Trusses - Method of Joints with Examples

[@drnafie-structuralengineer4620]

For Analysis of Trusses using the Method of Sections, Watch: kzbin.info/www/bejne/rIKWZ4NvlK9llck

[@nadimibrahim1062]

Really helpful

[@matthieu453]

why is there a +10 while calculating Ffg?

[@drnafie-structuralengineer4620]

If you are referring to example 1, we find Ffg by balancing joint f in the X direction. we have 3 forces int he X direction Ffg ( which is to be evaluated), Ffe (which is the 10 KN you are referring to) and teh component of Ffd in the X direction ( 1.41 cos 45). By balancing these 3 forces we obtain Ffg. Ffe ( 10 KN) was evaluated in a previous step I hope this answers your question.

[@faustoabad3387]

In the first Example, why does Ya = 10kn ? and Yb=12kn ?

[@drnafie-structuralengineer4620]

Ya and Yb are obtained using the equilibrium equations. If you take the moment about point B, the equation will be as follows: -Ya x 12 + 9 x 8 + 12 x 4 =0 this gives Ya = 10 KN, then by taking the equilibrium of the vertical forces Ya + Yb - 9 -12 =0 this will give Yb = 11 KN For more information on how to find the reactions watch the following lectures: Reactions- Simple Cases: kzbin.info/www/bejne/m4jYf4N6jtKZmcU Reactions - Advanced Cases: kzbin.info/www/bejne/gHm9e2qOgJl9i5I

[@allehjames7827]

I had issues getting details from the video , try not to include the write up on the screen. It is obstructive

[@drnafie-structuralengineer4620]

What do you mean by the write up? If you mean the subtitles (voice transcript), you can remove it by using the CC button.

[@Charcesto]

Terrible microphone right off the bat

[@drnafie-structuralengineer4620]

Thanks for the feedback. I am aware of the problem and I will try to solve it. Mean while using the subtitles might help you to follow the video.

[@Charcesto]

No peoblem thanks for the video