Drywall Spacer - Stairway Construction
Usually a 2 x 4 or 1 x 4 that attaches to one side of the stair stringer to allow a gap between the wall and the stringer to allow easy drywall installation around the stair stringer's.
Even though the drywall spacers have been attached to the stair stringers, the stair treads and risers still need to be cut correctly, otherwise you will defeat the purpose for creating this gap.
Stairs / Stair Glossary
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