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KAISER PERMANENTE Site Prep #1 Electrical Service <br />ASC & Clinic (HUB) March 18, 2020 <br />Everett, WA Project No. 19.05002.00 <br />2.4 HANGERS, SUPPORTS AND RESTRAINTS <br />A. Comply with Division 23, Section "Vibration and Seismic Controls for Mechanical Piping <br />and Equipment." <br />B. Building Attachments: Concrete inserts, stud -wedge or female wedge, mechanical - <br />anchor bolts, or structural -steel fasteners appropriate for building materials. Powder <br />actuated concrete fasteners are not allowed. <br />1. If concrete inserts cannot be used, install mechanical -anchor (stud -wedge or <br />female wedge type) bolts in concrete after concrete is placed and completely <br />cured. Install fasteners according to manufacturer's written instructions. <br />Concrete inserts and mechanical -anchor fasteners shall be made of steel. <br />Stainless steel for outdoor applications. <br />C. Hanger Materials: Galvanized, sheet steel or round, threaded steel rod. <br />1. Hangers Installed in Corrosive Atmospheres: Electrogalvanized, all -thread rod or <br />galvanized rods with threads painted after installation. <br />2. Straps and Rod Sizes: Comply with SMACNA "HVAC Duct Construction <br />Standards --Metal and Flexible" for sheet steel width and thickness and for steel <br />rod diameters. <br />D. Duct Attachments: Sheet metal screws, blind rivets, or self -tapping metal screws; <br />compatible with duct materials. <br />E. Trapeze and Riser Supports: Steel shapes complying with ASTM A 36/A 36M. <br />1. Supports for Galvanized -Steel Ducts: Galvanized steel shapes and plates. <br />2. Supports for Stainless -Steel Ducts: Stainless -steel support materials. <br />3. Supports for Aluminum Ducts: Aluminum support materials, unless materials are <br />electrolytically separated from ductwork. <br />2.5 RECTANGULAR DUCT AND FITTING FABRICATION <br />A. Alternate Manufactured Rectangular Duct and Fittings: <br />The contractor has the option to use Accuduct Mfg. SPIRAQUAD. SPIRAQUAD <br />is considered equal to standard rectangular ducts of the same SMACNA static <br />pressure class. <br />B. General: Fabricate ducts, elbows, transitions, offsets, branch connections, and other <br />construction with galvanized, sheet steel, according to SMACNA "HVAC Duct <br />Construction Standards --Metal and Flexible," based on indicated static pressure class, <br />unless indicated otherwise. Comply with requirements for metal thickness, reinforcing <br />types and intervals, tie -rod applications, and joint types and intervals. <br />1. Lengths: Fabricate rectangular ducts in lengths appropriate to reinforcement and <br />rigidity class required for pressure classification. <br />2. Materials: Free from visual imperfections such as pitting, seam marks, roller <br />marks, stains, and discolorations. <br />3. Transverse Joints: Select joint types and fabricate according to SMACNA's <br />"HVAC Duct Construction Standards - Metal and Flexible," Figure 1-4, <br />"Transverse (Girth) Joints," for static -pressure class, applicable sealing <br />requirements, materials involved, duct -support intervals, and other provisions in <br />SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." <br />METAL DUCTS 2331 13 - 4 <br />