arched truss
noun
a truss having an archlike form but unlike a true arch in that it is free to move horizontally at its base, as in expanding or contracting because of temperature changes.
Compare
braced arch.
Words nearby arched truss
archdukedom,
arche-,
archean,
archebanc,
arched,
arched truss,
archegoniophore,
archegonium,
archemorus,
archencephalon,
archenemy