| Answer | Crossword Clue |
|---|---|
| STAIR | Risers plus treads |
| stringers | A side of a staircase, which supports the treads and risers |
| stringer | one of the sloping sides of a stair, supporting the treads and risers |
| bridgeboard | a board on both sides of a staircase that is cut to support the treads and risers |
| bridgeboards | BRIDGEBOARD, a board on both sides of a staircase that is cut to support the treads and risers |
