City and County of San Francisco CONTRACT No A SFO - Data Center, Building 60 SECTION CABLE TRAYS FOR COMMUNICATIONS SYSTEMS

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1 SECTION CABLE TRAYS FOR COMMUNICATIONS SYSTEMS PART 1 - GENERAL 1.1 SCOPE OF WORK A. Cable Trays for Communications Cabling 1. Cable Trays 2. Cable Runways 3. Basket Tray B. Cable Tray Support 1.2 RELATED WORK UNDER OTHER SECTIONS A. Related Sections: 1. Section Common Work Results for Communications 2. Section Grounding and Bonding for Communications Systems 3. Section Hangers and Supports for Communications Systems 4. Section Conduits and Backboxes for Communications Systems 5. Section Surface Raceways for Communications Systems 6. Section Noise and Vibration Control for Communications Systems 7. Section Identification for Communications Systems 1.3 REFERENCES A. Usage: In accordance with Section Regulatory Requirements. 1. National Electrical Manufacturers Association (NEMA) a. NEMA FG Fiberglass Cable Tray Systems b. NEMA VE Metal Cable Tray Systems. c. NEMA VE Metal Cable Tray Installation Guidelines 1.4 SUBMITTALS A. Conform with the requirements of Section Shop Drawings, Product Data and Samples and Section Common Work Results for Communications. 1.5 DELIVERY, STORAGE AND HANDLING A. Procedures: In accordance with Section Product Requirements. 1.6 SEQUENCING A. Not Used. PART 2 - PRODUCTS 2.1 CABLE TRAY, CABLE RUNWAY AND BASKET TRAY A. Cable Tray 1. Drawing and spec reference: CTxx-yy, where "xx" denotes nominal width of cable runway in inches and yy denotes nominal depth. 2. Construction: a. Steel or aluminum. b. Rungs 9" on center, unless otherwise noted. c. UL Classified splice kits. Addendum 4 Section Page 1 of 5

2 d. Accessories. Provide with a complete system of accessories, including radiused corners at vertical and horizontal bends, section splice plates, expansion plates, blind-end plates, etc. Provide waterfall drop-outs at each end of cabling racks and cabinets indicated on the plans scheduled or indicated to terminate open wiring systems. 3. Approvals: a. ASTM A513 b. California Electrical Code, Article 318 c. NEMA VE1 Class 12C minimum, or to suit indicated cable and raceway loads, whichever is greater. 4. Manufacturers: a. B-Line Cable Tray Systems Ladder Type Cable Tray with a complete system of accessories, including Ladder Drop-outs b. Globe Tray c. PW Industries d. or equal. B. Cable Runway 1. Drawing and spec reference: CR*, where "*" denotes nominal width of cable runway in inches. 2. Construction: a. Solid Steel Side Bar per ASTM A-36 or Tubular Steel Side Bar per ASTM A-513. b. 1.5" x minimum tubular side stringers. c. UL Classified splice kits. d. Designed to support at least 100 pounds per foot load with a Safe Working Load deflection of ½ or less. 3. Finish: Telco gray powder coat or gold on zinc plating. 4. Approvals: a. ASTM A513 b. UL Classified as an equipment grounding conductor. c. California Electrical Code, Article Manufacturers: a. B-Line Telecom-Saunders SB-17. b. Chatsworth Products Inc series. c. PW Industries d. or equal. C. Cable Tray, Open Wire Frame 1. Drawing and spec reference(s): CTWxx-y, where xx denotes the tray width and y the depth of the tray, in inches. 2. Construction a. Welded wire mesh with continuous safety edge wire lip. b. Mesh forms grid at nominally 2" by 4" c. Carbon Steel d. Electroplated zinc galvanized e. All bends, seams and joints field fabricated from basic straight section pieces and splice components as supplied by the manufacturer. f. Provide a complete system of accessories, including bonding and grounding connections, conduit connectors, to terminate conduits extended to basket edge, radius shields to protect cabling at inside corners, and waterfall drop-outs at each end of cabling racks and Addendum 4 Section Page 2 of 5

