arched truss

American  

noun

1. 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.

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Example Sentences

The car is 40' × 13', with arched truss sides.

From Scientific American Supplement, No. 484, April 11, 1885 by Various

"He introduced the inflexible arched truss, which has probably been in more general use in the United States than any other system of timber bridges."

From Scotland's Mark on America by Black, George Fraser

The singular Colossus bridge, built in 1812 over the Schuylkill, a kind of flat arched truss, had a span of 340 ft.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various