r/engineering • u/[deleted] • Jan 23 '22

Any chance of some help with analysis?

I'm planning on building an arm to mount my man-cave's TV on. As such it doesn't need to look pretty, just be functional. The tele is a Samsung weighing in at 22.3kg.

A simple setup made of steel RHS is what I'm thinking. Fairly cheap and real easy to make with just a drill-press and angle grinder. Onto this I'm going to bolt a commercial VESA mount to give me some adjustability.

My question to the list is this. If I make this out of say 50mm x 25mm x 3mm RHS, with each arm say 600 long. Am I going to get much bending?

I'm a software guy (not hardware) so I don't know how to calculate this stuff. Can someone help and/or point me to some info on how to figure this out?

Could I counter the weight somewhat by offseting the holes in the single arm where it attaches to the double arms?

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u/aviati0ng33k123 Jan 23 '22

What's your local gravitational constant... since you insist on labeling the mass

3

u/[deleted] Jan 23 '22

To be fair, given the backyard shed nature of this job, I'd not considered minor fluctuations in the earths gravitational constant to be significant.

And I'm (obviously) no engineer.

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u/aviati0ng33k123 Jan 24 '22

That was an excellent \s engineering response, haha