Minneapolis Public Schools



SECTION 27 11 00COMMUNICATIONS EQUIPMENT ROOM FITTINGS - GENERALSUMMARYSection includes:Telecommunications mounting elementsBackboardsTelecommunications equipment racks and cabinetsSafety and Performance GroundingPathways and Fire-Rated PathwaysPower StripsUninterruptible Power Supply (UPS) EquipmentDEFINITIONSBICSI: Building Industry Consulting Service InternationalDCDC: Data Center Design ConsultantLAN: Local area networkPDU: Power Distribution UnitRCDD?: Registered Communications Distribution DesignerACTION SUBMITTALSProduct Data: For each type of product.Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for equipment racks and cabinets.Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories.Shop drawings: For communications equipment room fittings. Include plans, elevations, sections, details, and attachments to other work.Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.Equipment Racks and Cabinets: Include workspace requirements and access for cable connections.Grounding: Indicate location of grounding bus bar and its mounting detail showing standoff insulators and wall mounting brackets.Operating and Maintenance Manuals:Content:Approved shop drawings or product data sheets alone are not to be considered as acceptable maintenance material. Most items of equipment are shipped with installation/maintenance sheets included in the shipping package which shall also be included into the maintenance manual.Special warranties.Tests and commissioning data of every system as called out herein after Engineer review.QUALITY ASSURANCEInstaller Qualifications: Cabling Installer must have personnel certified by BICSI on staff.Layout Responsibility: Preparation of Shop Drawings shall be under the direct supervision of an RCDD.Installation Supervision: Installation shall be under the direct supervision of a Level 2 Installer, who shall be present at all times when Work of this Section is performed at Project site.Field Inspector: Currently registered by BICSI as RCDD to perform the on-site inspection.Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.Telecommunications Pathways and Spaces: Comply with TIA/EIA-569, latest edition.Grounding: Comply with TIA/EIA-569 and ANSI/TIA-607, latest editions.PROJECT CONDITIONSEnvironmental Limitations: Do not deliver or install equipment frames until spaces are enclosed and weather tight, wet work in spaces is complete and dry, and work above ceilings is complete.COORDINATIONCoordinate layout and installation of communications equipment with Owner's telecommunications and LAN equipment and service suppliers. Coordinate service entrance arrangement with local exchange carrier.Meet jointly with telecommunications and LAN equipment suppliers, local exchange carrier representatives, and Owner to exchange information and agree on details of equipment arrangements and installation interfaces.Record agreements reached in meetings and distribute them to other participants.Adjust arrangements and locations of distribution frames, cross-connects, and patch panels in equipment rooms to accommodate and optimize arrangement and space requirements of telephone switch and LAN equipment.Adjust arrangements and locations of equipment with distribution frames, cross-connects, and patch panels of cabling systems of other communications, electronic safety and security, and related systems that share space in the equipment room.Coordinate location of power raceways and receptacles with locations of communications equipment requiring electrical power to operate.Recorded agreements, equipment arrangement adjustments, and power coordination shall be provided with submittal information prior to approval by Architect/Engineer. - PRODUCTSMANUFACTURERSManufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include:Belden IncChatsworth Products IncCommscopeHoffmanHubbell Premise WiringLevitonMiddle Atlantic Products, IncOrtronics, IncPanduit CorpThe Siemon CompanyPATHWAYSCable Support: Nationally Recognized Testing Laboratory (NRTL) labeled. Cable support brackets shall be designed to prevent degradation of cable performance and pinch points that could damage cable. Cable tie slots fasten cable ties to ply with NFPA 70 and UL 2043 for fire-resistant and low-smoke producing characteristics.Support brackets with cable tie slots for fastening cable ties to brackets.Lacing bars, spools, J-hooks and D-rings.Cable zip ties shall not be installed.BACKBOARDSBackboards: Provide void-free, interior grade A-C Plywood, 3/4 by 48 by 96 inches, or as indicated. Comply with requirements for plywood backing panels specified in Section Specifying "Rough Carpentry.”Backboards shall be fire rated by manufacturing process. Fire stamp shall be clearly visible. Paint applied over fire retardant backboard shall be UL 723 fire retardant paint. Paint all sides of the backboard. Provide label including paint manufacturer, date painted, UL listing and name of Installer. When painted, paint label and fire stamp shall be clearly visible.Backboards shall be provided on a minimum of two adjacent walls in the telecommunication spaces or as indicated.EQUIPMENT FRAMESGeneral