NFPA 88A-2019 Standard for Parking Structures

NFPA 88A-2019 Standard for Parking Structures. 5.4 Openings in Fire Resistance—Rated Assemblies. 5.4.1 Doorways and other openings In fire walls and fire partitions shall be protected with approved fire doors installed in accordance with NFPA 80. 5.4.2 Where ducts pass through fire walls or fire partitions, the openings shall be protected in accordance with NFPA 90A. 5.4.3 Unless otherwise provided in 5.4.5, 5.4.6, or 5.4.7, cal openings through floors in enclosed parking structures four stories or more in height shall be enclosed with walls or partitions having a fire resistance rating of not less than 2 hours. 5.4.4 Unless otherwise provided in 5.4.5, 5.46. or 5.4.7, vertical openings through floors in enclosed parking structures less than four stories in height shall be enclosed with walls or partitions having a fire resistance rating of not less than 1 hour. 5.4.5 Ramps in enclosed parking structures shall not required to be enclosed in accordance with 5.4.3 or 5,4,4 where the parking structure is protected throughout by an approved, automatic sprinkler system. 5.4.6 Ramps in enclosed parking structures shall not be required to be enclosed in accordance with 5.4.3 or 5,4.4 where the parking structure is protected throughout by an approved, supervised, automatic fire detection system and a mechanical ventilation system in accordance with 6.3.1. 5.4.7 Openings in the floor assembly between an enclosed parking structure and an open parking structure, except exit openings, shall not be required to be enclosed where the enclosed parking structure Is protected in accordance with 5.4.5 or 5.4.6. 5.4.8 Unprotected vertical openings through floors in open parking structures shall be permitted. 5.5 Opening Requirements for Open Parking Structures. A 5.5.1 For natural ventilation purposes, the exterior sides of the structure shall have uniformly dishibuted openings on two or more sides. N 5.5.2 The area of such openings in exterior walls on a level shall be not less than 20 percent of the total perimeter wall area of each level. 5.5.3 The aggregate length (i.e., total of widths) of the openings considered to be providing natural ventilation shall be not less than 40 percent of the perimeter of the level.NFPA 88A pdf download.