Truss analysis by method of joints: worked example #1

Рет қаралды 823,503

8 жыл бұрын

This engineering statics tutorial goes over a full example using the method of joints for truss analysis. You first need to solve for the reaction forces by drawing a FBD of the entire structure. Once you have the reactions, you then need to draw a FBD of every joint. It’s the standard convention to draw unknown forces in tension, so that if you get a positive value for their magnitude, you know you have correctly assumed tension, and if you get a negative value, it just means that the member is in compression. Once you calculate an internal force in a member, it will be a known value for the next joint it touches. So if it’s found to be in compression, then just draw it in compression when you do the next FBD (meaning it’s pushing on the joint rather than pulling on it).
There is a typo in this video: The truss is 0.866m tall, not 1m. It's 1m*sin(60)=0.866m. Doesn't actually affect anything in the problem, it was just labelled wrong.
If you found this video helpful, please consider supporting my work on Patreon:
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Looking for more statics tutorials? Check out all of the videos that I made:
KZfaq: • Dynamics
Website: www.engineer4free.com/statics
Looking for practice problems with solutions? I also created a whole set of fully solved statics problems with step-by-step hand calculations:
www.engineer4free.com/statics...
Looking for software? I highly recommend checking out SkyCiv. They make a full suite of online structural analysis software and tools that are useful for both students and professionals, including calculators for beams, trusses, frames, moment of inertia and more. It’s great for checking your work:
bit.ly/skyciv-e4f
Lastly, don’t forget to subscribe on KZfaq and join the Engineer4Free mail list:
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Thanks for watching, I hope it helps!

Пікірлер: 704

@justind5742 5 жыл бұрын

What am I even going to college for? lol. You explained analysis of trusses better in 15 minutes than my prof did in 2x 2 hour lectures

@Engineer4Free 5 жыл бұрын

That's a good question.

@papess690 5 жыл бұрын

College? Is for us to know that there are many things we don't know...

@the_candid_mechanic 5 жыл бұрын

That's true

@anuragexploration212 4 жыл бұрын

what if do not change directions of truss at any specific joint at all(in other words leave all forces at every joint going outwards(tensile) no matter what and just while substituting the force while solving the next joint put a minus sign i.e if got a force as compressive the ans is -ve so instead of changing the direction of force just substitute the given -ve force directly while solving next joint.

@lingeswwarannedunsezian1697 3 жыл бұрын

How to calcute the reaction at support(im not sure whether its positive or negative)

@kevinnarine1106 3 ай бұрын

Very helpful. This chapter has been the hardest for me yet and I believe I finally have this stuff figured out. I appreciate you explaining the "why" aspect of what you're doing rather than assuming that the audience knows as much in Statics as you do. I think some professors need to remind themselves that this stuff is going to be obvious to them when they've been doing this stuff for 20+ years, and not so obvious for the students learning this for the first time.

@Engineer4Free 2 ай бұрын

Yessss glad that my explanation worked. What you described is exactly what I try to accomplish in the videos. Cheers 🤜🤛

@veniaminnossov4929 2 жыл бұрын

This is the one topic I have struggled to grasp and you sir have explained it and presented it flawlessly. I cannot thank you for how much you have improved my chances of getting a better grade.

@Engineer4Free 2 жыл бұрын

Thanks for letting me know Venya.. really happy to hear that I could help!! I made several other truss and statics videos here: engineer4free.com/statics =)

@shanehew2373 7 жыл бұрын

Best "method of joints" tutorial I could find on youtube. it really helps thanks for sharing. I hope u r doing great wherever you are now.

@Engineer4Free 7 жыл бұрын

Thanks for the kind words Max! Hope you are doing great too :)

@Rino10493 7 жыл бұрын

+Engineer4Free I also agree! Thank you so much for helping me

@muhammadazrul3055 2 жыл бұрын

True

@starboii568 4 ай бұрын

Is the same true if i get -350 for my ay?

@Freakybananayo 5 жыл бұрын

Very clean presentation, straight to the point, no time wasted drawing all it out in real time. very useful video

@Engineer4Free 5 жыл бұрын

Yo Freaky Banana, thanks for the feedback...glad you like it =)

@SnapToothbrush2 3 жыл бұрын

I’m in the middle of taking my final and I think it’s safe to say you’ve saved my grade i wish you were my professor

@Engineer4Free 3 жыл бұрын

Thanks!! Glad you like the video. Also.... you are in the middle of your final and on YT? Zoom University lol

@ralff4272 3 жыл бұрын

I am so doing this tomorrow lol

@himanshukumarsingh8234 4 жыл бұрын

this is the best video on KZfaq for the analysis of truss, short, simple, straightforward, clean, exact and has got the best explanation. Thank you so much for the amazing video.

