1 hr confidence: break line
Explanation: The display of stairs in floor plan view can be customized to include a stair break line, newels, balusters, railing, tread overhang, and stringers.
-------------------------------------------------- Note added at 1 hr (2019-09-10 02:08:24 GMT) --------------------------------------------------
I think this is the term in an architectural context such as yours Stair tread depth should be 10 to 12" (250-300 mm) with 10" (254 mm) minimum. .... Notice also that the stairs are drawn broken with a long break line One is the long break line and the other is the short break line. The long break line is the type of line that is associated with the architectural drafting. To terminate a feature on the drawing, after the clear definition of the feature extend, break lines can be used.
-------------------------------------------------- Note added at 1 hr (2019-09-10 02:10:29 GMT) --------------------------------------------------
I understand it to refer to the line that separates a stair segment from a landing before the next stair segment continues
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