Frame Requirements:Distribution Frames: Freestanding and wall-mounting, modular-steel units designed for telecommunications terminal support and coordinated with dimensions of units to be supported.Module Dimension: Width compatible with EIA 310-E standard, 19-inch panel mounting and a minimum usable depth of 22.8 inches.Racks, Cabinets, HardwareEquipment Racks and Cabinets: Provide racks and cabinets as specified herein and/or described in accompanying documents, appendices, or drawings. Verify any existing racks and/or cabinets provided by others are complete, bringing any discrepancies to the attention of Owner and Consultant prior to installation.Shelves and Mounts: Contractor shall supply necessary mounting hardware to install rack-mounted equipment. Mounting hardware shall be a product of the manufacturer of the equipment to be mounted, or manufacturer of the rack system, or approved by either for use with their product. Provide supporting channels, shelves, rack mounts, and/or rack ears as recommended by equipment manufacturers.Screws and Washers: Contractor shall provide screw head types appropriate to the level of security required for the equipment and racking. Screws shall include polyethylene or nylon washer.Public Access Areas: Star post or square post security screws shall be used for hardware and equipment mounted in equipment racks and consoles in areas that are accessible to the public.Restricted Access Areas: Philips head screws may be used where a secure room entrance or locked rack/console door prevents public access.Cabinets / Equipment EnclosuresFull HP 42U server rack with caster wheels, 120V rack roof mounted fan, and rack light option installed for high schools and middle schools. (23.54”w x 44.3”d x 78.97”h)Half size HP 22U server rack with caster wheels, 120v rack roof mounted fan, and rack light option installed for other sites (23.54”w x 44.3”d x 43.64”h)Where shown on Drawings, provide floor mounted enclosed equipment cabinets. Cabinets shall be designed to accept industry standard 19-inch equipment. Cabinets shall include removable side panels, ventilated rear door, top panel with cable access cutouts, front and rear equipment mounting rails, and accessory hardware. Where required for security, provide a hinged ventilated locking front door.Middle Atlantic, DRK19-44-31 or equivalentMiddle Atlantic, LVFD-44, Ventilated Door or equivalentFan Panels: Where required for cooling of system electronics, provide a thermostatically controlled fan panel. Panel shall have 100 cfm cooling capacity, variable fan speed, and digital readout of temperature.Part Number:Middle Atlantic, UQFP-4D or equivalentRacks / Open Rail 2-Post EquipmentStandard 84” x 19” 2 post rack with vertical cable management on the left and right sides.2 vertical 110v PDUs on the back of the work rack must be grounded and additional grounding bar be installed on plywood wall of network work rack must include a rack mounted, network managed UPS.Part Number:Middle Atlantic, RL10-45 or equivalentCable Management for Equipment Frames:Metal, with integral wire retaining fingers.Baked-polyester powder coat finish.Vertical cable management panels shall have front and rear channels. Panels shall be composite plastic, UL 94V-0 flame retardant with integral cable routing fingers at 1-RU intervals, black in color, 4” wide, 7’ high, double-sided (front/back) with covers on both sides, with integral wire retaining fingers.Provide horizontal crossover cable manager at the top of each relay rack, with a minimum height of two rack units each.Provide single sided cable management duct management systems for each floor mounted rack and cabinet. Ducts shall be 6 inches wide and 6 inches deep per section. Provide covers for all vertical cable organizers.Part Number:Middle Atlantic, CK-45, Center Organizer or equivalentPart Number:Middle Atlantic, CK-45E, End Organizer or equivalentPart Number:Middle Atlantic, CK-45C, Organizer Cover or equivalentMounting Hardware: Provide 10/32 machine screws with salt spray resistant matte black finish, truss head, 3/4 inch long, self-guiding pilot point and plastic washers to protect equipment finish. Provide (80) for each rack and cabinet.Part Number: Middle Atlantic, HG or equivalentPOWER DEVICESPower Strips: Unless otherwise specified, power strips shall be UL listed, surface mounted, rated for 20 amp continuous electronic loads. Outlets shall be 125 volt, 20 amp, three-wire, grounded, NEMA 5-20R. Cords shall be 12/3 SJT with molded plug.Power Distribution Panels: Unless otherwise specified, power distribution panels shall be UL listed, rack mounted, rated for 20 amp continuous electronic loads with switch and pilot light. Up to eight outlets shall be mounted to the back, each rated 125 volt, 20 amp, three-wire, grounded, NEMA 5-20R. Switch and pilot shall be mounted to the front. Cords shall be 12/3 SJT with molded plug.Contractor shall provide acceptable power distribution units as required in order to provide sufficient outlet connectivity for Contractor-furnished and Owner-furnished equipment indicated on drawings and equipment schedules, plus up to 15% additional