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| 29 Jun 2013 03:53 PM
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I am currently building a house and I have reached the roof, but the problem is that my walls are not strong enough to support the weight of the roof. How can I fix this problem?
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| 29 Jun 2013 04:02 PM
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How do I get a stronger material? What material should I use?
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| 29 Jun 2013 04:06 PM
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Steel is expensive... what other materials would be useful? Maybe I can find a cheaper material...
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