Professional accessibility compliance calculator for Australian standards
Calculate ramp gradients, door widths, circulation spaces, handrail heights, and accessible parking requirements to ensure AS 1428 compliance for 2026 Australian disability access regulations.
Ensure compliance with Australian accessibility standards for inclusive design
Instantly verify compliance with AS 1428.1, AS 1428.2, and AS 1428.4 standards for disabled access. Calculate ramp gradients, door widths, circulation spaces, and parking requirements to meet Building Code of Australia (BCA) accessibility regulations.
Designed for architects, builders, certifiers, and facility managers working on projects requiring disability access compliance. Includes all critical dimensions specified in AS 1428 for wheelchair access, mobility aid circulation, and accessible facilities.
Covers ramps, doorways, corridors, circulation spaces, accessible toilets, parking spaces, handrails, signage, and tactile indicators. Updated for 2026 Australian regulations including Disability Discrimination Act (DDA) requirements and Premises Standards compliance.
Select feature type and enter dimensions for compliance verification
AS 1428 is the suite of Australian Standards that specifies design requirements for access and mobility in buildings and facilities for people with disabilities. The standard ensures equal access for people using wheelchairs, walking frames, crutches, or other mobility aids. AS 1428 compliance is mandatory under the Disability Discrimination Act 1992 and the Building Code of Australia (BCA) for all new construction and major renovations in 2026.
The AS 1428 series consists of multiple parts covering different aspects of accessibility: AS 1428.1 addresses general requirements for access, AS 1428.2 covers enhanced and additional requirements, AS 1428.4 specifies tactile indicators, and AS 1428.4.1 deals with means of communication. For ramp construction, builders must also consider basement access ramp requirements which integrate AS 1428 standards with structural concrete specifications.
AS 1428 compliance is mandatory under the Disability Discrimination Act and BCA. Non-compliance can result in discrimination complaints, legal action, and building certification refusal. All public buildings and workplaces must meet minimum accessibility standards.
AS 1428 promotes universal design principles that benefit all building users, not just people with disabilities. Accessible design improves usability for parents with strollers, delivery personnel, elderly people, and anyone with temporary mobility limitations.
Approximately 18% of Australians (4.4 million people) live with disability. Proper accessibility design expands your facility's potential user base by millions while demonstrating social responsibility and legal compliance in 2026.
AS 1428.1 specifies maximum ramp gradients based on ramp category and vertical rise. Standard accessible ramps must not exceed 1:14 gradient (7.1% slope), meaning 14mm of horizontal length for every 1mm of vertical rise. For steeper applications, gradients between 1:8 and 1:14 are permitted with additional requirements including maximum rise limits and mandatory rest platforms. The Australian Building Codes Board enforces these standards through the BCA.
AS 1428.1 requires minimum clear width of 1000mm between handrails for accessible ramps, with 1200mm preferred for two-way traffic. Ramps must include level landings at top and bottom, with minimum dimensions of 1540mm × 1540mm to allow wheelchair turning. Rest platforms are required at maximum 9000mm intervals on long ramps, providing space for users to pause during ascent or descent.
Ramp surfaces must be slip-resistant, even when wet, with maximum cross-fall of 1:40 (2.5%). Edge protection is mandatory, consisting of kerbs minimum 75mm high or continuous handrails within 75mm of ramp edges. Surface materials must be stable and firm, avoiding loose gravel or materials that impede wheelchair movement. For outdoor ramps, drainage must prevent water accumulation on ramp surfaces.
AS 1428.1 maximum ramp gradient: 1:14 (7.1% slope) for standard accessible ramps
AS 1428.1 specifies minimum clear opening widths for accessible doorways based on location and function. General doorways require 850mm minimum clear width when open to 90 degrees, while main entrances need 1000mm minimum width. Clear opening height must be minimum 2040mm. Door hardware must be operable with one hand without tight grasping, pinching, or wrist twisting, mounted 900-1100mm above floor level.
