3303.7.7.1 Interior exit stair enclosures.
BC § 3303.7.7.1
Notwithstanding the requirements of Section 3303.11, no wooden structural components shall be installed until the permanent stairs and interior exit stair enclosures have been constructed to a height of at least two floors above the topmost working deck, or to their full height, and enclosed with their permanent fire protected rated material. A temporary or permanent self-closing door that meets the requirements of Section 715 shall be installed at each level as soon as a walkable surface is in place at that floor level. Openings in the interior exit stair enclosures at levels where a walkable surface has not been placed shall be protected with guardrails that meet the requirements of Section 3308.7. The top of the interior exit stair enclosure, if not permanently enclosed, shall be covered with a tarp or other temporary weather protection. The stair shall be provided with temporary or permanent handrails. Permanent signs, markings, or anti-slip materials in the stairs are not required during construction.
