Translation of "crossbar" into Japanese

When you straddle the crossbar, you should be able to place your feet on the ground (see above).

クロスバーをまたぐとき,両足が地面につくようにします(上をご覧ください)。

Evidently when the hanging line coincided with a center mark on the crossbar, this indicated that the surface on which it was placed was level.

つり下げられた糸が横木の中央の目印に合えば,水準器を置いた面が水平であることを示したようです。