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arched truss

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. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for arched truss
  • The new bridge also features an arched truss that looks similar to the frame of the old structure.

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