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- เผยแพร่เมื่อ 17 ต.ค. 2024
- Designing the required size of a steel beam for a propped cantilever condition. Design follows the requirements of the American Institute of Steel Construction (AISC) We take a look at Limit states such as yielding and lateral torsional buckling as well as determining compaction criteria of the web and flanges
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Really well done in showing the step by step process of solving the problem. I do have a question, however. When solving for shear you got 112.5 K. That's .9*Fy*Aw*Cv1, but my understanding was you're supposed to use the 0.6 to make it 0.6*1.0(you corrected this)*Fy*Aw*Cv1 which would be 75 kips. Obviously it still passes, but I'm wondering if I'm missing something here. Thanks!
Scotty ausman your absolutely correct! nice catch. I have shown the equation properly but did not multiply by the 0.6. 75k is the correct shear capacity
Very minor correction: In the (Aw= d*tw) you chose tw as .250 inch which would be for W10*19. W10*15's tw is .230 in which ultimately gives shear capacity at 62 kips. Thank you for doing this. I am trying to get back into steel design and I really appreciate what you're doing.
This was my first video of Kestava, liked and subscribed. I will be learning from your content, so thank you so much!
Welcome aboard, grab a seat in the auditorium and grab some popcorn from the back! Don't let Jose bother you to much.
trying to teach myself engineering. this is a great video been wrapping my brain around steel calculations and I have a steel manual aswell so it works out really well u teaching me like this i can flip threw mine and do the same as you compared to most videos... I start to get confused by all the variables in the equations is there anywhere in the steel manual that tells me what the variables stand for? subscribed!
in the red steel manual check out the symbols section! 16.1-xxvii thanks for joining the team Tom! pumped you're here
THANK YOU VERY MUCH FOR SUCH A GREAT LESSON !!!!!
Glad you liked it!
I enjoyed watching your videos! Happy that i found your channel! Quick question, for flexural members, in what instances do we design using Plastic modulus(Z) versus Section modulus(S)?
Ken that's a really great question that I'll admit I don't have the best answer to so I don't want to blatantly say something incorrect. Let me dive in and get back to you. make sure to remind me!
@@Kestava_Engineering you never answered this question and I also would like to know your answer.
@@intelligentcreations2848 In Canada we have Class 1,2,3,4 sections dictated by the b/2t criteria (at the 7:27 mark, where he talks about compactness...same idea). We use Z for class 1 and 2, S for class 3 (and sometimes for 4). Rich, thanks for the videos!
Refer to Structural Steel Design by Jack McCormac - Chapter 9.
Sir today i have to design a 6 meter cantilever I section for scaffold structure nearly have to take 10 KN at the free end. But the section i got is much bigger, like 457x19... if i tie it with rope at a distance of 1 m from free end, what you will think, it will be a good choice?
Any know how much 10KN is in LBS? (silly American over here)
@@Kestava_Engineering I HAVE DESIGNED IT BY TAKING A UNI I SECTION OF 251.4X146.1X31, ATTACHING A STEEL CABLE OF 24MM AT A DISTANCE OF 1.5 M FROM THE FREE END. THE ANGLE IS VERY FLATE LIKE 24 DEGREE, THATS WHY TENSION IN THE CABLE IS MUCH HIGH. THATS WHY I HAVE TO TAKE A CABLE OF MUCH HIGHER STRENGTH. DEFLECTION IS NOW BELOW 10 MM.
10 KN = 2248 LBS
sir how much load can a *16mm TMT Bar* can hold safely? My weight is 75 KGs, can I hang safely in it? I wanna make a bar for *pull-up* exercise, plz reply...
country lover - if the bar is made of 36ksi grade steel and it is a solid bar (not a pipe) the bar is sufficient for you to use as a pull up bar. I recommend the bar not be more than 1.2m long and that you properly secure the bar at the ends into a strong support system or walls.
very nice explanation and easy to follow Thank you so much
You are welcome!
What would this look like if the left end was a moment connection? they don't have a table for this one in the trusty ole steel manual.
