Which is better for structural support PVC pipe or plywood?

[AamsterC2]

Just a weight placed right in the middle like if there's a tube, a box beam and a hollow triangular structure each a meter long with the same wall thickness, held at either end and each with a force pressing down on the center. Which could withstand the most force?

Edit: And so sorry, I can't upload a 3D image

 

[Nidum]

Best support for that kind of structure is a pair of shaped plywood cuttings with spacers between .

 

[AamsterC2]

Shaped how?

 

[AamsterC2]

oh so an anvil shape but would it hold out with 3m on either side and all the weight?

 

[Nidum]

I see that you have added some new dimensional information to one of your posts since I first read it .

To have cantilevered platforms as long as 3 metres on a narrow central support pillar is not a realistic proposition .

Possibilities :

Use three or more support pillars with metal bracing at intermediate and end locations .

Use multiple trestle leg supports under the whole lengths of the platforms - probably much easier for you anyway .

 

[AamsterC2]

Ok hmm I suppose I could try making support for the ends that could be placed after the wings

 

[Nidum]

Can you fix the construction to a wall ?

 

[AamsterC2]

No, I was planning on it to be mobile

 

[the professor]

KISS IS THE EQUATION- you can build a bow -archery type- out of pvc -good luck with plywood.

 

[Dr.D]

What I'm making is a long wing like structure for display, it will be about 10ft (3m) long and I'd like it to last a long time.

I'd be very reluctant to build anything from PVC if I wanted it to last a long time. PVC is a plastic type material and deforms plastically with the passage of time. Plywood has some of the same problems, but to a much lesser degree in most situations.