Pathways_for_Communication_Systems.pdf

Greater Dayton RTA 06/28/2024

PATHWAYS FOR COMMUNICATIONS SYSTEMS 270528 - 1

SECTION 270528 - PATHWAYS FOR COMMUNICATIONS SYSTEMS

PART 1 - GENERAL

1.1 SCOPE OF WORK

A. Provide conduit raceway system, including underfloor and overhead distribution system, fish wire, terminal cabinets, outlet boxes, pull boxes, cover plates, conduit, sleeves and caps, miscellaneous and positioning material to constitute complete system, as indicated for distribution of Telecommunications wiring which includes cables for Data, Voice, Video, Audio, Security and future signal requirements.

B. The location at which all new telecommunications wiring will terminate is called a Telecom Outlet (TO). There are several styles of outlets:

1. New construction

2. Existing construction typical

3. Existing construction variations

4. Telephone (Voice) only

5. Data only

1.2 REFERENCES

A. The latest published versions as of the final issuance date of the Request for Proposal or Solicitation shall be in effect for the indicated references below.

1. ANSI/TIA-568 Commercial Building Telecommunications Cabling Standard

2. ANSI/TIA-569 Telecommunications Pathways and Spaces

3. ANSI/TIA-606 Administration Standard for the Telecommunications Infrastructure

4. ANSI C80.1 Rigid Steel Conduit - Zinc Coated

5. ANSI C80.4 Fittings for Rigid Metal Conduit

6. ANSI/NFPA 70/770 – National Electric Code – Optical Fiber Cables and Raceways

7. ASI/NFPA 70/250 - National Electric Code – Ground and Bonding

8. ASTM A 510 - Specifications for General Requirements for Wire Rods and Coarse

Round Wire, Carbon Steel

9. ASTM B 633 - Specifications for Electrodepositing Coatings of Zinc on Iron and Steel, Sections SC2 and SC3

10. ASTM A653 - Specifications for Steel Sheet, Zinc-Coated (Galvanized) by Hot Dip

Process

11. ASTM A123 - Specifications for Zinc (Hot Galvanized) Coatings on Iron and Steel

12. ASTM – A276-06 Standard Specification for Stainless Steel Bars and Shapes

13. ASTM A580/A580M-06 Standard Specification for Stainless Steel Wire

14. BICSI Electronic Safety and Security Reference Manual (ESSDRM), current edition

15. BICSI Information Transport Systems Installation Methods Manual (ITSIM), current edition

16. BICSI Network Design Reference Manual (NDRM), current edition

17. BICSI Telecommunications Distribution Methods Manual (TDMM), current edition

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18. BICSI Wireless Design Reference Manual (WDRM), current edition

19. CANSI/NFPA 70/645 – National Electric Code – Information Technology Equipment

20. UL and cUL E209183

1.3 QUALITY ASSURANCE

A. All cable and equipment shall be installed in a neat and workmanlike manner. All methods of construction that are not specifically described or indicated in the contract documents shall be subject to the control and approval of the Owner or Owner Representative. Equipment and materials shall be of the quality and manufacture indicated. The equipment specified is based upon the acceptable manufacturers listed. Where “approved equal” is stated, equipment shall be equivalent in every way to that of the equipment specified and subject to approval.

B. Strictly adhere to all Building Industry Consulting Service International (BICSI) and Telecommunications Industry Association (TIA) recommended installation practices when installing communications/data cabling.

C. Assure that the "as installed" system is correctly and completely documented including engineering drawings, manuals, and operational procedures in such a manner as to support maintenance and future expansion of the system.

D. Material and work specified herein shall comply with the applicable requirements of the current revision of the following:

1. ANSI/TIA-568 Commercial Building Telecommunications Cabling Standard

2. ANSI/TIA-569 Telecommunications Pathways and Spaces

3. ANSI/TIA-606 Administration Standard for the Telecommunications Infrastructure

4. BICSI – Telecommunications Distribution Methods Manual

5. J-STD – 607 Joint Standard for Commercial Building Grounding (Earthing) and

Bonding Requirements for Telecommunications

6. NFPA 70 – National Electric Code

1.4 SUBMITTALS

A. Product Data: For features, ratings, and performance of each component specified.

B. Submit manufacturer’s instructions for storage, handling, protection, examination, preparation, operation, and installation of products. Include application conditions or limitations of use stipulated by any product testing agency. Submit for the following:

1. Wall Boxes

2. Raceway

3. Conduit

4. Conduit Bushings

C. Shop Drawings:

1. Component List: List manufacturer, part number, and quantity of each component.

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2. When requested by Owner, include dimensioned plan and elevation views of equipment rooms, labeling each individual component. Show raceway assemblies, method of field assembly, workspace requirements, and access for cable connections.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Deliver materials to site in manufacturer’s original un-opened containers and packaging, with labels clearly indication manufacturer and material.

