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Title 17F
Chapter 17F.070
Section 17F.070.200
 

Title 17F Construction Standards

Chapter 17F.070 Existing Building and Conservation Code

Section 17F.070.200 Interior Stairways
  1. Every interior stairway must be enclosed with walls of at least one-hour fire-resistive construction, except that where existing partitions form part of a stairwell enclosure, wood lath and plaster in good condition is an acceptable substitute.
  1. Enclosure must include landings between flights and all corridors, passageways and public rooms necessary for continuous exit to the outside.
  1. Doorways to required enclosures must be protected by a self-closing door equivalent to a solid wood door at least one and three-quarters inch thick with a two-inch nominal wood frame and rabbeted jamb.
  1. A stairway need not be enclosed, subject to approval:
    1. in a continuous shaft if cut off at each story by fire-resistive construction as is required for stairwell enclosure; or
    1. when the building has an approved automatic fire extinguishing system with sprinkler heads centered on both sides of every door entering an exit.

Date Passed: Monday, February 28, 2005

Effective Date: Saturday, April 2, 2005

ORD C33594 Section 6