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PM-704.4 Barriers to Ewe: Firestopping, draftstopping and thermal barriers required <br />by the building code listed in Chapter 8 shall be maintained. <br /> <br /> SECTION PM-708.0 SHAFT ENCLOSURES: <br />PM-708.1 General: All floor openings connecting two or more stories shall be protected <br />by shaft enclosures as required by Section PM-708.2. <br /> <br />Exceptions: <br /> 1. Floor openings exempted by the provisions of Section 913.3 of the building <br /> code listed in Chapter 8. <br /> 2. In buildings of Use Group B, stairs connecting not more than two stories with <br /> less than 3,500 square feet of floor area per story. <br /> 3. In buildings of Use Group B, stairs connecting not more than more than three <br /> stories provided the building is equipped throughout with an approved <br /> automatic sprinkler system. <br /> 4. In buildings of Use Group E and R-l, stairs connecting not more than more <br /> than two stories provided the building is equipped throughout with an approved <br /> automatic sprinkler system. <br /> 5. In buildings of Use Groups F and S, stairs connecting not more than two <br /> stories. <br /> 6. In buildings of Use Group F and S, stairs connecting not more titan more than <br /> three stories provided the building is equipped throughout with an approved <br /> automatic fire suppression system. <br /> 7. In buildings of Use Group M, stairs connecting not more than two stories with <br /> less than 2000 square feet of floor area per story, or when connecting not more <br /> than more than two stories provided the building is equipped throughout with <br /> an approved automatic sprinkler system. <br /> 8. In buildings of Use Group R-2, stairs connecting not more than two stories <br /> with not more than four dwelling units per story. <br /> 9. In buildings of Use Group R-2, stairs connecting not more than more than <br /> three stories with not more than four dwelling units per story provided the <br /> building is equipped throughout with an approved automatic sprinkler system. <br /> <br />PM-708.2 Enclosure Rating: Enclosures connecting not more than six stories shall <br />have a fire resistance rating of not less than 1 hour with approved opening protectives. <br />Enclosures connecting more than six stories shall have a fire resistance rating of not less <br />than 2 hours with approved opening protectives. <br /> <br /> SectiQn 2. Nothing in this ordinance or in the Property Maintenance Code hereby <br />adopted, shall be construed to affect any suit or proceeding pending in any court, or any rights <br />acquired or liability incurred, or any cause or causes of action acquired or existing under any <br />act or ordinance hereby repealed, as cited herein. <br /> <br />.~tion3. If any section, subsection, provision, sentence, clause or phrase of Otis <br /> <br />-17- <br /> <br /> <br />