3 cabinets indicated on the plans scheduled or indicated to terminate open wiring systems. g. Where supported from ceiling, supported at both sides in trapeze arrangement centerline support not acceptable. h. Provides pathway complying with EIA/TIA-569B and NEMA Publications VE1 & VE2 i. Meets requirements of California Electrical Code, Article Approvals: a. NEMA Publications VE1 & VE2 4. Manufacturers: a. B-Line Wire Basket Runway with B-Line Conduit Connectors, Radius Shields, and Drop-out sized to match the indicated raceway, either individually or in combinations of multiple units. b. Cablofil c. G.S. Metals Corp d. PW Industries e. or equal. D. Fiber Runway 1. Drawing Reference: Fiber Runway 2. Features: a. Provides for management of end-user fiber optic jumper/patch cords cords. 3. Construction: a. 6 inch wide by 4 tall trough system (continuous side and bottom) without cover designed by the manufacturer for use in fiber patch cord management. b. Provide manufacturer s system of horizontal section splices, radiused bends and drop out fittings to provide a smooth, seamless pathway for patch cord management. At each rack or cabinet that the fiber trough passes over as shown on the plans, provide two premanufactured drop-outs one to the right and left aligned over the top of cabinet knockouts and vertical wire managers of the cabinets and racks as applies. 4. Manufacturer s: a. ADC b. Panduit c. Tyco d. Or equal. PART 3 - EXECUTION 3.1 CABLE TRAY APPLICATION A. Unless otherwise noted, communications cable tray installations shall conform to the following: 1. Type CT - Within Communications Rooms (including ADF, BDF and IDF spaces) 2. Type CTW - Horizontal station cabling outside of the communications rooms where shown on plans or where more than 100 cables are supported, whichever is greater. 3. Type CR Wherever vertical transitions from ceiling or floor sleeves are required within the Communications Room. Addendum 4 Section Page 3 of 5

4 3.2 INSTALLATION A. Provide all required supports, fittings and accessories for a complete system as described in NEMA VE-2, by Code, manufacturer recommendation or as shown on the plans, whichever is most restrictive. 1. Cable Tray. Provide with a complete system of accessories, including UL Classified splice kits, radiused corners at vertical and horizontal bends, section splice plates, expansion plates, blind-end plates, etc. Provide waterfall drop-outs at each end of cabling racks and cabinets indicated on the plans scheduled or indicated to terminate open wiring systems. 2. For wire basket tray, provide a complete system of accessories, including bonding and grounding connections, conduit connectors, to terminate conduits extended to basket edge, radius shields to protect cabling at inside corners, and waterfall drop-outs at each end of cabling racks and cabinets indicated on the plans scheduled or indicated to terminate open wiring systems. B. Bond sections to one another and to building ground. Provide external grounding strap at expansion joints, sleeves, crossovers and at other locations where tray continuity is interrupted. C. Access Clearance. Maintain access for use by Owner's personnel to tray as described below. Coordinate installation with work of structural, mechanical, plumbing/fire protection and electrical trades to maintain required access. 1. Unless shown otherwise on the plans, provide a clear access of at least 24" wide along one side of each tray for use by Owner's personnel. 2. Unless shown otherwise on the plans, installation to maintain at least 12" vertical clearance over the top of each tray for use by Owner's personnel. 3. A minimum of 3 of clearance from the top of the finished ceiling to the bottom of the cable tray shall be provided. D. Provide conduit to tray fitting at each conduit entrance to tray or maximum 8 of vertical drop to cable tray. 3.3 SUPPORT A. Support in accordance with the most restrictive of the following: 1. Contractor s engineered means of engineered support submitted in accordance with the requirements of Common Work Results for Communications and Section Hangers and Supports for Communications Systems. 2. California Building Code. 3. Metallic Cable Tray: NEMA VE , or latest edition 4. Fiberglass Cable Tray: NEMA FG , or latest edition. B. Provide a safety-loading factory of 1.5 for uniformly distributed loads when supported as a simple span in accordance with the NEMA standard listed. C. Size support member within load rating of member section; and without visible deflection. Install cable tray level and straight. D. Provide lateral sway bracing as required by Code. 3.4 PENETRATIONS A. Install firestop wall frames around cable tray at penetrations through fire rated walls, and where called for. Seal these openings with pliable fire resistant sealant. Addendum 4 Section Page 4 of 5

5 B. Cable Trays shall not penetrate any firewall or fire-rated soffits without the means to maintain existent wall fire rating. At such conditions, provide a listed through penetration system with equivalent cross sectional area to the tray being interrupted. 3.5 FIBER RUNWAY INSTALLATION A. Install runway system in accordance with Manufacturers installation instructions, plumb with floor, and with no visible seams, or field cut joints marks visible in completed system. Align major runs horizontally with cabinets and racks as indicated and maintain visible straight lines in the completed installation. Smooth off field cuts to remove burrs or cover completely with Fiber Runway Manufacturer s splicing plates/system. END OF SECTION Addendum 4 Section Page 5 of 5