arch brace

American  

noun

Carpentry.

1. a curved brace, especially one of a pair used to give the effect of an arch in a roof frame.

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Example Sentences

Unless “toeing out” is corrected by exercise and a proper shoe, an arch brace will do more harm than good.

From Project Gutenberg

In any case that may arise, we must determine approximately the gross weight of the bridge and its load—as a basis, and then we can proceed as follows—in case of a Howe, Pratt, or Arch Brace Truss. 

From Project Gutenberg