The trial court properly granted defendant property owner summary judgment under Privette v. Superior Court (1993) 5 Cal.4th 689.  Plaintiff was injured while working as a contractor’s employee, fixing the building’s HVAC system.  Plaintiff failed to raise a triable issue of fact under the Kinsman v. Unocal Corp. (2005) 37 Cal.4th 659 exception to Privette.  Plaintiff fell through the ceiling when working around HVAC ducts in the space between the ceiling and the roof.  There was a triable issue as to whether the defendant had actual or constructive knowledge that a trapdoor intended to give access to that space created a weak spot and thus a hazard of injury by falling through the trap door.  But there was no evidence to show that the owner knew or should have known that the contractor was unaware of that danger which should have been disclosed if the contractor had inspected the worksite and should not have caused injury if the employees followed their employer’s usual safety protocols for working in similar spaces.