Commentary:
This Section limits the position of exterior column working points at any
given splice elevation to a narrow horizontal envelope parallel to the
building line (see Figure C–7.6). This envelope is limited to a width of 1
1/2 in. [38 mm], normal to the building line, in up to 300 ft [90 000 mm] of
building length. The horizontal location of this envelope is not necessarily
directly above or below the corresponding envelope at the adjacent splice
elevations, but should be within the limitation of the 1 in 500 plumbness
tolerance specified for the controlling columns (see Figure C–7.5).
(d) For an exterior column shipping piece, the displacement of member
working points from the Established Column Line, parallel to the building
line, shall be equal to or less than 2 in. [50 mm] in the first 20 stories.
Above this level, an increase in the displacement of 1/16 in. [2 mm] is
permitted for each additional story up to a maximum displacement of 3 in.
[75 mm] parallel to the building line.