full plasticization (including hinges), more details with regard to stabilization as you mentioned are needed.
Furthermore, so that all our viewers benefit, it is to be mentioned that it is exactly those little fittings, connections, details and so on that will drain workmanship. Depending on the country, the hourly wage of skilled workers might be really significant that - as you mentioned - any saving in steel weight would be offsetted by this.
Thnx a lot for your comment, it helps the community a lot. I am really thankful.
Stay tuned for more content,
CEE
Dr.CEE
We talk before about the pin and fixed support and i think that it's the first time that I have seen someone who explained well and really identify the reallity of this kind of support .
Thank you , you are helping me to advance my engineering skills and analysis.
ENG. Ali Omar .
It honors me to hear that. Yes, Pin and fixed is not only an "engineering opinion". There is an underlying assumption so it is important to mention.
Regards,
CEE
Thanks!!
You are most welcome. Stay tuned for more content.
Food for thought at 18:36 : Along the passive earth pressure, we could consider adding the friction between the foundation base and the soil as well (before considering exceptional solutions, like those underground rods you illustrated). Am I wrong? 🤔
Of course if the code permits it - maybe there are places in the world where certain soils are more strict than I could imagine 😬
Yes. You are right.
You could actually consider the friction and cohesion of the soil in the resistance of the horizontal forces
Plz note that this is a "General answer" but you have to abide by your local code
Great point actually, for some reason it did not occur to me.
Thnx a lot,
Regards,
CEE
you are the best
Most welcome 🌹
thank you
You are most welcome 👍
hello there
can you share a link for a pdf for the design of steel structures according to AISC
Here is a reference from william Segui:
civilenglineering.wordpress.com/wp-content/uploads/2014/10/steel-design-4-edition.pdf
Thanks. On connections design why do you provide a hole on the eaves column
if you provide a hole in the eaves column, it means you have a bracing that goes through the hole in all columns to brace them against lateral movement.
just 1 alternative. You can find more info on the steelconstruction.info website. It is really a golden website to check. (Not sponsored, I do not own it)
Thanks for videos. Plastic hinges, stability of the frame and second order effect are myht for designer no one wants to touch why is that?
Hi there
I am happy you like the vids.
Now my guess is because usually codes give you an (easy out) by allowing the usage of linear analysis in most (practical) cases. But of course if you go to the academia side of things, it is exactly the opposite. In research, we deal with 2nd effects solely 👍