径けい間かん

noun

span; distance between two points; distance between supports

Technical term used in architecture and civil engineering for the span of an arch, bridge, or similar structure; also refers to the distance between two points in general.

• この橋はしの径けい間かんは50メートルです。

  The span of this bridge is 50 meters.

• アーチの径けい間かんを測はかる。

  Measure the span of the arch.