Doorway approach spaces are critical for wheelchair users to maneuver into position before opening doors. AS 1428.1 requires minimum 1200mm clear space on the pull side of doors and 1540mm diameter turning circles within 500mm of the door handle. For automatic doors, sensor activation zones must cover the full approach space. When designing accessible entrances, consider how doorways integrate with alfresco slab levels to eliminate thresholds and ensure smooth transitions.
Accessible corridors must provide minimum 1000mm clear width for single-direction traffic, with 1200mm minimum for corridors where wheelchairs need to pass each other. Major circulation routes in buildings with high traffic should provide 1800mm minimum width. Corridors must maintain consistent width without narrowing, and any objects protruding from walls (fire extinguishers, displays, furniture) must not reduce clear width below minimum requirements.
Frequently missed AS 1428 requirements include: Insufficient maneuvering space at doors, handrail extensions not meeting 300mm beyond top and bottom of ramps, inadequate color contrast for tactile indicators, door hardware requiring tight grasping, thresholds exceeding 10mm height, and insufficient clear space in accessible toilets. Always verify all dimensions meet standards before construction.
AS 1428.1 requires minimum 1540mm diameter clear space for wheelchair turning maneuvers. This circular space allows wheelchair users to perform 180-degree turns without needing to reverse. Turning circles must be provided at corridor intersections, within accessible toilets, at ends of dead-end corridors, and near building entries. The space must be completely clear, with no door swing, fixtures, or obstacles encroaching into the 1540mm diameter.
When corridors are long (exceeding 15 meters) with minimum 1000mm width, AS 1428.1 requires passing spaces at maximum 30-meter intervals. Passing spaces must provide minimum 1800mm width over 2400mm length, allowing two wheelchair users to pass safely. Alcoves can serve as passing spaces if positioned appropriately, but door openings don't count as passing spaces unless they provide the required dimensions.
| Feature Type | AS 1428 Requirement | Minimum Dimension | Critical Notes |
|---|---|---|---|
| Access Ramp | AS 1428.1 Cl 10 | 1:14 max gradient, 1000mm width | Landings required every 9m, handrails both sides |
| Doorway Width | AS 1428.1 Cl 12 | 850mm clear (general), 1000mm (main) | Measured at 90° open, hardware 900-1100mm high |
| Corridor Width | AS 1428.1 Cl 7 | 1000mm single, 1200mm passing | Continuous width, no protrusions reducing clearance |
| Turning Circle | AS 1428.1 Cl 8 | 1540mm diameter | Required at dead ends, toilet entries, intersections |
| Handrail Height | AS 1428.1 Cl 11 | 865-1000mm (ramps), 865mm (stairs) | 30-50mm diameter, 50mm wall clearance, extensions required |
| Parking Bay | AS 2890.6 | 3200mm width × 5400mm length | 2.7% of total spaces, 1% must be accessible van spaces |
| Accessible Toilet | AS 1428.1 Cl 13-19 | 2300mm × 2500mm (ambulant: 1200mm) | Specific fixture locations, grab rails, circulation space |
| Tactile Indicators | AS 1428.4.1 | 300mm depth at hazards | Required at top of stairs, ramps, platform edges |
AS 2890.6 (referenced in AS 1428 compliance) specifies accessible parking bay dimensions and quantities. Standard accessible bays require minimum 3200mm width × 5400mm length, while accessible van parking needs 3800mm width to accommodate side-loading wheelchair lifts. The number of required accessible parking spaces is calculated as a percentage of total parking provided: minimum 2.7% of total spaces up to 100 spaces, then reducing percentages for larger facilities.
Accessible parking bays must be located on the shortest practical route to the accessible building entrance, with maximum 50-meter travel distance. The route from parking to entrance must be continuous accessible path with maximum 1:14 gradient. Bay surfaces must be firm, stable, and slip-resistant with maximum 1:40 (2.5%) cross-fall. Clear signage with the International Symbol of Access must be provided at each accessible bay.
