On or about March 20, 2015, at 3:30 p.m., an employee was placing/helping to place a structural tube on a concrete pier foundation at the jobsite. While the tube was being set, the bottom of the column slipped off of the pier and hit the employee on the ankle. The structural tube pier weighed approximately 250 pounds and was approximately 14 to 16 feet long. This structural tube would be used as a vertical support tube.