Layout procedure up to this point has made no provision for the thickness
of the stair tread. To compensate for the tread thickness, the stair
horse or stringer must be "dropped." If this is not done,
the first step will be the thickness of the tread greater than the
proper tread rise, and the top step will be the same amount less than
the proper rise. Removing the correct amount from the bottom of the
horse or stringer automatically corrects the height of both the bottom
and top rises (see Figure right).
If finish flooring is to be laid after stairs are installed, the amount
that should be removed to allow for "drop" will be the difference
between tread thickness and the finish flooring.
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Monday, 2008-12-29 17:07