@Engineer4Free 4 жыл бұрын

Thx bro. Please share my vids with some other classmates!

@himanshukumarsingh8234 4 жыл бұрын

@@Engineer4Free sure, will do the same

@HazzCraft Жыл бұрын

my mans a literal life saver, amazing work diving into topics specific to an engineering course. you explain it heaps better than my lecturers with thick accents and the long tangents they go in mid class

@luuhax 2 жыл бұрын

I missed the exam last year for this topic, and now when I'm about to retake it I knew i could just come back here to refresh my memory. Excellent video

@brightappiah3581 3 жыл бұрын

This video has really explained things to my understanding. In fact I'm speechless. This video has just made me pass my elementary structures tomorrow... I'm really grateful

@Engineer4Free 3 жыл бұрын

Amazing!!! Thanks for letting me know!!! If you have more left in the course, you might want to check out the other examples @ engineer4free.com/statics =)

@christianfekete Жыл бұрын

Very good demonstration, thank you d’or sharing. With your nodes analysis this covers it all. So helpful!

@miliamokhtar4506 4 жыл бұрын

Thank u so much for teaching this for free! I watched most of ur videos whenever i hv trouble understanding something and in need of more examples to solve a problem. Theyve helped me a lot and u make it so easy to understand 😁

@Engineer4Free 4 жыл бұрын

Awesome!! Thanks for the great feedback 😁😁

@s.amirmohammadhassanli9890 7 жыл бұрын

Hi :-) Thank you for your time to making this video! this is really helpful!!! I hope u r doing great wherever you are now ;-)

@TeaRFrost 3 жыл бұрын

This is hands down the best video I have ever seen . Thank you!!

@Engineer4Free 3 жыл бұрын

Wow, thanks Aaron! =)

@gauteantonsen3907 7 жыл бұрын

Best "method of joints" tutorial I could find on youtube!

@Engineer4Free 7 жыл бұрын

Thanks man! That's awesome to hear!!

@Jesssuuusss_. 2 жыл бұрын

This is the best KZfaq I've ever watched.. Wow...you got good stuff

@painteur8169 4 жыл бұрын

i have to say this is the best lesson out of the south sahara , you explained a whole 4 hour lecture in two simple videos , ps ive subscribed to the channel and ready for more engineering videos

@Engineer4Free 4 жыл бұрын

Awesome, thanks Kelvin!!! =) =)

@gauravnerkar2982 7 жыл бұрын

Thanks sir for this great tutorial on 'The analysis of Truss'.... because of you I got the simple method to solve problems without any confusion....

@Engineer4Free 7 жыл бұрын

Glad to hear it man! Thanks for watching, and if you haven't seen the rest of my statics tutorials, then do check them out at engineer4free.com/statics :)

@RAZZ_ARCH 11 ай бұрын

You explain better than my uni Lecturer will do in 1hr without even hearing him not to talk of understanding how he's going about it Thanks so much

@cellerysandwich 2 жыл бұрын

clear and straight to the point. amazing explanation.

@Engineer4Free 2 жыл бұрын

Thanks for watching!!! =)

@davidmuniz5307 5 жыл бұрын

Your explanation made these problems much easier to solve. Thanks

@Engineer4Free 5 жыл бұрын

Thanks for letting me know David, cheers!

@anishahasnat2837 Жыл бұрын

omg. finally a video that actually makes sense. youve made this so easyyyy. oh god thank you so much

@themansans1929 4 жыл бұрын

This... this is amazing. You just earned another sub!!

@Engineer4Free 4 жыл бұрын

Awesome!! Welcome 😊😊

@mrmoeguy4664 2 жыл бұрын

This video is always a life saver the night before exams

@kvthe2nd903 4 жыл бұрын

You literally saved my day, thankyou! I've been told this 3 times before but didnt understand it.

@Engineer4Free 4 жыл бұрын

Really glad I could help. Check out all the videos I did at engineer4free.com/statics , I have a few more on this method there too

@danargumelarinc9660 5 жыл бұрын

This is totally a breakthrough .... Good job.

@Engineer4Free 5 жыл бұрын

Awesome!! Make sure you check out the rest of my statics vids at engineer4free.com/statics , the truss videos are numbers 42-51

@sterioboy676767 9 ай бұрын

Thank you so much, literally saved me from hours of frustration.

