NOTE TO ARCHITECT: S ARE NOT TO BE USED FOR FIRE ALARM, CLOCKS, BUILDING CONTROL WIRING, OR POWER. NOTE TO ARCHITECT: LAUSD INFORMATION TECHNOLOGY DIVISION IS THE ONLY COGNIZANT AUTHORITY FOR CHANGES OR MODIFICATION TO THIS SPECIFICATION. NO CHANGES OR MODIFICATIONS SHALL BE MADE WITHOUT SPECIFIC APPROVAL FROM ITD. NOTE TO PROJECT ARCHITECT: BOLDED SECTIONS AND TEXT IN BOXES MUST BE REMOVED PRIOR TO ASSEMBLING PROJECT MANUAL. PART 1 - GENERAL 1.01 SUMMARY SECTION 25135 A. Provisions of Division 01 apply to this section. B. Principal items of Work in this Section include but are not limited to: 1. Continuous, rigid, welded steel wire mesh cable management system. 2. Provide and install a complete cable tray system, including but not limited to tray sections, couplers, hangers, bonding and grounding, and structural calculations as required to provide a complete system. C. Related Sections: 1. Section 16010: Basic Electrical Requirements 2. Section 16050: Basic Electrical Materials and Methods 3. Section 16060: Grounding and Bonding 4. Section 16120: Low-Voltage Wire 600 Volt AC 5. Section 16130: Raceways and Boxes Fittings and Supports 6. Section 16515: Lighting Control Systems 7. Section 25720: Intrusion Detection System 8. Section 25723: Telecommunications Systems 9. Section 25725: CCTV - New Facilities SCHOOL NAME 25135-1
10. Section 25726: CCTV - Existing Facilities 11. Section 25568: Premise Wiring Existing Facilities 12. Section 25569: Premise Wiring New Facilities 13. Section 25821: Public Address and Intercommunication Systems 14. Section 25850: Television System - Existing Facilities 15. Section 25851: Television Systems - Digital 16. Section 25852: Television System (Fiber Optic Distribution) D. Acronyms: UL NRTL Underwriter s Laboratory Nationally Recognized Testing Laboratory 1.02 SYSTEM REQUIREMENTS A. Refer to Part 2. 1.03 SUBMITTALS A. Provide in accordance with Division 01. B. Shop Drawings: Submit Shop Drawings indicating materials, finish, dimensions, and accessories. Detail fabrication and installation of cable tray, including layout, sections of components and attachments to other construction elements. Designate components and accessories, including clamps, brackets, hanger rods, splice-plate connectors, expansion joint assemblies, straight lengths, and fittings. C. Product Data: Submit manufacturer s Product Data, including UL, or another NRTL classifications. D. Installation Documentation: Submit installation details for architect s review prior to start of installation. 1.04 CODES AND STANDARDS A. ANSI/TIA/EIA-568: Commercial Building Telecommunications Cabling Standard B. ANSI/TIA/EIA-569: Commercial Building Standard for Telecommunication Pathways and Spaces C. ANSI/TIA/EIA-606: Commercial Building Standard for the Telecommunications Infrastructure of Commercial Building SCHOOL NAME 25135-2
D. ANSI/TIA/EIA-607: Commercial Building Grounding and Bonding Requirements for Telecommunications E. BICSI Telecommunications Distribution Methods Manual, 9th Edition F. CCR Part 3 - California Electrical Code G. CBC Part 2 - California Building Code H. ASTM A 510: General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel. I. ASTM A 123: Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products J. ASTM A 569: Steel, Carbon (0.15 Maximum, Percent), Hot-Rolled Sheet and Strip Commercial Quality K. ASTM A 570: Standard Specification for Steel, Sheet and Strip, Carbon, Hot-Rolled, Commercial Quality L. ASTM B 633: Electrodeposited Coatings of Zinc on Iron and Steel M. National Uniform Seismic Installation Guidelines (NUSIG) 1.05 SYSTEM DESCRIPTION A. Furnish a continuous, rigid, welded steel wire mesh cable management system. The system shall be designed for installation on walls and ceilings with required mounting methods including, but not limited to, trapeze, side-hung, center-hung, and pipe stanchions. 1.06 QUALITY ASSURANCE A. Comply with the following as a minimum requirement: 1.07 WARRANTY 1. Ordinances and Regulations: The Work of this section shall conform to California Code of Regulations, Part 3, and other applicable codes and standards. 2. Installers shall be trained and certified by equipment manufacturer to install the products of this section. A. Provide a 2 year material and labor warranty. B. Provide a 10 year manufacturer s guarantee for availability of spare parts for installed system. SCHOOL NAME 25135-3
