bottom chord meaning

• [Architecture]
  

  The lower longitudinal member of a truss.

• 
  [Civil engineering]
  Any of the bottom series of truss members parallel to the roadway of a bridge.

• chord:    Noun: chord & ...
• at bottom:    Adverb: at bottomI ...
• at the bottom of:    The real origin or ...

Examples

1. curved bottom chord
2. the fatigue strength of bottom chord node board, which is sensitivity to fatigue, is calculated by fem method
3. Square end joists are primarily intended for bottom chord bearing.
4. The bottom chords of the bridges range from to and the width averages.
5. More than half the bridge's bottom chords were bent or twisted beyond repair.