Hard problems are hard.

[TheNewbiestONewbs]

So I figured out the safety margin needed for my scissor lift design that the theater department wanted. What I did was use the bending formula with a 3D truss of a basic X lift. After more mental pain than taking an ACT 2 times in a row I got it done.

[TheNewbiestONewbs]

Also that formula is   (Moment*surface area of a face) / moment of inertia about a neutral axis. Thats the long way of saying if it will snap or bend under the stress given to the object.

[DexterSmythe]

3 minutes ago, TheNewbiestONewbs said:

So I figured out the safety margin needed for my scissor lift design that the theater department wanted. What I did was use the bending formula with a 3D truss of a basic X lift. After more mental pain than taking an ACT 2 times in a row I got it done.

*Insert response here*

[TheNewbiestONewbs]

1 minute ago, CapedCrusader21 said:

*Insert response here*

*Insert response to response here*

[dalekphalm]

54 minutes ago, TheNewbiestONewbs said:

So I figured out the safety margin needed for my scissor lift design that the theater department wanted. What I did was use the bending formula with a 3D truss of a basic X lift. After more mental pain than taking an ACT 2 times in a row I got it done.

Scissor lift as in, like, a SkyJack?

 

If so, god I hope you've had it certified by an engineer and safety inspector. Using custom built, not certified equipment can get you fined multiple thousands of dollars if caught. Obviously it depends on where you live, but in Ontario, building your own powered lift device can get you in major trouble, for safety reasons.

[TheNewbiestONewbs]

1 hour ago, dalekphalm said:

Scissor lift as in, like, a SkyJack?

 

If so, god I hope you've had it certified by an engineer and safety inspector. Using custom built, not certified equipment can get you fined multiple thousands of dollars if caught. Obviously it depends on where you live, but in Ontario, building your own powered lift device can get you in major trouble, for safety reasons.

its not for anything professional. also no one will be on the devise when lifting or lowering. I have designed extra supports to ensure if it does fall it will not fall more than 2 inches. On top of that I have a 4 to 1 safety margin, designed to handle 2 times the max weight (as in the weight that will be on it when stationary) to be lifted and be fine. Also the Mechanical professor and theater director have signed off on it. I have put about 4 weeks of just designing for safety. Here in Alabama there are no laws against it, especially the highest it can go is 5 ft.

[dalekphalm]

3 minutes ago, TheNewbiestONewbs said:

its not for anything professional. also no one will be on the devise when lifting or lowering. I have designed extra supports to ensure if it does fall it will not fall more than 2 inches. On top of that I have a 4 to 1 safety margin, designed to handle 2 times the max weight (as in the weight that will be on it when stationary) to be lifted and be fine. Also the Mechanical professor and theater director have signed off on it. I have put about 4 weeks of just designing for safety. Here in Alabama there are no laws against it, especially the highest it can go is 5 ft.

Well, if there are no laws against it, I suppose. (That really concerns me about your state Safety Laws though)

 

If you tried that here in Ontario, they'd nail you to the wall with fines lol