PART 2 - PRODUCTS 2.01 MANUFACTURERS A. GS Metals Corporation, Cablofil Inc., Chalfant Manufacturing Co. or equal. 2.02 CABLE MANAGEMENT SYSTEM A. Description: Furnish a continuous, rigid, welded steel wire mesh cable management system. The system shall be designed for installation on walls and ceilings with required mounting methods including, but not limited to, trapeze, side-hung, centerhung, and pipe stanchions. Furnished cable tray system shall include a full line of factory-supplied, electroplated supports, splices, and accessories. All system components shall be furnished through one source from a single manufacturer. 1. Mesh system permits continuous ventilation of cables and maximum dissipation of heat. 2. Continuous top wire safety edge kinked and T-welded. 3. Wire mesh welded at intersections. 4. Mesh sections furnished with one bottom longitudinal wire along entire length. B. UL Classification: Straight sections 2 inches x 6 inches, 8 inches, 12 inches, 16 inches, 18 inches, 4 inches x 12 inches, 16 inches, 20 inches, and 24 inches shall be UL classified as an equipment grounding conductor. C. Material: Carbon steel wire, ASTM A 510, Grade 1008. Wire welded, formed, and then surface treated. D. Welding Process and Weld Quality Testing: 1. A destructive weld test must be performed to verify strength of welds. This test must be performed on a welded sample of wires. Records including weld failure, lot number, and part number must be maintained on file for Owner review upon request. 2. Work not in accordance with destructive weld test will be deemed defective Work. E. Finish for Carbon Steel Wire: Install finish after welding and bending of mesh. 1. Electro-Plated Zinc Galvanizing: ASTM B 633, Type III, SC-1. 2. Hot-Dip Galvanizing: ASTM A 123. 3. Black E-Coat: electrolytic painted surface treatment. SCHOOL NAME 25135-4
4. Powder Coating: painted surface of ASA 61 polyester coating. F. Nominal Dimensions: 1. Mesh: 2 inches x 4 inches. 2. Straight Section Lengths: 118 inches. 3. Standard Widths: a. 12 inches: available in 1-1/2 inch, 2-inch and 4-inch depths. b. 16 inches, 18 inches, 20 inches, and 24 inches: available in 2-inch and 4-inch depths. 4. Standard Channel Depths: 4 inches and 6 inches. 5. Wire Diameters: 0.197-inch minimum on mesh sections. 6. Non-standard widths and depths shall be furnished as required. 7. Refer to Drawings for specific requirements for sizes and configurations. G. Fittings: Field fabricated and furnished from straight sections, in accordance with manufacturer s instructions. H. Hardware: Furnished by manufacturer including splice connectors and support components. I. Vertical and horizontal bend fittings (90 degree and otherwise) shall conform to TIA/EIA/568A bend radius requirements for Category 5E, UTP, and fiber optic cable. J. Cross members shall be furnished at not more than 6 inch intervals. K. Grounding and Bonding Conductor: Provide #6 AWG insulated solid copper conductor (green) to bond each end of all metallic pathways to the nearest telecommunications grounding busbar (TGB). L. Labels: Provide labels as recommended in TIA/EIA 606. Furnished labels shall be permanently color-coded with legible type produced by a digital printer. 2.03 ACCESSORIES A. Shielding Divider Strips: Furnish divider strips following contour of mesh sections to permit data PA/IC/telephone, and intrusion and television cables to be installed in the same tray. Pre-galvanized steel, 1-1/2 inches x 1-1/2 inches, 2 inches x 1-1/2 inches, 4 x 1-1/2 inches, 6 inches x 1-1/2 inches. B. Grounding: Grounding clip for continuous ground of cable management system. SCHOOL NAME 25135-5
