Which material is good (cost and strength wise)

[GotGirth?]

I'm currently designing an observation deck as a project.
We have to consider a strong, light and cheap material that will hold 15<x<25kg.
I considered bamboo, any other ideas?

 

[etudiant]

How big a platform and how high?
The 15 to 25kg load measure you give is insufficient to give any response.
Is that the total load, ie a toy platform, or the load/m2 or what?

 

[jehake12]

Check out home depot?