AS 3745
Evacuation Diagrams
Evacuation diagrams are floor-plan-based signs showing exit routes, assembly areas, fire equipment locations and emergency information. Required by AS 3745, they must be posted throughout your building and kept current. Our engineers prepare diagrams that are accurate, compliant and clear.
What is an evacuation diagram?
An evacuation diagram is a standardised sign showing a simplified floor plan with marked exit routes, emergency exits, fire equipment locations (extinguishers, hose reels, hydrants), assembly areas, and emergency contact information. AS 3745 specifies the format, content and placement requirements.
Why do you need them?
AS 3745 requires evacuation diagrams to be displayed in all occupied buildings to assist occupants in locating exits and understanding evacuation procedures. They must accurately reflect the current building layout. Outdated diagrams can misdirect people during an emergency.
What AS 3745 requires
Each diagram must show: a simplified floor plan of the relevant level, primary and alternative exit routes, location of fire-fighting equipment, assembly area location, emergency contact numbers, a "You Are Here" indicator, and north orientation. Diagrams must be A3 minimum size and posted at key decision points.
Common problems we solve
Evacuation diagrams frequently become outdated after tenancy changes, renovations or equipment relocations. Common defects include: diagrams showing old floor layouts, incorrect exit routes, missing or relocated equipment, wrong assembly area information, and diagrams that don't comply with the current edition of AS 3745.
Frequently Asked Questions
How many diagrams does my building need?
AS 3745 requires diagrams at key decision points — typically at lift lobbies, main entries, stairwell entries, and at regular intervals along corridors. The number depends on your building layout and floor plate size.
What size must evacuation diagrams be?
AS 3745 specifies a minimum A3 size for wall-mounted evacuation diagrams. Smaller sizes may be used in specific situations (e.g., behind hotel room doors) but the default requirement is A3.
How often should diagrams be updated?
Evacuation diagrams must be updated whenever the building layout changes, exit routes are modified, fire equipment is relocated, or the assembly area changes. A regular review should be part of your emergency planning.
Do you provide print-ready files?
Yes. We deliver diagrams in print-ready PDF format suitable for professional printing at A3 size. We can also supply editable source files if required.