(Fire Resistance Ratings) Stability, Integrity and ...（(防火评级)稳定性、完整性和）.pdf

Design No. FRD-5 October 21, 2005 (Fire Resistance Ratings) Stability, Integrity and Insulation - 1 2 h (See Items 3 and 6) This material was extracted by 3M Fire Protection Products from the 2006 ULC Fire Resistance Directory 2 Maximum Size of Duct — 1.2 m maximum area with no dimension exceeding 2.1 m. For ducts penetrating combustible floor/ceiling assemblies, maximum area 0.62m2 with no dimension exceeding 1.22 m. Support Spacing — 1 500 mm max. Duct Use Limitation — Duct is intended for use in pressurization situations or maximum negative pressure 300 Pa within duct. 1. Masonry Wall or Floor — Minimum depth or thickness as necessary for the grade of fire separation but not less than 115 mm. Normal-density or low-density concrete. Wall can also be constructed of nominal 190 mm thick concrete block laid up with mortar. OR (a) Wall Assembly — The fire-rated gypsum wallboard and steel or wood stud assembly shall be constructed of the materials and in the manner described in the individual Wall or Partition design in the ULC List of Equipment and Materials, Fire Resistance Ratings. OR (b) Floor/Ceiling Assembly — The fire-rated combustible floor/ceiling assembly shall be constructed of the materials and in the manner described in the individual Floor- Ceiling design in the ULC List of Equipment and Materials, Fire Resistance. 2. Ventilation Air Duct — Duct to be constructed in accordance with the requirements of the Standard for the Installation of Air Conditioning and Ventilation Systems, NFPA 90A, 1993 Edition. Minimum thickness of steel permitted, 0.7 mm thick galvanized steel; maximum size of duct 600 mm by 2 100 mm nominal (1.2 m2 maximum area with no dimension exceeding 2.1 m). For duct requiring a three-sided wrap (Item 3, Option A), top surface of duct to