treadboard

(architecture) A board to take a person's weight; a tread of a staircase.

Japanese Meaning

人の体重を支えるための板、または階段の踏み板

The carpenter nailed a spare treadboard onto the scaffold before the crew began work.

大工は作業員たちが作業を始める前に、足場に予備の踏み板を打ち付けた。

Sense（1）

(architecture) A board to take a person's weight; a tread of a staircase.

treadboards

（ plural ）