Abstract: At approximately 3:15 p.m. on November 19, 2004, Employees #1 and #2 were installing drywall inside the elevator shaft Number 1 on the third floor. Both employees had been employed by Jade, Inc. as drywall installers. Employee #1 was employed for 3 years, and Employee #2 was employed less than three years. Their job duties consisted of drywall installation. The day prior to the incident, the foreman told the assistant foreman to hang drywalls inside elevator shaft Numbers 1 and 2. On the day of the incident, the foreman assigned Employees #1 and #2 to install drywall inside the elevator shaft. The incident occurred on the platform, which the employees were standing on to hang the drywall. The cross support 2-in by 4-in wood and the plywood sheathing broke. This caused two employees to fall down the elevator shaft from the third floor to the bottom of the pit. As a result of the incident, both employees sustained multiple fractures. The contributing causal factor: the work platform/temporary cover was not properly constructed and also it was not adequately supporting the loads imposed on it. Employees were hospitalized and treated for fractures.