PART 3 - EXECUTION AND INSTALLATION 3.01 INSTALLATION A. General 1. Work shall comply with the CBC, Uniform Fire Code, BICSI TDMM, and the California Electrical Code and ANSI/TIA/EIA, as well as local codes. B. Examination a. Cable tray installed for voice and data communications circuit distribution is not permitted to be utilized for electrical power or nonpower limited systems distribution as defined by the CEC. If installed voice and data cable tray is utilized for the distribution of other lowvoltage signal or power limited circuits, cable tray shall be furnished with metallic channel dividers with a minimum configuration of one channel dedicated to voice circuit distribution and a separate channel for data distribution. If other power limited systems are indicated to be installed, a separate divider shall be provided for each structured cable system unless specified otherwise. 1. Inspect areas to receive cable management system. Do not proceed with installation until unsatisfactory conditions are corrected. C. Installation 1. Install cable management system at locations indicated on the Drawings and in accordance with manufacturer s instructions. 2. Install and support cable management system as required by span load criteria. 3. Install cable management system with hardware, splice connectors, support components, and accessories furnished by the manufacturer. 4. Install cable tray routing as follows: a. Maintain a clearance of 6 inches between bottom of cable tray and ceiling grid or other equipment or raceways. b. Maintain a clearance of 4 feet to motors or transformers. c. Maintain a clearance of 1 foot to conduit or cables furnished for electrical power distribution. d. Maintain a clearance of 6 inches to fluorescent lighting. e. Install cable tray to perpendicularly cross over fluorescent lighting. SCHOOL NAME 25135-6
f. Cable tray supports shall be fastened to the structural ceiling or walls with hardware or other furnished installation accessories specifically designed for the cable tray, weight, and volume. Design supports, including fastenings to the structure, to carry the total calculated potential load. Brackets shall be installed at intervals not to exceed 5 feet on center. Installation shall comply with zone 4 seismic requirements. g. Do not fasten cable tray supports to ceiling support system or other mechanical and electrical support systems. h. Cable tray shall be installed without burrs, sharp edges, or projections, which may damage cable insulation. i. Radius supports shall be provided at drop-offs, bends, or rises. Provide for changes in direction and elevation with standard fittings, or as required. j. Cable trays installed on suspended rods longer than 2 feet in length shall be rigidly braced to prevent horizontal motion or swaying. k. When connecting tray sections manufacturer s specifications regarding size and number of splicing or connection hardware shall be strictly adhered to. l. Install expansion connectors where cable tray crosses a building expansion and/or seismic joint. 5. Slots and Sleeves (Wall Penetrations): a. Provide slots and sleeves where required for wall and floor penetrations of cable tray. Provide core drilling where required for installation. b. Provide firestopping material to maintain the fire rating of penetrated walls, floors, and ceiling structures. Firestop system shall be UL 1479 and ASTM 814 classified for though penetration applications of cable trays and raceways. 6. Grounding and Bonding: a. Work shall comply with the CBC, Uniform Fire Code, California Electrical Code, UL 467, and ANSI/TIA/EIA, as well as local codes which may specify additional grounding and/or bonding requirements. b. Bond metallic raceway at each end to the nearest grounding bus bar if cable tray is located in the MPOE or the MDF. Where the cable tray is located in other areas, bond to service ground. Ensure that bonding connects to bare metallic surface of painted metallic raceway. SCHOOL NAME 25135-7
3.02 CERTIFICATION AND TESTING c. Test cable trays to ensure electrical continuity of bonding and grounding connections. Submit two copies of test results for review and acceptance prior to substantial completion. A. Certifications and testing requirements are specified in individual requirements sections of this document. 3.03 PROJECT RECORD DOCUMENTS A. Supply one complete set of As-built drawings. Indicate red/blue line deviations from the Owner approved installation Drawings. 3.04 PROTECTION A. Protect the Work of this section until Substantial Completion. 3.05 CLEANUP A. Remove rubbish, debris, and waste materials and legally dispose of off the Project site. 3.06 OWNER ORIENTATION (IF REQUIRED) A. Completed Record Drawings, as specified in Section 3.03 above shall serve as the Owner s orientation. END OF SECTION SCHOOL NAME 25135-8