In architecture and engineering, describing a beam or structural element that is built into or fixed at both ends.
From French 'encastré,' past participle of 'encastrer' (to build in, from en- + castre). This is a technical term borrowed directly from French architectural terminology.
Engineers use this term to describe how strong a structure is—an 'encastre beam' is locked in at both ends, making it much stronger than one that's free to move at the ends!
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