Optimizing Telecommunications Spaces : Sizing & Design Guidelines for Efficiency

Telecommunications spaces are the backbone of structured cabling systems in commercial buildings. Proper sizing and layout are critical for functionality, maintenance, and scalability. Here’s a practical guide based on international standards to help you design efficient and standards-compliant telecom spaces.

Recommended Room Size Based on Area Served

If serving ≤ 460 sq. meters (5,000 sq. ft), then

Size: 3m (10 ft) x 2.4m (8 ft)

Allows center placement of racks, cabinets, or enclosures.

If serving > 460 and ≤ 740 sq. meters (5,000–8,000 sq. ft), then

Size: 3m (10 ft) x 2.74m (9 ft)

If serving > 740 and ≤ 929 sq. meters (8,000–10,000 sq. ft), then

Size: 3m (10 ft) x 3.4m (11 ft)

Key Design Considerations for Telecommunications Spaces

Ceiling Height

• Minimum : 2.4m (8 ft) above finished floor (AFF)
• Recommended : 3m (10 ft)

Equipment Clearance

• Front & Rear of Rack : Minimum 1m (3.28 ft)
• Sides of Rack (especially in corners) : Minimum 300mm (12 in)

Wall-Mounted Equipment Access

• Minimum 1m (3.28 ft) clearance for installation and maintenance.

Conduits & Trays from Ceiling

• Should extend into the room 25.4mm – 51mm (1–2 in) without bends
• End height : 2.4m (8 ft) AFF.

Backboard Installation

• Plywood should be painted with two coats of fire-retardant, light-colored paint on all sides.

Rack Footprint

• Recommended per rack : 1m (3.28 ft) width x 1m depth x 2.3m (7.5 ft) height

Environmental & Lighting Recommendations

If passive space (no active equipment)

• Temperature: 10–35ºC
• Humidity: ≤ 85% RH

If active equipment present:

• Temperature: 18–24ºC
• Humidity: 30–55% RH

Lighting Requirements:

• Minimum: 500 lux (50 foot-candles) at termination points
• Fixture height: Minimum 2.6m (8.5 ft) AFF

Proper planning of telecommunications spaces ensures not only code compliance and safety but also makes future expansions, equipment access, and thermal management easier. Whether you’re building new or retrofitting, these guidelines provide a strong foundation for robust ICT infrastructure.