Trestle Truss Graphic Analysis

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Analysis of a truss by graphic statics. Reactions computed by moment analysis.

NOTE: This video intentionally has no sound and has been sped up by 50%. This is intended for study and reflection, inviting the student to study the steps more intently.

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Before you complain about not having audio, please read the note above. This video INTENTIONALLY has no sound. If you can't follow it, then go back to the basic videos. Once you know the procedure, this will be clear. I have plenty of other examples WITH sound if you need it. No sound forces you to look closely. Also, as one viewer noted, I made a sign mistake with the horizontal 5 kN force in the reaction calculation, but the final result is correct.

professordeb

Agreed sound is not critical. But there are some areas where sound would help, those areas where students typically have problems. Not reasonable to say look at earlier examples. Overall well presented, better than most. Thanks

peterowens

Friendly advice. It will be more effective having a sound.

markaceparina

For Rr, how are you getting 4.5? When I punch those numbers in, I get 7.5 instead. I'm getting the same as you are however for Rl

TheRealOneLivesOn

sorry, but this must be daft question. why is 1 and 2 on the same point?

abinmace

hi please assist I cannot understand with out a sound, please upload video with a soundMusa.

musashelton

I'm late to the party but should that say 4 time 2.5 = 10?

andyryan

hello how are you? I have a truss that I have issues to resolve can you help me?

michael-angeyougbare

first line 5kn causes an anti-clockwise moment about RL .. i think RR supposed to be 6.5 ...

DRICHARDS

Question: is this method the quickest? Or maybe considered the easiest?

peterowens

Joint method and section method are better i guess. You can get the internal force values. Graphical method only used to determine compression or tension members.

noir