• (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. Found on http://thinkexist.com/dictionary/meaning/tiebeam/
Tie'beam` 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. See Illust. of Timbers , under Roof . Gwilt. Found on http://www.encyclo.co.uk/webster/T/56
In architecture a tiebeam is a beam acting as a tie, as at the bottom of a pair of principal rafters, to prevent them from thrusting out the wall. Found on http://www.probertencyclopaedia.com/browse/TT.HTM