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Definition of Tiebeam
1. n. A beam acting as a tie, as at the bottom of a pair of principal rafters, to prevent them from thrusting out the wall. See Illust. of Timbers, under Roof.
Definition of Tiebeam
1. Noun. (architecture) A beam acting as a tie, as at the bottom of a pair of principal rafters, to prevent them from thrusting out the wall. ¹
¹ Source: wiktionary.com