@aliyubabamohammed7532 4 жыл бұрын

yo thanks a lot at first I wasn't understanding then later I actually did understand keep doing your thang god bless

@Engineer4Free 4 жыл бұрын

Word glad to hear it. Check out all the truss videos at engineer4free.com/statics if you haven’t already, they are numbers 42-51 ✌️

@GHOST84559 Жыл бұрын

Thank you very much.....God will surely bless you for helping us understand My problem was the direction of the forces in the members at first and now you've helped me understand it I'm Soo happy ....thanks!

@CreatorFlex 6 жыл бұрын

watched this legit 20 minutes before my exam and it helped so much

@Engineer4Free 6 жыл бұрын

Glad to hear it! Now you know where to come before your next exam too

@JohnDiggle21 3 жыл бұрын

I have a solid mechanics exam today and this just helped me understand this topic so quickly! Thanks!

@Engineer4Free 3 жыл бұрын

Good luck!!! Plenty more vids btw at engineer4free.com/statics and engineer4free.com/mechanics-of-materials 👌

@anask4052 Жыл бұрын

i got one in 3 days lol

@JohnDiggle21 Жыл бұрын

@@anask4052 good luck

@mateusz4611 3 жыл бұрын

My man just explained this better in 15 min than my lecturer managed to in 5 hours.

@Engineer4Free 3 жыл бұрын

😏

@thomasrichardson504 2 жыл бұрын

Honestly mate, you're a legend!!!!!!

@nanuar6213 7 жыл бұрын

THANK YOU FOR MAKING THIS VIDEO, IT HELPED ME A TON!

@thinalnim 3 жыл бұрын

so neatly explained :) thank you sir!

@Engineer4Free 3 жыл бұрын

Most welcome!!! More truss vids @ engineer4free.com/statics =)

@rousrudolfraemona.3898 3 жыл бұрын

Auto subscribe, this tutorial so far is the best for me. Thank you sir!

@Engineer4Free 3 жыл бұрын

Thanks for the sub!! =)

@lilJazza360 6 жыл бұрын

You just saved my exam for tomorrow, god bless you

@Engineer4Free 6 жыл бұрын

Awesome, glad to hear it! How did the exam end up going?

@cosmicdust5436 4 жыл бұрын

and here i am ..saved for my exam for tomorrow..LMAO

@youssefwalid5163 4 жыл бұрын

u saved me for tomorrow's exam too lol

@danieldelgado5235 3 жыл бұрын

@@Engineer4Free I guess we’ll never know

@human2373 3 жыл бұрын

got a test tomorrow too lol

@kamohelorantso1964 5 жыл бұрын

Thank you for the good job. you made the course simpler for me

@Engineer4Free 5 жыл бұрын

You're welcome Kamohelo, I'm glad I could help you 🙂

@amolmadhale35 3 жыл бұрын

I've got it clearly, thank you very much.

@Engineer4Free 3 жыл бұрын

Great!!! Thanks for letting me know =)

@sussy_61 3 жыл бұрын

this guy explained it better than my lecturer, thanks man

@Engineer4Free 3 жыл бұрын

You're welcome, thanks for watching! Check out the full playlist at engineer4free.com/statics 👌

@krystalwhispers 3 жыл бұрын

Well hats off to Engineer4Free for still replying to comments and keeping people updated even after 4 years. You're amazing

@Engineer4Free 3 жыл бұрын

Thanks Atharva! Still trying🤜🤛

@aafaqkhan9565 4 жыл бұрын

It feels like i have wasted my whole semester classes by listening to boring professor. Many Thanks for saving my paper. Cheers!

@Engineer4Free 4 жыл бұрын

Sorry to hear, but you’re not alone. Glad I could help 🤜🤛

@Engineer4Free 4 жыл бұрын

Sorry to hear, but you’re not alone. Glad I could help 🤜🤛

@MyCuteSchool 5 жыл бұрын

oh my god, this is so so helpful. Thank you so much

@Engineer4Free 5 жыл бұрын

You're welcome Phạm!

@khoiphan7967 Жыл бұрын

this is really help, thanks for the lession sir

@ahmedkere-ahmed9594 11 ай бұрын

Thank you very much for the in-depth explanation

@Engineer4Free 11 ай бұрын

Glad it was helpful! thanks for watching =)

@nigel8221 4 жыл бұрын

Grear refresher for me since we've been in quarantine here in the Philippines for about 2 months now, I forgot my statics😂, I'm now in my Deformable, I'm trying to remember how to solve indeterminates using stress/strain. GOOD WORK SIR THANK YOU🙏

@Engineer4Free 4 жыл бұрын

Glad I can help!!! Keep it up my friend 🤜🤛

@Engineer4Free 4 жыл бұрын

PS I’ve got tutorials on indeterminates in these other courses: engineer4free.com/mechanics-of-materials and engineer4free.com/structural-analysis ... if you haven’t seen them already!

