Outer string

Outer string

1. The string at the outer and exposed edge of a stair, away from the wall.
2. The string at the outer and exposed edge of a stair, away from the wall. See also: String

outer string

The string at the outer and exposed edge of a stair, away from the wall.
References in periodicals archive ?
The IWA's version involves core courses, plus an outer string of individual subjects, all offered at both academic and vocational levels.
Fasten 4 strings between the 8 inner stakes so they run parallel to, and 8" in from, the outer string line.
It was smaller and thinner than a guitar, and had 8 strings in 5 courses, two single outer strings with three double-courses in between.