ฝัง
- เผยแพร่เมื่อ 6 ก.ย. 2024
- Team Kestava tackles a PERFECTLY SPLENDID snow drift example for a simple structure. Kestava shows how to determine ground snow loading criteria and how to convert into roof snow loading for a structure all under the guidelines of the ASCE 7-16 building code.
SNOW LOAD CRITERIA IS SOMETHING EVERY STRUCTURAL ENGINEER NEEDS TO KNOW... unless your Florida man, then... keep doing you
Then we devour calculations for drift snow loads along the parapets of the structure. we walk hand in hand through the ASCE 7-16 provisions and get confident in our abilities to successfully determine snow loading criteria for our structures!
want that good Facebook life 👇
www.facebook.c...
#structuralengineer #Kestava #ASCE
![Megan Thee Stallion - Neva Play (feat. RM) [Official Video]](http://i.ytimg.com/vi/TpYTyAaTRts/mqdefault.jpg)
perfectly splendid... yall know
I appreciate your channel. I just started a new job as a Structural Design Engineer after being out of the field for a while. I found this channel and it has been great for getting me back on track. I see asce 7 22 is changing how snow loads are done. Its actually the guy who taught me steel design in college that is heading up that snow load change: Michael O'rourke. Makes me feel better about my college education? I just need to rekindle that knowledge base. One thing i find odd is the .7 for ground to roof. If you had a roof that was 1 sqr mile, surely the snow would be the same on that flat roof as it would be on the ground. The whole thing of determining what load to put on a building is quite fascinating to me.
Dude you're freaking amazing. Checking some calcs and have never done Snow Drift before. i actually learned this beyond what i just needed to know to check, by watching your vid. 💛
Glad I could help!
Thanks for the great content! I am having a hard time interpreting ASCE section 7.3.4 "Minimum Snow Load for Low-Sloped Roofs" would Pmin even be a design consideration for this example building? The language states "...shall only apply to monoslope, hip, and gable roofs" In your example the roof system used is neither of these. Any thoughts on the interpretation?
Thank you very much! this was very helpful.
Kesteva you are amazing! I've been looking everywhere for a good explanation. I didn't find any one like you. You are intelligent and I got all my knowledge from your videos! Recently I am studing for a masters in structure eng.
So please keep making more videos!!
ZOZO you just made my day! thanks for the compliment, but I'm just like the rest of you, learning more about structural and civil engineering one day at a time. thanks for the support and spread the word!
Thanks for the great example!
My pleasure Andrew!
Thank you
The 30 pcf value in your problem from CH 7 is a max required if you calculate more, not a minimum. If you come up with 16.6 pcf density load, you should use 17 pcf in my opinion, the point is, that 30 psf is not a minimum to analyze vs the calculated density.
hi Don! I've been loving the feedback. I believe I did take the 16.6pcf in this case, but i agree i was a little incorrect on my verbal teaching. the density never needs to be greater than 30pcf per ASCE 7-16 equation 7.7-1.
SO GOOD
The greater of leeward drift and windward drift is used in design. Only windward drift is considered for parapet.
Fantastic video! Question... As a code professional, I can only enforce minimum not best practice. That said, I know drift loading should be accounted for in a building design but is there language that requires it to be accounted for?
welcome to the channel! your expertise is always welcome here. short answer - yes. the IBC has loading criteria for snow but heavily relies on the ASCE 7. the ASCE 7 mandates that engineers design structures for drift criteria as outlined in their pages.
@@Kestava_Engineering I'll have to take a look when I get back in my office. I don't normally need to spend a ton of time in ASCE 7-16 other than as a reference if something looks off like a snow load reduction that appears a bit too reduced haha. I'll have to track down the path. Thanks!
hello, how should the snow load be calculated on multi span roofs? I couldn't find anything about it in asce7-16. Should it be calculated by the Sawtooth Roof division?
Thanks :)
great bud , could you please do special moment frame design process ,as its done in office
Thanks for your work
I can add that to the list Shams! I have an ordinary moment frame problem lined up first.
Hi Kestava , if this is flat roof and surrounded by parapet the drift can happen from any side of parapet wall , so the question is if the beam along the width is 20ft , continuously so can we consider the Max40.psf through out the without dividing into parts and Triangle loads.... , i mean if whats your next step for designing a beam for this load consideration in practice
Thanks
Shams, just designing for the highest concentration of snow drift across the entire roof would work, but it would be incredibly over designed. we should always be trying to minimize our designs per the provisions of the codes we follow. but in short, yes you could do that. great question!
@@Kestava_Engineering Thanks, how and which part of the code helps to minimize the load in this case, i was thinking for being neoconservatives to consider 12.6psf as udl and 40.2psf triangle load for 6.64ft length on each side for 20ft beam and find Max moment and shear and proportionate the section.
Thanks
Love your topics and examples.
Does snow load matter in Texas?
Hey Matthew, looks like there are parts of Texas that can gat a Pg of 20psf! however MOST of Texas you dont need to design for snow loads! great questions, keep them coming my man.
Thank you 🌹
You’re welcome 😊
First of all, thank you for your excellent explanation. Sorry in advance for my bad english. If you have projects made according to Asce 7-16 and reports of these projects, can you share them with me? or if you direct the projects to an address where I can download them, I will be very happy. Thank you from now. Best regards...
unfortunately they are private projects and I cannot give out that information :(
@@Kestava_Engineering sir, it just needs to be an example. Please. You can scribble the areas you deem important. just a few steel structures and reinforced concrete structures projects as an example. I can't find sample project and account report
How about eliminating the ado, and eliminate the need to say “no further ado”.
How do i plug in the snow drift triangle into a load combination to factor the load?
hi there, whatever your values are in your calculation you just multiply them by whatever your load combination factor is for snow. thats it!
@@Kestava_Engineering thank you!!