@BughawKapital 4 жыл бұрын

Wow thank you i've always been confused with what arrow to draw thanks a lot 💯🙏

@Engineer4Free 4 жыл бұрын

Awesome, glad I could help! You can check out all the statics videos I did over at engineer4free.com/statics if you haven't already, I have a whole section on trusses

@allan4775 4 жыл бұрын

Your video helped a lot, thank you!

@Engineer4Free 4 жыл бұрын

Awesome Allan, glad I could help!! 🙂

@zaredkaunajnr3972 5 жыл бұрын

Thank you Sir, this video was so helpful.

@Engineer4Free 5 жыл бұрын

Awesome thanks for the feedback =)

@sahilahuja6933 Жыл бұрын

thank you for this and saving me for my final coming up!

@darrylros681 3 жыл бұрын

this tutorial explains everything I cant learn in school, I dont know why some teachers in universities dont have this kind of talent when it comes to teaching.

@Engineer4Free 3 жыл бұрын

Thanks Darryl! In case you haven't seen the rest of the playlist too, its here: engineer4free.com/statics There are more truss tutorials in videos 42-51👌

@darrylros681 3 жыл бұрын

@@Engineer4Free Thank you! 💙

@Thomas-qi7hx 5 жыл бұрын

Great tutorial, thank you.

@Engineer4Free 5 жыл бұрын

Thanks Thomas!

@emmanmismanos6694 3 жыл бұрын

man, you're a life saver!

@Engineer4Free 3 жыл бұрын

Happy to help! You should check out the rest of the statics vids I did here too: engineer4free.com/statics =) =)

@jonathansimbuwa9379 9 ай бұрын

Thank you sir,that has really helped ❤❤👏👏💯

@superslayer7040 4 жыл бұрын

Well this helps can’t wait to learn more when I’m done middle school

@Engineer4Free 4 жыл бұрын

Keep on it!!! 🤜🤛

@syarikamaruddin6462 4 жыл бұрын

thankyou, you're a lifesaver.

@Engineer4Free 4 жыл бұрын

You’re welcome Syari!!!!!

@ahmedothman6642 3 жыл бұрын

this guy is always saving me in the day before the exam, god bless you brother

@dram906 3 жыл бұрын

when I did sin60 my ti-84 gives me -.3048 is there a reason our numbers are different?

@ahmedothman6642 3 жыл бұрын

@@dram906 maybe ur calculator, reset it because sometimes its on radian system change it to degree

@dram906 3 жыл бұрын

@@ahmedothman6642 thankyou got it now!

@ahmedothman6642 3 жыл бұрын

@@dram906 no need, good luck

@dellpi3911 3 жыл бұрын

kzfaq.info/get/bejne/nLipiMlerL-bZWg.html

@NameLoading Жыл бұрын

Simple and effective!

@amroal-obidi4160 2 жыл бұрын

good video helped me understand

@ShashankMBW 7 жыл бұрын

Thanks a lot for this tutorial!

@Engineer4Free 7 жыл бұрын

Thanks for commenting!!

@brandondickerson9922 6 жыл бұрын

Great video! Helped me alot on my exam.

@Engineer4Free 6 жыл бұрын

Awesome really glad to hear it!!! Thanks for letting me know :)

@josefleonard4027 7 жыл бұрын

this is real helpful,thank u for sharing

@Engineer4Free 7 жыл бұрын

+josef leonard glad to hear it, thanks for watching!! You can find the rest of the statics videos I made here engineer4free.com/statics

@iinblegur3282 3 жыл бұрын

Thank you so much for your explain.. It's really help me to understand.

@Engineer4Free 3 жыл бұрын

Great, glad to hear that!! You can find all of the other statics videos that I did here: engineer4free.com/statics

@lukecollinson4327 3 жыл бұрын

Excellent video, thank you so much :)

@Engineer4Free 3 жыл бұрын

You're welcome!!

@blazientco3889 6 жыл бұрын

Thank you so much for making this video,

@Engineer4Free 6 жыл бұрын

You're welcome, thanks for watching!

@mitchellberends103 3 жыл бұрын

You are the best saved me alot of time

@Engineer4Free 3 жыл бұрын

Awesome!! Check out engineer4free.com/statics for the rest of the statics videos =) =)

@ishmaelbockarie5859 26 күн бұрын

well explain , thank you.

