Does the Second Exception in Section R311.4.3, which permits the landing to be 7-3/4 inches below the top of the threshold, apply to all exterior doors, including the required exit door?
Yes. The required exit door is classified as an exterior door. The provisions of the Second Exception in Section R311.4.3 permits a landing to be placed a maximum of 7-3/4 inches below the top of the threshold at any exterior doorway, which does include the required exit door.(Note that 2003 IRC only requires one exit door.) Back to TopQ: If a basement contains a sleeping room and other habitable space, does an emergency escape and rescue opening in the sleeping room satisfy the requirement for the other habitable space in the basement?A: Yes. The second sentence of 5310.1 provides guidance on this. Basement sleeping rooms need direct access to an EER opening within said sleeping room. However, if a basement had one sleeping room and some habitable space, the EER opening within the bedroom would satisfy the requirement for the entire basement.
