Circulation Requirements Around Doors
A Practical Guide

Designing compliant and functional spaces requires careful consideration of accessibility - particularly in commercial and public environments such as workplaces, healthcare, and hospitality settings.

In Australia, accessibility is informed by the Disability Discrimination Act (DDA) and detailed within standards such as AS 1428.1, which set out requirements for equitable access.

One area where these requirements have a significant impact on planning is circulation space around doorways. Understanding how these spaces work not only ensures compliance, but can also help unlock more efficient and considered design outcomes.

The Four Key Factors

Circulation requirements around doors are primarily influenced by four key factors:

1. Door type
2. Direction of approach
3. Clear opening width
4. Direction of door swing

Each of these plays a role in determining how much space is required and how a doorway interacts with the surrounding layout.

1. Door Type

Door type refers to how the door operates and is installed. Different door types have varying clearance requirements under AS 1428.1, which can significantly affect spatial planning.

Common door types include:

• Hinged (swing) doors
• Sliding doors (cavity sliders)
• Sliding doors (surface-mounted)

Each type offers different advantages, particularly when working within tight spatial constraints.

2. Direction of Approach

The required circulation space varies depending on how a user approaches the door.

AS 1428.1 defines four primary approaches:

• Front approach – approaching the door directly head-on
• Latch-side approach – approaching from the side where the door latches
• Hinge-side approach – approaching from the hinge side
• Side approach (either side) – approaching from either side, but not front-on

Each approach results in different clearance requirements, which can be used strategically during planning.

3. Clear Opening Width

The clear opening width is the unobstructed width available when a door is fully open (typically at 90°). This is measured between the face of the open door and the doorstop.

Importantly, this is not the same as the nominal door leaf size. Hardware, hinges, and door thickness all reduce the effective opening.

• A minimum 850mm clear opening is generally required for an AS 1428.1-compliant doorway
• In practice, this typically requires a 920mm door leaf

However, increasing the clear opening width beyond the minimum (for example to 900mm, 950mm or 1000mm) can have a secondary benefit:

Larger clear openings can reduce the required circulation space around the door.

This relationship becomes a useful design tool when working within constrained layouts.

4. Direction of Door Swing

The direction in which a door swings has a direct impact on circulation requirements.

As a general rule:

• If the door swings away from the direction of approach, less circulation space is required
• If the door swings into the direction of approach, more space is needed

Hinged Doors

Front Approach

For a typical front approach to a hinged door, the required clearances are illustrated in Diagram 1.

Diagram 1:

In many standard conditions, this will result in:

• 530mm latch-side clearance
• 1450mm circulation depth in front of the door
• 110mm hinge-side clearance

Reducing Circulation Space

Where space is limited, circulation requirements can often be reduced by adjusting the door configuration. For example:

• Changing the approach direction (e.g. from front to side approach)
• Adjusting the door swing direction
• Increasing the clear opening width

These strategies can reduce the required depth in front of the door from 1450mm down to as little as 1140mm, as illustrated in Diagram 2.

Diagram 2:

Cavity Sliding Doors

Front Approach

Cavity sliding doors can offer spatial advantages over hinged doors.

For a front approach (illustrated in Diagram 3):

• There is no hinge-side clearance requirement
• This can simplify planning in tight areas

Diagram 3:

Side Approach

Alternatively, by adopting a side approach the required circulation depth can be reduced from 1450mm to as low as 1230mm, as shown in Diagram 4.

Diagram 4:

Surface-Mounted Sliding Doors

Surface-mounted sliding doors introduce an additional consideration: the thickness of the door leaf, measured from the face of the wall, must be added to the required clearances.

This affects:

• Circulation space in front of the door
• Latch-side clearance
• Sliding-side clearance

These relationships are illustrated in Diagrams 5 and 6.

Front Approach

Diagram 5:

Side Approach

Diagram 6:

Final Thoughts

Understanding how door type, approach direction, clear opening width, and door swing interact allows designers to move beyond basic compliance and make more informed planning decisions.

In many cases, small adjustments such as increasing door width or changing the direction of approach can result in meaningful space savings without compromising accessibility.

By using these principles strategically, it’s possible to design spaces that are not only compliant, but also more efficient and better resolved.