Marks on column--Box 4.
Reinforcement--eight 1-in. round bars vertically.
Hoops spaced 8 in. vertically.
Wire spirals as on other columns.
Total load at failure--1,260,000 lb.
Remarks.--First indications of failure were nearest the bottom end of
the column, but the total failure was, as in all other columns, within 2
ft. of the top. Large cracks in the shell of the column extended from
both ends to very near the middle. This was the most satisfactory
showing of all the columns, as the failure was extended over nearly the
full length of the column.