a horizontal beam used to prevent two other structural members from spreading apart or separating;
"he nailed the rafters together with a tie beam"
例句
用作名词 (n.)
The foundation of the pylon is composed of bored piles and separate pile caps connected with prestressed concrete tie beams. 主塔基础采用分离式承台钻孔桩基础，两承台设横系梁连接，系梁为预应力混凝土结构。
美
