# A sidewalk is made in squares of length 1 meter on each side, with expansion gaps between segments to avoid cracking. If sidewalk concrete has a linear expansion coefficient of 15*10^-6 (1/K), how far apart do the expansion gaps need to be to ensure that the sidewalk doesn't crack? Assume a 50 K temperature variation of the sidewalk.

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Asked Dec 10, 2019
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A sidewalk is made in squares of length 1 meter on each side, with expansion gaps between segments to avoid cracking. If sidewalk concrete has a linear expansion coefficient of 15*10^-6 (1/K), how far apart do the expansion gaps need to be to ensure that the sidewalk doesn't crack? Assume a 50 K temperature variation of the sidewalk.

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Step 1

Given,

Step 2

Now, thermal ex...

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