wall-stringn. the string-board of a staircase which is next the wall.
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society > inhabiting and dwelling > inhabited place > a building > parts of building > stairs > [noun] > stringers > specific
stringboard1703
string1711
wall-string1849
1849 P. NicholsonCarpentry II. 3 Those pieces which support the ends of the steps are called strings.—That against the wall is called the wall string; the other, the outer string.