What is the minimum headroom above the attic access opening according to PD 1096?

The minimum headroom above the attic access opening, as specified by PD 1096, is 800 mm. This requirement is established to ensure safety and accessibility for individuals accessing the attic space. Adequate headroom is crucial to prevent injury and to allow for easy movement within that area. The specifications set forth in PD 1096 reflect best practices in building safety, ensuring that users can enter and exit the attic comfortably without the risk of bumping their heads or navigating a cramped space.

While other options presented may vary in height, the specific requirement of 800 mm aligns with creating a practical balance between safe access and the design considerations of building spaces. Providing insufficient headroom could lead to safety hazards, which is why the regulatory guidelines emphasize this minimum height.