What is the part marked as ‘X’ in the given trussed partition?

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Interior Design and Decoration Practice Test: Civil Components (Partition) — practice the complete quiz, review flashcards, or try a random question.


What is the part marked as ‘X’ in the given trussed partition?<br><img src='https://www.fatskills.com/images4/BS/interior-design-civil-components-partition-9.GIF'>