Which material is good (cost and strength wise)

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When designing an observation deck, it's crucial to select a material that is strong, lightweight, and cost-effective, with a load capacity of 15 to 25 kg. The initial inquiry about bamboo as a material is valid, but further clarification on whether the weight is total or per square meter is needed for accurate recommendations. The discussion suggests consulting local hardware stores like Home Depot for material options. Additionally, the size and height of the platform are important factors that influence material choice and structural integrity. Clear specifications will lead to better material selection and design outcomes.
GotGirth?
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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?
 
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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?
 
Check out home depot?
 
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