2022-133-E-AMS-Warren Hay Mechanical Contractors-Emergency Services Warehouse Dehumidification

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ORANGE COUNTY 019913-10 Emergency Management Warehouse Building Dehumidification General Requirements for Divisions 23 and 26 Work 1 2 FIRESTOPPING SYSTEMS 3 4 Firestop systems shall be used in locations including, but not limited to, the following: 5 6 7 Penetrations through fire resistance rated floor assemblies and roof assemblies (where required by code) 8 including both empty openings and openings containing penetrants. 9 10 Penetrations through fire resistance rated wall assemblies including both empty openings and openings 11 containing penetrants. 12 13 Membrane penetrations in fire resistance rated wall assemblies where items penetrate one side of the 14 barrier. 15 16 Membrane penetrations in fire resistance rated ceiling assemblies. 17 18 Systems or devices must be listed in the UL Fire Resistance Directory and must conform to construction type, 19 penetrant type, annular space requirements and fire rating involved in each separate instance. System must be 20 symmetrical for wall applications. 21 22 Systems or devices must be asbestos-free and all products must be from a single manufacturer. 23 24 Products must withstand the passage of cold smoke, either as an inherent property of the system or by the use of a 25 separate product included as part of the UL system or device, and designed to perform this function. 26 27 Cracks, Voids, or Holes Up to 4" Diameter: Putty or caulking, one-piece intumescent elastomer, non-corrosive to 28 metal, compatible with synthetic cable jackets, Listed, and capable of expanding 10 times when exposed to flame or 29 heat. 30 31 Openings 4" or Greater: Sealing system capable of passing 3-hour fire test in accordance with ASTM E-814, 32 consisting of wall wrap or liner, partitions, and end caps capable of expanding when exposed to temperatures of 250 33 to 350 deg. F (121 to 177 deg. C), Listed. 34 35 Wall Boxes: 36 37 Metallic boxes used in fire-rated walls or floors must be listed in the UL Fire Resistance Directory under 38 category CEYY. 39 40 Listed single and double gang metallic device and outlet boxes with metallic or nonmetallic cover plates may 41 be used in bearing and nonbearing wood stud and steel stud walls with ratings not exceeding 2 hours. The 42 metallic outlet or switch boxes shall be securely fastened to the studs and the opening in the wallboard 43 facing shall be cut so that the clearance between the box and the wallboard does not exceed 1/8 in. The 44 surface area of individual metallic outlet or switch boxes shall not exceed 16 sq. in. The aggregate surface 45 area of the boxes shall not exceed 100 sq. in. per 100 sq. ft. of wall surface. 46 47 Metallic boxes located on opposite sides of walls or partitions shall be separated by a minimum horizontal 48 distance of 24 in. This minimum separation distance between metallic boxes may be reduced when “Wall 49 Opening Protective Materials” listed in the UL Fire Resistance Directory under category CLIV are installed 50 according to the requirements of the Classification. 51 52 Metallic boxes shall not be installed on opposite sides of walls or partitions of staggered stud construction 53 unless “Wall Opening Protective Materials” are installed with the metallic boxes in accordance with 54 Classification requirements for the protective materials. 55 56 57 WALL AND FLOOR ACCESS DOORS 58 59 DocuSign Envelope ID: 7668B866-6C26-485C-9A45-DAAB5D4BD951