I have a sprinkler riser that was not installed as documented. It is within the required 48" x 48" stair landing, but is out of the path of egress (if an arc is drawn from the handrail). I never design this situation (I always allow additional 12" landing depth) because IBC has issued Code Interpretation No. 41-05 stating that nothing can penetrate the required landing width (not egress width). Would NFPA-101 allow this? Do I need an NFPA code interpretation? Thank you!