Interior exit stairways and interior exit ramps shall be enclosed with fire barriers constructed in accordance with section 706 or horizontal assemblies constructed in accordance with section 711, or Ò€¦ Interior exit stairway and ramp enclosures shall have a fire-resistance rating of not less than 2 hours where connecting four stories or more and not less than 1 hour where connecting less than four stories. Installation of firestop, fire-resistant joint systems and perimeter fire barrier systems in residential-use buildings now requires special inspection in group r fire areas having an occupant load exceeding Ò€¦

A fire door assembly complying with section 716. 5 shall be installed in the fire barrier to provide a means Ò€¦ The number of stories connected by the interior exit stairways or ramps shall include any basements, but not any mezzanines. Interior exit stairways and ramps shall have a fire-resistance rating not less Ò€¦ Any structure supporting the stairway and the stairway enclosure must be fire-resistance rated consistent with the construction type; However, the stairway components inside the enclosure need Ò€¦

However, the stairway components inside the enclosure need Ò€¦

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