capacity for future growth. This may be in addition to any power distribution equipment indicated on equipment schedules.For Server equipment, provide two separate dedicated NEMA 5-20R 20 amp 120v circuits for two 20 amp network managed rack mounted on 2200VA 2U 120v APC UPS with NEMA 5-20P plugs, one of the UPS devices must have a temperature probe. SMT2200RM2U UPS is recommended.For Network equipment installed in 2-post racks, provide rack mounted 1500VA/10000W 120V APC UPS. Provide minimum of (1) per communications rack or as shown on drawings.Wall receptacles must be placed within 5’ of server rack but not on or in the server rack as it can be moved. Preferably directly behind and by the side of the rack. 2’ maximum heights from the finished floor.Electrical Power Strips: Provide prewired electrical outlet power strips for each rack and cabinet. Wired for 20 amp circuits. Strips shall have 9-foot long flexible cord with 20 amp plug (5-20R). Strips shall have (12) receptacles (6 for wall cabinets) spaced along length of strip. Plug outlet strip into UPS system mounted in rack or cabinet.Part Number:Middle Atlantic, PDT-1220C-NS or equivalent, for floor standing racks and cabinets. Provide (2) per rack or cabinet.Part Number:Middle Atlantic, PDT-620C-NS or equivalent, for wall cabinets and half height racks. Provide (2) per cabinet or rack.CABLE MANAGEMENTPlastic Cable Ties: Single use white nylon plastic cable ties, appropriate screw fittings, or mounting clips may be used for AC power cable management within racks and enclosures. Plastic/nylon cable ties shall not be used for signal and DC cables.Velcro Cable Ties: Velcro straps shall be used for all signal and DC cables. Velcro straps shall be black, with no logo or decoration, except as authorized by Consultant.Ladder Racking: 12-inch wide cable support rack with supports at 9-inch intervals minimum. Provide hardware and fixtures to support from wall, ceiling (trapeze style), and above cabinets and racks as required for each application. Provide junction and splice hardware. Provide transition accessories as required for each application. No center hung ladder rack will be accepted.Part Number:Middle Atlantic, CLB SeriesANCILLARY HARDWAREGeneral: Contractor shall provide ancillary and required accessory items necessary to furnish a complete and fully functional system to Owner.Interpretation: Exclusion of or limitation in the language used in the drawings or specifications shall not be interpreted as meaning that ancillary or accessory items of work or equipment necessary to complete or make the installed system fully functional can be omitted.GROUNDING HARDWARERefer to Section 26 for specific Grounding and Bonding requirements.Provide data/telecommunication grounding systems indicated in the project drawings and specifications. Products shall include, but are not limited to, cables/wires, connectors, terminals, compression lugs, grounding rods/electrodes and plate electrodes, bonding jumper braid, surge arresters, and additional accessories needed for a complete installation. Where materials or components are not indicated, provide products complying with NEC, UL, IEEE, ANSI/TIA and established industry standards for applications indicated.FIRESTOPPING MATERIALSAll penetrations of walls shall be approved by the General Contractor before any penetrations are made. Should the Contractor find it necessary to penetrate any walls extending to the slab, it will be the responsibility of that Contractor to provide satisfactory sleeving and fire caulking both inside and outside of that sleeving. If existing sleeving is to be utilized, it will be the responsibility of the Contractor to fire caulk inside the sleeving. All penetrations through any wall or floor shall have a sleeve with a bushing on each end. Floor sleeves must extend a minimum of 4” above finished floor.The Contractor is responsible for adhering to the following standards:Conduit penetrations through fire-rated or smoke walls: Completely seal around the conduit penetration with Hilti FS 601 fire-rated sealant, Tremco or 3M.Conduit sleeves through fire-rated or smoke wall: Completely seal around the conduit penetration with Hilti FS fire-rated sealant, Tremco or 3M. Completely seal inner opening of the conduit sleeve with fire wool packing and Hilti FS 611A intumescent firestop sealant.Cable bundles must pass through fire-rated or smoke rated walls within sleeves: Completely seal openings with Hilti FS 611A intumescent firestop sealant, Tremco or 3M.Cable tray penetrations through fire-rated or smoke walls: Completely seal openings with Hilti FS 635 (trowelable type), Tremco or 3M.A submitted response to this specification assumes that all firestopping will be provided as specified. The firestop manufacturer’s specifications and instructions shall be submitted with the final documentation.LABELINGLabeling shall meet requirements of EIA/TIA 606, latest edition.Identify each outlet and associated termination point on the blocks with the following label format. Labeling shall be by a permanent labeling method. Hand labels are not acceptable. Outlet identification shall be