DeTrae Enterprises' (DeTrae) petitions for review of an order of the Occupational *104Safety and Health Review Commission holding DeTrae responsible for certain serious violations of regulations promulgated pursuant to the Occupational Safety and Health Act, 29 U.S.C. §§ 651-678.1 The violations were found to have existed on September 5, 1979 at a construction site located at Smithhaven Mall, Lake Grove, New York, where DeTrae was employed as a masonry subcontractor. The Commission found that DeTrae had allowed its employees to work near unguarded floor openings and open sided floors, had failed to provide standard handrails at two stairways, and had neglected to fill the hollow pan treads of one stairway with concrete, in violation of 29 C.F.R. §§ 1926.500(b)(1), 1926.-500(d)(1), 1926.500(e)(1)(iv) and 1926.501(f). DeTrae contests these findings on the primary ground that it had no control over creating or correcting the safety violations.

The petition for review is denied and the Commission’s decision is affirmed in all respects.2 There is substantial evidence to support the findings of the Commission that the petitioner committed the violations charged by permitting its employees to use the unguarded areas on the construction site. Petitioner neither provided alternative means of protection for its employees, warned its employees, nor prevented them from using the hazardous areas. Even though DeTrae, as a subcontractor, neither created nor controlled the hazardous conditions, it had the primary responsibility for the safety of its own employees and was obligated to take realistic steps to protect them. Bratton Corp. v. OSHRC, 590 F.2d 273, 276-78 (8th Cir. 1979).