ANSI/TIA-569-E: Telecommunications Pathways and Spaces

This Standard provides generic requirements for telecommunications pathways and spaces. Included are separation and isolation considerations for operating environment compatibility, telecommunications facility diversification recommendations to ensure operation in catastrophic conditions, and temperature and humidity requirements.  Architectural (e.g. room size and firestopping) and environmental (e.g. HVAC,  grounding and bonding, and electromagnetic noise reduction) design guidance is also provided.

ANSI/TIA-569-E “Telecommunications Pathways and Spaces” was developed by the TIA TR‑42.3 Pathways and Spaces Subcommittee and published in May, 2019. This Standard specifies requirements for telecommunications pathways and spaces in commercial and multi‑tenant buildings, access provider spaces, and service provider spaces where entrance rooms, distributor rooms, enclosures, racks and cabinets and other telecommunications facilities and infrastructure is located.  Pathway locations include areas above the ceiling, access and cellular floor systems, cable support systems, underfloor duct and insert systems, perimeter pathways and surface mount pathways, and utility columns.

Significant changes from the previous edition include:

• Incorporation of revised temperature and humidity requirements from TIA‑569‑D‑1
• Addition of pathway and space considerations for support remote powering over balanced twisted‑pair cabling from TIA‑569‑D‑2.

Pathways and Spaces in a Single-Tenant Building

Distributor Room Sizing

• The distributor room shall be sized to meet known requirements such as the function of the room, the numbers of equipment and racks needed, and the number of equipment outlets that it will serve
• Sizing shall include projected future as well as present requirements
• A distributor room containing Distributor B should be sized at a minimum of 9 m² (100 ft²)
• A distributor room containing Distributor C should be sized at a minimum of 11 m² (120 ft²) in buildings with a gross area of up to 50,000 m² (500,000 ft²)
• In larger buildings, the size of the distributor room containing Distributor C should be increased in increments of 1 m² (10 ft²) for every increase of 10,000 m² (100,000 ft²) in gross building area

Minimum Floor Space Based on Number of Outlets Served

Temperature and Humidity Requirements

• ASHRAE Class A1, A2, A3, and A4 environmental requirements for telecommunications spaces are provided along with the additional guidance that temperature and humidity should be controlled to support continuous operation in the following ranges:
  • Temperature: 18 – 27°C (64 – 81°F)
  • Maximum relative humidity (RH): 60%
  • Minimum dew point: -9°C (16°F)
  • Maximum dew point: 15°C (59°F)
• Temperature and humidity specifications provided for distributor rooms, distributor enclosures, entrance rooms or spaces, access provider spaces, service provider spaces, and common distributor rooms are as follows:
  • Temperature: 5 – 35°C (41 – 95°F)
  • Minimum relative humidity (RH): 8%
  • Maximum relative humidity (RH): 80%
  • Maximum dew point: 28°C (82°F)

Click here for archive information on TIA-569-D.

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