Does the sill for a 3 hour fire rated rolling service counter shutter have to be part of the tested assembly?
All manufactured products available are tested up to 2 hours with a sill; not 3 hours. These products are permitted to be tested as rolling fire doors by this standard. Are there any other requirements for the sill, outside of non combustibility and extending flush with the wall opening? Is there a required standard that it should be tested to?