Why do sidewalks have blocks, instead of being solid?
In: 205
We build them that way so that the cracks that WILL form, will form in a controlled way that causes the least structural damage.
I’ve worked concrete, and my first time on the job one of the old guys said “There’s only two things I know about concrete. It will get hard. And it will crack.”
And he’s absolutely right. Concrete will always, always crack. But by doing things like putting those grooves in it, we can control where and how they crack. And doing it that way we can at least make sure you always have a flat surface to walk on.
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