applied to the outlet faceplate and protected by a clear plastic cover.Floor number, TR or TE number, followed by a dash and patch panel identifier, followed by a dash and number of outlet on patch panel (if multiple outlets are in the room).Closet End Example:On Backboard of TR in Large Block Lettering: ”2A“ for Second Floor, Room AOn Patch Panel C for Patch Panel C of A, B, C, etc.Label of Outlet ”23" for Outlet Number on Specific Patch Panel.Naming to be used is: Network Closet # - Room # - Drop # (example: 01-105-D1)Outlet plate labeling shall be printed on paper inserts that are fitted into label windows on plates. Lettering shall be 3/16-inch high munications equipment racks, cabinets, fiber enclosures, and termination equipment shall be clearly labeled.Equipment racks and cabinets shall have 3/4-inch high lettering and shall be labeled with the telecommunications room number followed by an alphanumeric character of the rack or cabinet number within the telecommunications room numbered consecutively left to right.Fiber shelves and patch panels shall have 1/2-inch high lettering labeled with the telecommunications room number followed by an alphanumeric character of the rack or cabinet number within the telecommunications room and the patch panel number numbered consecutively top to bottom.Identify each cable by Communications Rooms, consolidation points, and closets they connect. Identify both ends of each cable.Contractor must meet with Owner’s IT department to discuss labeling prior to cable installation.- EXECUTIONENTRANCE FACILITIESContact telecommunications service provider and arrange for installation of demarcation point, protected entrance terminals, and housing when so directed by service provider.INSTALLATIONComply with BICSI TDMM for layout and installation of communications equipment rooms.Bundle, lace, and train conductors and cables to terminal points without exceeding manufacturer's limitations on bending radii. Install lacing bars and distribution spools.Pathways, Sleeve and Sleeve Seal installation: Comply with requirements of Division 26.Install sleeves and sleeve seals at penetrations of exterior floor and wall assemblies. Comply with requirements of Division 26.Wiring Method: Install cables in raceways and cable trays except within consoles, cabinets, desks, and counters Conceal raceway and cables except in unfinished spaces.Install plenum cable in environmental air spaces, including plenum ply with requirements for cable trays specified in Division ply with requirements for raceways and boxes specified in Division 26.Wiring Method: Conceal conductors and cables in accessible ceilings, walls, and floors where possible.Wiring within Enclosures: Bundle, lace, and train conductors to terminal points with no excess and without exceeding manufacturer's limitations on bending radii. Install lacing bars and distribution spools.Provide Ladder Type cable Tray for Communication Rooms, routed above equipment racks and cabinets.Coordinate with Mechanical for AC system capable of cooling the room to 75 degrees F all year round, including winter months within telecommunication spaces.RACKS, CABINETS AND HARDWARERacks and Cabinets: Contractor shall assemble and install racks and cabinets. Racks shall be anchored to the floor and or the wall.Installation Hardware: Install hardware in a secure manner. Screws shall be tightened to a torque just sufficient to secure equipment without deforming washers beyond their original diameter.Considerations: Rack mount equipment shall be secured as recommended by the manufacturer with consideration to airflow, power, and in/out connections.Cross Connections: Where cross connections are required between equipment, interconnections shall be installed using cable management devices to secure cables in a neat and workmanlike manner, applying best industry practices.Server rack must be located in a dedicated, always locked room and cannot be used for storage, office space, or located in a common area.There must be at least 30” clearance front and back and 10” clearance side to side.CABLECable treatment: Cable shall be stored and handled to assure that it is not stretched, kinked, crushed, or abraded in any way. Bend radiuses shall meet manufacturer specifications and/or recommendations. Cable shall not be installed in ambient temperatures or moisture conditions above or below the rating of the manufacturer.Splicing:Voice, data, and other twisted pair cables: No splices shall be installed in any voice, data or twisted pair cables.Technology systems: No splices shall be installed in any cable less than five hundred (500) feet in length.Digital multimedia/video cables: No splices are allowed in any digital multimedia/video cable.Overhead paging systems: Cable splices for constant voltage overhead paging system shall occur only at speaker, amplifier or volume control knob locations.Lengths:Variations: Where cables are to be of the same length, variations in the length shall be less than plus or minus ? inch. Lengths of cables are based on the length of the unterminated signal conductors.Labeling: Cables, regardless of length, shall be marked with a