11.4 Consultant Coordination: Signage & Wayfinding

What Is Signage and Wayfinding?

Wayfinding is the process of navigating through a building or environment. Signage is the physical medium that supports wayfinding. The NCIDQ IDIX exam tests your ability to develop a signage program that is functional, code-compliant, and aligned with the design intent. This is a key part of Domain IV (Consultant Coordination, 18%).

Signage Types

A complete signage program uses five functional categories:

Code-Required Signage

Several codes mandate specific signage. The interior designer must know which signs are required and where.

Tactile Signage (ICC A117.1 Section 703)

Permanently mounted room signs must be tactile (raised characters and Braille) when the room is identified by a number or letter, or when the sign identifies a function. Key requirements per A117.1 Section 703:

• Raised character height: 5/8 inch (16 mm) minimum to 2 inches (51 mm) maximum
• Raised character depth: 1/32 inch (0.8 mm) minimum above background
• Case: Uppercase only for tactile characters
• Font: Sans serif, no italic or decorative
• Braille: Contracted (Grade 2), positioned below the text
• Mounting height: 48 inches (1220 mm) minimum to 60 inches (1525 mm) maximum above finish floor, measured to the baseline of the lowest and highest tactile characters
• Location at doors: On the latch side; double doors with one active leaf — on the inactive leaf; two active leaves — right of the right-hand door
• Clear floor space: 18 in x 18 in (455 mm x 455 mm) minimum, centered on the sign, beyond the door swing arc
• Contrast: Light-on-dark or dark-on-light; non-glare finish
• Pictogram field: 6 inches (150 mm) minimum height; text and Braille below the field

Exit and Egress Signage

Per the IBC and NFPA 101:

• Exit signs — Illuminated, green or red (jurisdiction-dependent), with letters at least 6 inches high and 3/4 inch stroke
• Egress path marking — Photoluminescent or electrically illuminated strips along exit paths in high-rise buildings (per IBC 403 and 1025)
• Directional exit signs — At every intersection where the path to an exit is unclear

Occupant Load Signage

Per IBC 1004 and NFPA 101:

• Maximum occupant load signs are required in assembly spaces where the occupant load is 50 or more
• Sign must be permanently mounted, legible, and state "Maximum Capacity: [number] Persons"
• Typically placed near the main entrance to the space

Wayfinding Strategy

A wayfinding strategy is more than a sign schedule. It is a system that uses architecture, landmarks, color, and signage to help people know where they are, where they are going, and how to get there. The four principles of wayfinding:

1. Orientation — The user knows where they are (landmarks, directories, "You Are Here" maps)
2. Route decision — The user can identify the path (directional signs, arrows, color coding)
3. Route monitoring — The user can confirm they are on the right path (repeated confirmation signs, landmarks)
4. Destination recognition — The user knows they have arrived (identification signs, room numbers)

ADA Pictograms

ADA signage uses standardized pictograms to communicate function without text. Common pictograms:

• Restroom (male, female, unisex, accessible)
• Accessible entrance (wheelchair symbol)
• Assisted listening (ear with sound waves)
• TTY (telephone with text)
• No smoking (cigarette with slash)

Pictograms must have a field at least 6 inches high, with no text or Braille inside the field. Descriptive text and Braille go directly below the pictogram field.

Signage Schedule

The interior designer produces a signage schedule that lists every sign in the project:

Coordination with Consultants

Signage coordination involves:

• Architect — Confirm room numbers, door types, wall construction
• Electrical engineer — Power for illuminated signs and exit signs
• AV consultant — Digital signage and interactive directories
• Code consultant — Confirm required signs and occupant-load calculations
• Local AHJ — Verify local amendments to IBC, NFPA 101, and A117.1

Exam Scenario

On the IDIX exam, expect questions that test your knowledge of A117.1 Section 703 tactile signage requirements — character height, mounting height, location at doors, and Braille placement. You may also be asked to identify which signage type a given sign belongs to, or to determine whether a space requires occupant-load signage. The key is knowing the difference between the five functional types and the specific code thresholds that trigger required signage.