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EIA/TIA 569

Design Considerations forTelecommunications

Pathways and Spaces

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ELCM 254PRGodin @gmail.com

Updated January 2012

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EIA/TIA 569

A communications infrastructure in todayscommercial buildings is essential. All buildings,new and old, must have allowance for this

infrastructure.

This standard addresses the architectural designelements ofcable pathways and dedicated

rooms for telecommunications equipment.

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EIA/TIA 569

The TIA/EIA 569 recommendations include: Physical Characteristics: Backbone and Horizontal pathway systems such as

conduit and tray

Entrance Facilities Room space, size, conditions and design

Installation and Performance Issues:

Backboard installation

Electromagnetic Interference Firestop

Cable management and physical support

Other factors that may affect cable performance

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Entrance Facilities

Includes service entrance, interbuildingbackbone, alternate entrance and antennaeentrance pathways.

Consist of a termination field interfacing anyoutside cabling to the intrabuilding cabling.

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Service Entrance A service entrance is where outside companies

physically bring their services into a building.

Electrical (power, ground)

Communication (Voice, Video, Data)

Alarm (Fire, Security) Wireless equipment connections (antenna)

Other services outside of communications (water,gas, etc)

There may be more than one Service Entrancefacility in a building.

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Demarcation on Service Entrance

The Demarcation (Demarc) is the separationbetween the service companys cabling and thebuilding internal cabling structure.

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Telco Cable Building Cable

Telco Bldg

Demarc

Telco Ownership Building Ownership

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Room General Guidelines

Located away from sources of electromagneticinterference and sources of flooding

No false ceilings.

Should have limited, secure access (36 X 80single or double lockable doors).

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Room Guidelines

There are many additional guidelines addressedspecifically in the standards. Factors include:

Humidity, temperature, vibration and dust controls

Physical access issues, security and fire suppression Lighting and electrical requirements

Ceiling height, construction, paint color

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Building Entrance Facility

Must contain protection against:

Lightning

Water

Humidity Fire Spread

Tampering

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Entrance Facility Cables and Safety

Local fire regulations will dictate terminationrequirements and fire protection.

Recommendation is terminate as close to the

entrance as possible. Fire control systems should be implemented.

If the cable contains metallic elements it must be

lightning protected, even if buried.

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Entrance Facilities

Includes service entrance,

interbuilding backbone,alternate entrance andantennae entrancepathways.

Consist of a terminationfield interfacing anyoutside cabling to theintrabuilding cabling.

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Entrance Facilities (Details)

Recommendation and Standards:

One wall must contain a inch sheet of plywood,painted white.

Must not have false ceiling Has minimum standards for lighting, door size andoverall space.

The service entrance pathway is either

underground, buried, aerial or tunnel. Must be secure.

Must avoid electrical cable pathways.

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Entrance Facilities (Details)

Recommendation and Standards:

Minimum conduit size:

Minimum 4 conduit of PVC type B,C, or D ormultiple plastic duct or galvanized steel or fiberglass(all with appropriate encasement)

No more than 2 - 90 manufactured bends (10times the diameter of conduit)

Drain slope:

should not be less than 12 per 100

Conduit fill varies

should not exceed 40% for more than 2 cables

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Entrance Facilities (Details)

For buildings > 20,000 usable square feet, alocked, dedicated, enclosed room isrecommended

Buildings greater than 70,000 usable square feetrequire such a room with a plywood terminationfield installed on 2 walls.

Up to 100,000 square footage, a wall mounted

termination field may serve as the entrancefacility (3/4 and 8 high) Beyond 100,000 square footage, rack mounted

and free standing frames may be required.

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FYIOnly

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Equipment Room

The Equipment Room is a facility which housesitems of more complexity such as:

Telephone related equipment such as an MDF

(Main Distribution Frame), PBXs (Private BranchExchange), secondary voltage protection, and thelike.

Networking equipment such as switches, hubs,

routers, servers, etc., although a separate butconnected computer room is usual.

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Equipment Room Size

The rule of thumb is 0.75 square feet of floorspace for every 100 square feet of user area.

Recommendation:

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# Workstations ER Floor Space (ft2)

1-100 150101-400 400

401-800 800

801-1,200 1,200

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Equipment Room Details

It should be accessible for delivery of large itemsbut shall not be used as access to other rooms orfacilities.

It should contain a wall with inch plywood.

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Equipment Room Guidelines Away from sources of electromagnetic

interference

Avoid sources of flooding

All surfaces should be treated to reduce dust and

there should be no false ceilings Should have limited access (36 X 80 single or

double lockable doors)

Humidity, temperature , lighting and electrical

considerations must be addressed.

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Typical Telecom Room

Image Source: Anixter.com

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Pathways

Allowances must memade for thephysical routing ofcommunication

cabling throughoutthe building.

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Cable Pathway Planning

Building Pathways:

Vertical & Horizontal cable pathways

walls, ceiling, plenums, floors

Exterior or interior

Cable Pathway and Support Structures:

Conduit, raceway, tray, duct, sleeves, etc

J-Hook, clamps, cable shoes, waterfall, etc

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Backbone Pathways

Telecommunication Rooms should be stackedvertically and 3, 4-inch conduit or other cablepathways provided between these rooms.

Firestopping is required between verticallystacked rooms.

For rooms that are not stacked they should beconnected with a minimum of 4 inch conduit. Fillshould not exceed 40%.

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TIA/EIA 569A Conduit Systems

Flexible metal tubing is not recognized

Should not be more than 30 meters install a pull box for greater distances

No more than two 90 degree bends Typical fill ratio between 30-60%, recommend

40% max

Diameter of 4 min. should be used underground

manholes within first 150 meters no more than 300 meters between manholes

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Conduit (continued)

Flexible metal tubing is not permitted

Should not be longer than 30 meters

install a pull box for greater distances

4 min. should be used underground

manholes within first 150 meters

no more than 300 meters between manholes

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Architectural Masterformat

The Masterformat is a reference document used byarchitectural engineers when designing a building.

The communication infrastructure is part of theMasterformat under Division 27 (since 2004).

Other cabling requirements have their owndivision numbers: Security & safety (28) Electrical (26) Automation (25)

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Conclusion

The TIA/EIA 569-B is a structured cablingstandard that addresses the physicalrequirements and design issues for pathways and

spaces for cable within a building.

Since each building and installation has uniquechallenges, the standard is frequently used as a

guideline and not the rule.

END