How to use Method of Joints (Truss Analysis Example)

Learn how to solve trusses using method of joints in this truss analysis example problem.

The method of joints is an analytical method used to determine the forces of each member in a truss. The method is built on the fact that if an entire truss is in equilibrium, then each of its joints are also in equilibrium. It follows that a free body diagram can be drawn for the joints in a truss and analysed using force equilibrium equations on the member forces acting on each joint.

Music by Adrian von Ziegler

[devengoinden]

thank you for the simplicity and conciseness. very helpful!

[mae]

Honestly amazing, this video was a lifesaver for me! Thanks so much for uploading this, covered a concept I've been struggling with & binging countless videos on with ease

[KolawoleMoses-olsp]

very helpful🤛🤛🤜🤜

Please can you tell me the textbook i can use to study more on this type of questions

[sarwarn]

Calculation is wrong. Following Sohcahtoa role in horizontal direction sum F = 500N + FBC cos (45). This because cos45 = adj / hyp = 500/FBC.

[anti-poverty]

Sin is for vertical component
Cos is for horizontal component

[fazriefaiz]

I have the same question as taught but the diagram in the mirror position can I answer as taught or can't change the position

[fifaz]

Thank you so much you really helped me!!!

[markjeffreyederango]

Wow nice.. its an extreme fundamentals it will help..thank you.

[diemdia]

There's one thing I'm confused about and can't seem to find addressed anywhere. Around 2:12 you explain that if your calculation comes back negative, then you made the wrong assumption. But how does the assumption affect the setup? How do you know what sign corresponds to the assumption you've made about tension or compression when you first set up the equilibrium expression? Maybe a dumb question but I seriously can't figure it out

[abdulhanan-vlst]

I have a question @Cowan Academy, when you took Fbc direction toward B then at C shouldn't the force be going away from C towards B.
Hoping for a reply.

[daman]

why did he choose fbc instead of fba in the beginning for Fx?

[zarnoshktk]

tnx and also buddy which softwere is you using iin this video for solving the problem

[INAMmathematicivilengineering]

I am confused at 4:55 you didn't put negative sign with value of F_ bc

[donmk]

Why did he say 500+F_BC*sin(45) at 1:23 and not 500+F_BC*cos(v)? Why use sin and not cos?

[okeniyiayoola]

i was hoping there will be examples on more complex ones

[luketanker]

This still makes ZERO sense, but It gave me something to attempt at lol