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Contraction joints (sometimes called control joints) are used in unreinforced and lightly reinforced slabs-on-ground to minimize random cracking. What else do you know about installing contraction joints? Can you ace the below quiz?














![Strux Macrofibers 58c9b97fd4aaf[1]](https://img.forconstructionpros.com/mindful/acbm/workspaces/default/uploads/2025/08/strux-macrofibers58c9b97fd4aaf1.cNEEIfY9kp.png?ar=16%3A9&auto=format%2Ccompress&fit=crop&h=135&q=70&w=240)




