筋すじ交かい

noun, noun which may take the genitive case particle 'no'

diagonal; oblique; brace

Refers to a diagonal structural member or bracing, such as in carpentry or framework. Also used adjectivally with の to mean 'diagonal'.

• 壁かべに筋すじ交かいを入いれて補ほ強きょうした。

  We reinforced the wall by adding diagonal braces.

• 筋すじ交かいの線せんを引ひいてください。

  Please draw a diagonal line.