Complex sentence: The top beams in a truss are called top chords and are typically in compression, the bottom beams are called bottom chords and are typically in tension, the interior beams are called webs, and the areas inside the webs are called panels.
Split into simpler sentences: The top beams in a truss are called top chords and are typically in compression, the bottom beams are called bottom chords, and are typically in tension. The interior beams are called webs, and the areas inside the webs are called panels.