For an exterior individual column shipping piece, the member working
points at any splice level for multi-Tier buildings and at the tops of columns
for single-Tier buildings shall fall within a horizontal envelope, parallel to
the building line, that is equal to or less than 1 1/2 in. [38 mm] wide for
buildings up to 300 ft [90 000 mm] in length. An increase in the width of this horizontal envelope of 1/2 in. [13 mm] is permitted for each additional
100 ft [30 000 m] in length up to a maximum width of 3 in. [75 mm].