STRUCTURAL WOOD FRAMING SYSTEMS - ROOF OR FLOOR OPENINGS Cal. Code Regs, tit. 8, § 1716.1(e)(1) (2012) - It was clear that the fatally injured worker fell through an unprotected opening in a roof and that Employer had failed to install any of the protections required by §1716(e)(1). The ALJ correctly found that Employer had violated the safety order.