Accessible parking bays must be clearly marked with high-visibility line marking, typically 100mm wide yellow or white lines. The International Symbol of Access (ISA) must be displayed prominently on bay surfaces and on vertical signs minimum 1500mm above ground. Signage must include "DISABLED PARKING ONLY" text and warnings about penalties for unauthorized use. In covered parking areas, vertical clearance must be minimum 2300mm for standard bays and 2700mm for van-accessible spaces.
Exceed minimum standards where possible: Provide 1200mm ramp widths instead of 1000mm minimum, use 1:20 gradients where site permits for easier wheelchair access, install power-assisted doors at main entrances, provide multiple accessible routes for redundancy, ensure excellent lighting on all accessible paths, use high-contrast materials for visual impairment, and design wider circulation spaces (1800mm+) in high-traffic areas. Better accessibility benefits all users.
AS 1428.1 requires handrails on both sides of ramps and stairs, mounted 865-1000mm above finished surface (900mm preferred). Handrail diameter must be 30-50mm for circular profiles, graspable by hand with thumb and fingers meeting. Wall clearance must be minimum 50mm to allow hand grip without knuckles hitting the wall. Handrails must extend minimum 300mm horizontally beyond the top and bottom of ramps and stairs to provide support before and after the slope.
Handrail material must be smooth without sharp edges, and temperature-stable (not excessively cold or hot to touch). Color contrast is required between handrails and background for visual identification. Handrails must support minimum 1.1kN horizontal force and 1.5kN vertical force. Installation must ensure structural adequacy, particularly when mounted on balcony slabs or lightweight wall systems.
Accessible toilets require specific grab rail configurations per AS 1428.1. Horizontal grab rails must be provided at 800-810mm height above floor level, with vertical rails at 1800mm height. Toilet pan side rails must be 600-700mm from wall centerline, while rear rails position 300mm from centerline. Grab rails must support minimum 1.1kN vertical force and be clearly distinguishable from background through color contrast or luminance difference.
Verify AS 1428 compliance using professional measuring tools, not estimates. Measure clear widths (not nominal dimensions), check gradients with digital inclinometers, verify all circulation spaces are completely clear of obstructions, ensure door hardware operates correctly, test slip resistance of surfaces, and confirm color contrast meets luminance requirements. Engage accredited access consultants for complex projects. Document all compliance measurements for building certification.
AS 1428.4.1 specifies tactile ground surface indicators (TGSIs) to warn people with vision impairment about hazards. Warning tactile indicators (raised truncated domes) must be installed at top of ramps, stairs, and platform edges to alert users of level changes. Directional tactile indicators (raised parallel bars) guide people along designated paths at complex intersections or large open spaces.
Warning TGSIs must be minimum 300mm depth, installed in contrasting color from surrounding surfaces (minimum 30% luminance contrast). The indicators must begin 300-400mm from the hazard edge for ramps and stairs. Materials must be durable, slip-resistant when wet, and able to be detected by long canes and underfoot. Installation quality is critical—poorly installed TGSIs create tripping hazards rather than providing safety.
AS 1428 applies to common areas of residential buildings including entries, corridors, lift lobbies, and shared facilities. Class 2 and 3 buildings (apartments, hotels) must provide accessible paths from parking and public streets to building entries and common facilities. Adaptable housing provisions require specific rooms and spaces be designed to allow future modification for accessibility, including reinforcement for grab rail installation and wider doorways.
Class 5, 6, 9, and 10 buildings (offices, shops, public buildings, carparks) require comprehensive AS 1428 compliance throughout public areas. This includes accessible entries, circulation paths, toilets, amenities, and workspaces. The Disability Standards for Accessible Public Transport extend accessibility requirements to transport facilities. For buildings with air conditioning systems, ensure accessible routes to mechanical equipment for maintenance using properly designed access pads.