B. Storage: Store materials in a dry area indoors, protected from damage and in accordance with manufacturer’s instructions.

C. Handling: Protect materials and finishes during handling and installation to prevent damage.

PART 2 - PRODUCTS

2.1 TELECOM OUTLETS (TO)

A. New construction TO consists of one (1) 4-11/16" square by 2-1/8" deep surface mounted box.

Each outlet box shall have a EMT conduit ran continuous back to TR or ER. Conduits size is as follows:

1. For Outlets with 3 or less cables, use a 1” EMT conduit

2. For Outlets with 4-6 cables, use a 1.25” EMT conduit

3. For all other sizes and any installation other than CAT6, calculate fill ratio at 40% for proper sized conduit

B. The intent of the installation of the TOs which consist of the raceway is as follows:

1. Where ceilings are inaccessible or no ceilings exist, the raceway shall extend up as close to the deck as practical to allow installation of conduits as high as possible.

2.2 HORIZONTAL DISTRIBUTION SYSTEMS

A. All pathways shall be installed a minimum of six (6) inches away from any light fixture or other source of EMI (Electromagnetic Interference).

B. All pathways shall be grounded per NEC Article 250.

C. Provide external grounding strap at expansion joints, sleeves and crossover and at other locations where pathway/tray continuity is interrupted.

D. Support all pathways from building construction. Do not support pathways from ductwork, piping, or equipment hangers.

E. Install pathways level and straight unless noted on the construction drawings.

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2.3 STATION CONTROLS

A. Station conduit is defined as conduit that originates at the TO and rises or is exposed and routes to the final TR or ER.

1. Provide continuous station conduits from TOs to the TR or ER consisting of 1” EMT minimum or appropriate size as shown on the Drawings or as specified herein for installation of telecommunications cables.

2. Provide an insulating press fit bushing on all telecommunications conduits including interconnecting nipples and stub to distribution system. Where space permits, every effort shall be made to bend station conduits down such that the flow of installed cables promotes the minimum length back to the TR and the least amount of bends in the cables.

Bushings must be rated to be used in an environmental air handling space (Plenum).

3. Provide measured pull line in 12” increments in each empty conduit.

4. Indelibly mark station conduit at each wall/floor penetration with Room # that conduit serves.

5. The use of 90-degree electrical pulling elbows is prohibited.

6. Do not include more than two 90-degree bends between pulling points when installing station conduit runs. If the path of the station conduits requires more than 180 degrees of total bends, installation of an appropriate sized junction box is required. See section 2.4 for junction box requirements.

7. Place an appropriate sized junction box in each individual station conduit run that exceeds 100 feet in length.

8. The use of a third bend in a conduit is only acceptable if:

a. The total conduit run is reduced by 15%.

b. The conduit size is increased to the next trade size.

c. One of the bends is located within 12” of the cable feed end.

2.4 JUNCTION BOX REQUIREMENTS FOR STATION CONTROLS

A. If the station conduit route exceeds the 180 degree of total bends limitation, an appropriate sized junction box is required within a straight section of the conduit run.

B. Each station conduit run requires a separate junction box. The sharing of a junction box by multiple conduits is prohibited.

C. A junction box shall not be used in place of a bend. All junction boxes in station conduit paths shall be installed within a straight section of the conduit run.

2.5 FIRESTOPPING

A. In all buildings, floor/ceiling assemblies, stairs, and elevator penetrations must be sealed with a 2-hour fire stop assembly at a minimum, unless otherwise noted.

B. Contact Owner’s Representative to identify walls which are fire-rated construction. Walls must be sealed with a 2-hour fire stop assembly at a minimum.

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C. Communication pathways requiring fire stopping shall utilize removable/re-usable fire stopping putties for ease of Moves, Adds, and Changes.

D. All fire stopping penetrations shall conform to the recommended practices listed in UL1479 or

ASTM.

PART 3 - EXECUTION

3.1 GENERAL REQUIREMENTS

A. The intention of the telecommunications conduits is to provide a route between a TO and the ER and TR rooms for telecommunications cabling.

B. Installation of new pathways shall not interfere with existing pathways in such a way that installation of new cables within the existing pathway is made more difficult.

3.2 EXAMINATION

A. Examine areas to receive cable management system. Notify the Owner’s Representative of conditions that would adversely affect the installation or subsequent utilization of the system.

B. Do not proceed with installation until unsatisfactory conditions are corrected.

3.3 INSTALLATION

A. Install in accordance with recognized industry practices, to ensure that the equipment complies with requirements of the NEC, and applicable portions of NFPA 70B and NECA "Standards of Installation" pertaining to general electrical installation practice.

B. Coordinate installation with other trades.

C. Field verification is required before installation.

D. Install cable management system at locations indicated on the drawings and in accordance with manufacturer's instructions.

END OF SECTION 270528