Question - Why Lb is 15 feet if the flange in compression is braced by support and doesn't move out of plane?
Hey Rich, I noticed bf/2tf is 7.41 for w10x15 in the property tables. Just wondering why the length to thickness ratio from table B4.1b calls for b/t and not bf/2tf? You are correct since I have it scratched into my steel manual from coolage, but no idea why b/t is assumed bf/2tf. I also have a scratched in note saying lambda = bf/2tf = b/t in the margins of table B4.1b in case that offers any insight. I just found eqn F3-2 on pg 16.1-49 defines lambda as bf/2tf but nothing further linking lambda to b/t in table B4.1b... wildly unclear to me! Cool job on your videos my man! You have my support, Team Kestava woot woot! -JD
HI! - if you look at the definition of b in tables B4.1 - b is actually 1/2 of bf. thats why they show bf/2tf in the properties section
Hey I just found your channel and I love your videos keep them up. You should do a video series on you designing a building from top to bottom.
ambitious idea, and I absolutely love it. Im working on a better office setup right now and when thats done i think i could pull off recording something like that. stay tuned
Thanks! Weird question. What kind of pen are you using that erases so cleanly?
Frixion erasable pens! they are the only thing I use anymore
@@Kestava_Engineering thanks!
Perfectly done
Keep the good work
Thanks
thank you will do!
Hi, how can I find the area of the steel beams in AISC manual and also how can I find the self weight of I beams in AISC?
Thanks
property tables in the front of the manual - also the second number for a steel WF is the weight per foot of the member!
Why we need to use ASD method for WOOD, is there is any particular reason??
got me there! not sure
Great Video. Thank you sir!
th-cam.com/video/fRyUf-GY754/w-d-xo.html
Awesome... Thanks and many blessings
You are so welcome JR!
Are you for hire to do calculations? I have a project that I'd like to have a 16' clear span for.
Hi Robert, feel free anytime to reach out via email that i provide in my page details / on my descriptions in my newer videos. Lets discuss!
The short cut is that: W10X15 is a compact section.... no need to check it. They are defined on Z tables which one is and which ones not.
Absolutely correct Amir! I always like to show how to determine if an element is compact for viewers so we understand where it comes from. but if your speedier you can check the Z tables as you've said. great addition
Really good, but it is more convenient if you can use the Metric system :), Btw, thanks for sharing.
GASE - I will get a few videos up using the metric system! I've done work overseas before so ive had to use the metric system but im no pro!
Great video sir, You should get into continuous and isolated footings design
Hi Jesus - great idea, i do have a 2 part isolated footing example in my concrete playlist! I should update and do a continuous footing design. thanks for your suggestion!
Hi, can you make a Video on Joist Girder Design?
is there any chance to get that book i would apresciate any info tanks,
Hi Carlos, unfortunately I cant send the code to you as it would breach the AISC's policy. sorry about that!
Hi, how can I get the manual book online for free?
Thank you
not sure unfortunately :(
will you please add videos about how to design connections
yes MAY!
I NEED THAT STEEL MANUAL. CAN ANYONE HELP ME TO GET IT ? I AM FROM BANGLADESH.
great video
Thanks!
How would you design a beam that has a cantilevered slab attached to it? The beam in question would act has a header in a wall and have a pergola cantilevered from it. thank you in advance..!!!@@Kestava_Engineering
Thanks, you are the best
no may you the best! and yes I can do connection examples!
Nice tutorial sir. i also make videos on structural engineering.
Awesome to hear! we need more channels out here trying to help out with those who wanna learn. I'll check your channel out now!
@@Kestava_Engineering Yes sir. We definitely need.
Dear sir can you send the pdf book
unfortunately I cannot due to licensing rules. my bad Dheeraj!
tnx
th-cam.com/video/fRyUf-GY754/w-d-xo.html
no problem Desi!
man i have no idea why i have this on my recommended
youtube knows best Zach, your path has been decided for you. welcome to team kestava and the world of structural engineering my man