Hello Experts

I should like your opinions on something if you wouldn`t mind, scenario is:

3 storey build, a house that has disabled living in with full time sleep in carers, so as you would expect, full lighting, alarms, signage, compartmentation etc, however, Top floor is a flat that has an alternative exit of Iron stairs,  said stairs pass 2 large windows of 2nd and ground floor, Would you expect the glass of those windows to be Fire resistive to counteract any flame/heat radiating out across stairs from fire below ?

Thank you 

Yes!