Casimer Kowalewski v. United States Steel Corporation v. Penn Window & Office Cleaning Company(third-Party Defendant)

This is an appeal by the plaintiff in a personal injury case. 1 Kowalewski was employed by the Penn Window & Office Cleaning Company, joined in this case as third-party defendant. That company had a contract with the United Statés Steel Corporation for cleaning the windows in the corporation’s building in Vandergrift, Pennsylvania. The injury suffered by the plaintiff took place while he was cleaning a window on the fourth floor of the building. His safety belt was supplied by his employer, not the Steel Corporation. He fell from a window sill when a lug of his safety belt slipped from the…