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.
Test No. 5.
Marks on column—none.
Reinforcement—eight 7/8-in. bars vertically.
Hoops spaced 10 in. vertically.
Outside diameter of hoops—14-1/2 in.
Wire spiral as before.
Load at failure—1,100,000 lb.
Ultimate load—1,130,000 lb.
Remarks.—The main point of failure in this, as in all other columns, was within 2 ft. of the top, although this column showed some scaling off at the lower end.