Class 9b buildings (schools, universities) must ensure students with disabilities can access all educational spaces, libraries, laboratories, sports facilities, and amenities. AS 1428 compliance includes classroom access, appropriate desk heights, laboratory bench access, accessible performance spaces, and sports facility modifications. Outdoor learning areas, playgrounds, and sports courts must also be accessible.
AS 1428 is the Australian Standard that specifies design requirements for access and mobility for people with disabilities. It's important because compliance is legally required under the Disability Discrimination Act 1992 and Building Code of Australia. AS 1428 ensures buildings and facilities are accessible to everyone, including people using wheelchairs, mobility aids, or who have sensory impairments. Non-compliance can result in legal action, building certification refusal, and discrimination complaints in 2026.
AS 1428.1 specifies maximum ramp gradient of 1:14 (7.1% slope) for standard accessible ramps. This means for every 1mm of vertical rise, the ramp must be at least 14mm horizontal length. Steeper ramps between 1:8 and 1:14 gradient are permitted only with additional requirements including maximum rise limits, mandatory rest platforms, and specific handrail configurations. Fire-isolated exit ramps may be maximum 1:8 gradient under specific circumstances.
AS 1428.1 requires minimum 850mm clear opening width for general accessible doorways when the door is open to 90 degrees. Main entrances must provide minimum 1000mm clear width. The measurement is the actual clear opening (not door leaf width), measured between the door stop and door face when fully open. Door hardware must be 900-1100mm above floor level and operable with one hand without tight grasping, twisting, or pinching.
AS 1428.1 requires minimum 1000mm clear width for single-direction corridors where wheelchairs don't need to pass each other. Where wheelchair passing is required, minimum 1200mm width is needed. Major circulation routes in busy buildings should provide 1800mm minimum. The corridor must maintain consistent width throughout with no protrusions (fire extinguishers, displays, furniture) reducing the clear width below these minimums.
AS 1428.1 requires minimum 1540mm diameter clear space for wheelchair turning maneuvers. This circular space must be completely clear with no obstructions, allowing wheelchair users to perform 180-degree turns. Turning circles are required at dead-end corridors, accessible toilet entries, corridor intersections, and near building entries. The 1540mm dimension accommodates wheelchairs performing pivot turns without needing to reverse.
AS 2890.6 requires minimum 2.7% of total parking spaces (up to 100 spaces) be accessible parking. For facilities with 1-100 spaces, multiply total spaces by 0.027 and round up. For 101-200 spaces, provide 3 bays plus 2% of spaces exceeding 100. Larger facilities have reducing percentages. Accessible bays must be 3200mm wide × 5400mm long, with 1% of total spaces designated as van-accessible (3800mm wide). Bays must be on the shortest route to accessible building entry.
AS 1428.1 requires handrails on ramps and stairs to be 865-1000mm above finished surface, with 900mm being the preferred height. Handrails must be 30-50mm diameter (circular profile), with minimum 50mm clearance from walls. Handrails must extend minimum 300mm horizontally beyond the top and bottom of ramps and stairs. Both sides of ramps and stairs must have handrails, and they must be securely fixed to support minimum 1.1kN horizontal force and 1.5kN vertical force.
Yes, AS 1428 compliance is mandatory for all new buildings in Australia under the Building Code of Australia (BCA) and Disability Discrimination Act. Compliance requirements vary by building classification: Class 2-9 buildings require accessible paths, facilities, and amenities in public and common areas. Existing buildings undergoing major renovations must upgrade accessibility to current standards where technically feasible. Private dwellings (Class 1 buildings) must meet adaptable housing provisions where required by local planning schemes.
Official AS 1428 standards documentation and updates for disability access compliance in 2026.
View Standards →Australian Building Codes Board guides on accessibility compliance and Building Code requirements.
Visit ABCB →Information on Disability Discrimination Act requirements and accessibility obligations.
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