@datguy8805 5 жыл бұрын

Oh my god thank you, i get it now, a little more clear but just as tedious, thank you

@Engineer4Free 5 жыл бұрын

You're welcome =). Method of joints is always tedious. It's the worst when you get to the end and it doesn't add up, and you then know there is a math problem buried in all the calculations some where!

@saketpandey18 3 жыл бұрын

Thanks a lot this video helped me a lot in understanding joint method. Love from India. You are doing a great job.

@Engineer4Free 3 жыл бұрын

Thanks Saket!! I have more tutorials at engineer4free.com/statics see #42-51 for more truss examples👍

@saketpandey18 3 жыл бұрын

@@Engineer4Free You are welcome. I will surely watch those videos. I have issue with section method

@Assam-bt1dl 7 жыл бұрын

thank you very much sir... I find this as best method for doing problems... thanks again.. ☺☺

@Engineer4Free 7 жыл бұрын

Glad to hear it! Thanks for letting me know :)

@alexandertsoi5082 2 жыл бұрын

Thank you for existing used this to study

@abinavvijay3572 Жыл бұрын

Thank you so much bro

@orianx 7 жыл бұрын

Thanks for this 😊

@sathiyanarayanan7245 5 жыл бұрын

Excellent work keep doing ..

@Engineer4Free 5 жыл бұрын

Thanks Sathiya!

@hhhhhhh817 3 жыл бұрын

Great video, thank you.

@Engineer4Free 3 жыл бұрын

Glad you liked it! Do check out the rest of the playlist at engineer4free.com/statics =)

@maxmelon 6 жыл бұрын

great work man

@Engineer4Free 6 жыл бұрын

Thanks for the feedback Madan! :)

@goddymakele4158 5 жыл бұрын

Best tutorial accesible thanks

@Engineer4Free 5 жыл бұрын

Thanks Goddy, means a lot =) =)

@pioltupachnyok6589 Жыл бұрын

Thanks sir, you video is really helpful

@yhiingorlanes3368 3 жыл бұрын

Thank you for this. ❤

@Engineer4Free 3 жыл бұрын

You're welcome

@elijahcholayiik1794 2 жыл бұрын

The best methods of joint you real elaborate whoever coming to cross these tutorial, the easy way of getting all forces acting at X-direction and Y-direction just you need to dismantle the Truss by FBD

@the_candid_mechanic 5 жыл бұрын

Superb video Sir....Hats off..

@Engineer4Free 5 жыл бұрын

Thanks!!! =)

@freserlyn1 4 жыл бұрын

Wow. This is much understandable than my 2-hour class. I hope you’d do videos in all my engineering subjects too. Hahaha Thanks!

@Engineer4Free 4 жыл бұрын

I'm working on it! Check out engineer4free.com for all the courses, new vids and courses are always being added!!

@adegboyepromise4683 9 ай бұрын

You just explained in 15mins what engineer hamzat couldn't make me understand in 2years ...hamzat

@MissPiggyM976 Жыл бұрын

Many thanks, it was very useful !

@Engineer4Free Жыл бұрын

You are welcome!!! =)

@zeeshansaifi713 7 жыл бұрын

it really helps thanks for sharing

@Engineer4Free 7 жыл бұрын

Thanks for watching!

@ReihaAli 5 жыл бұрын

YOU ARE AMAZING! Why didn't I find you last year! 😭

@Engineer4Free 5 жыл бұрын

ahaha SORRY I don't know, but thanks!! =). Maybe tell some friends that could use the vids too so they don't miss out ;)

@samyakkothari3829 3 жыл бұрын

Well explained!

@Engineer4Free 3 жыл бұрын

Thanks!! =)

@Akileshg1 5 жыл бұрын

Thank you very much , understood it easily~!

@Engineer4Free 5 жыл бұрын

Great thanks for letting me know =)

@Akileshg1 5 жыл бұрын

@@Engineer4Free After this tutorial I solved all problems from GATE exam correctly! All!

@Engineer4Free 5 жыл бұрын

That's incredible!!! Good job 😁😁

@marshalleriksen3164 4 жыл бұрын

PLS POST MORE CONTENT, RELYING ON U TO SURVIVE THROUGH MY COLLEGE !!! MUCH THANKS! Able to post content such as Autocad/Solidworks tutorials, Python and other contents like engineering materials pls. Much thanks! U're a lifesaver

@Engineer4Free 4 жыл бұрын

Working on it!! Check out all the courses I've completed so far at engineer4free.com 👌