labeling scheme approved by Owner.Grouping: Cables shall be separated into like groups according to signal or power levels.Power cables: Power cables shall be grouped to one side of the equipment rack while low-level cables to the other side.Equipment Racks: Equipment rack wiring and cabling shall be neatly dressed.Service Loops: A surplus of cable, typically located at or near the point of termination to facilitate potential future changes. Cables shall have a minimum cable slack of 10ft (3m) at the telecommunication room(s) and 3.28ft (1m) at each telecommunications outlet in the suspended ceiling unless noted otherwise. Service loops shall be stored in an extended loop or in a figure-eight configuration, not in bundled loops.Fastening: Rack cabling shall be adequately supported with Velcro wire wraps and horizontal support cable managers fastened to rack frame.External Wire Support: External wire and cables shall be supported at least every 5 feet from the structure or as required to maintain not more than a 12 inch cable sag between supports and without over tensioning the cables.Support Hardware: Cables shall be supported by J-hooks, cable tray, or ladder rack. Hardware shall be secured to building structure using 3/8” threaded rod supports.Right Angles: Cables are to run at right angles to the structure, placed above ceiling in halls or corridors.Height: Cables shall not run above red iron joist.Concealment: Contractor shall make every effort to conceal wiring and other apparatus into walls, floors, and ceilings, assuming code and good engineering practice allows and suggests. Cabling systems installed in public areas shall be installed within walls, ceiling, or floors or within surface wiring pathways, as dictated by codes and good engineering practice.Velcro Straps for Horizontal Cabling: Straps shall be installed snugly without deforming cable insulation. Straps shall be spaced at uneven intervals not to exceed 4 feet.Cable Ties and Velcro Straps within Equipment Racks and Cabinets: Ties and straps shall be installed snugly without deforming cable insulation at uneven intervals not to exceed 8 inches. Cable ties shall only be used for non-signal carrying cables. No sharp burrs shall remain where excess length of the cable tie has been cut.Obstruction: Contractor shall notify Owner immediately if any obstruction or hazard is discovered in a pathway provided by others.CONNECTORSPreparation: Cables shall be carefully prepared and connectors installed as directed by the manufacturer. Proper stripping devices and crimping tools shall be used.Terminations: Connectors shall be carefully fitted to mating devices on equipment to avoid damage to mating contacts, inserts, or bodies. Specialized terminations shall be made in a neat and secure manner suited to the service of the wire and as directed by the manufacturer. Contractor shall use manufacturer specified terminations when those specifications exist.Soldering: A person skilled in that practice shall execute soldered terminations. Any excessive insulation displacement resulting from soldering shall be grounds to require the Contractor to re-terminate the connector.Adapters: Adapters shall be used only where the identity of the necessary type of connector is unknown at the time of installation, such as for Owner-provided equipment or in anticipation of future equipment upgrades, with Consultant’s approval.FIRE RATED PATHWAY AND FIRESTOPPINGComply with requirements in Division 07 "Firestopping."Comply with TIA-569-B, Annex A, "Firestopping."Comply with BICSI TDMM, "Firestopping Systems" Article.Provide UL Listed Fire-rated Pathways:Provide fire rated riser and horizontal pathways in configurations and locations as shown on the drawings and where required to pass cabling through fire rated floors or walls.See Architectural code plan for locations of fire rated partitions.Provide a UL listed installation with an “F’’ rating that matches that of the partition.Manufacturer’s Instructions: Comply with manufacturer’s instructions for installation of firestopping and fire rated pathway products. Provide components and accessories necessary for a fire rated system, including wall plates, brackets, and gaskets. Provide filler panels for all unused or spare pathways.Provide ganged wall plates and riser plates for multiple pathway installations and label with manufacturer provided ply with BICSI TDMM, "Firestopping Systems" Article.GROUNDINGInstall grounding according to NFPA 70, National Electrical Code?.Comply with TIA-569 and ANSI/TIA-607, latest editions.Locate grounding bus bar to minimize the length of bonding conductors. Fasten to wall allowing at least 2-inch clearance behind the grounding bus bar. Connect grounding bus bar with a minimum No. 4 AWG grounding electrode conductor from grounding bus bar to suitable electrical building ground.Bond metallic equipment to the grounding bus bar, using not smaller than No. 6 AWG equipment grounding conductor.Bond the shield of shielded cable to the grounding bus bar in communications rooms and spaces.END OF SECTION 27 11 00 ................
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