bottom chord

基本解釋

The single-chorded plane space truss have the low flexural rigidity out of plane because of lacking bottom chord.
單弦桿平板網(wǎng)架由于無下弦桿，因而具有平面外抗彎剛度較低的特點。
The analysis reveals that the dynamic behavior of the converse trapezoid CHS truss with double pipe bottom chord is quite good.
分析表明以下弦雙鋼管為特征的倒梯形立體管桁架的動力特性非常理想；
The double groove steel is suspended under the two nodes of bottom chord of steel roof truss to prevent the bottom chord from stretch bending.
文章論述了在設計中采用鋼屋架下弦兩節(jié)點下懸吊雙槽鋼作為分布梁避免鋼屋架下弦拉彎工作。