A joint that makes allowance for thermal expansion of the parts joined without distortion.
- An expansion joint connects that bay to the penultimate bay from the original design.
- In the portion of the building that remained standing to the north of the expansion joint, the slab and second-floor columns were heavily damaged.
- Provide an expansion joint by removing the mortar along the joint down to the concrete, and use polyurethane caulk to fill the joint.
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Syllabification: ex·pan·sion joint
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