Steel Frames
Steel framing is well matched to NDIS and accessible housing because it is easy to reinforce for ceiling hoists, grab rails and high impact linings, it supports wide openings and step free layouts, and it is non combustible and termite proof. Those qualities line up directly with the four design categories of the NDIS Specialist Disability Accommodation Design Standard. This guide explains the SDA framework, why steel suits each category, the standards your build must meet, and the accessible housing project we have delivered in Melbourne.
Specialist Disability Accommodation, or SDA, is housing designed for NDIS participants with extreme functional impairment or very high support needs. Since 1 July 2021, all new and refurbished SDA has had to meet the NDIS SDA Design Standard, which replaced the earlier Livable Housing Design Guidelines for SDA. The Standard is organised into 25 design elements, covering everything from pedestrian entry, doors and windows to kitchens, bathrooms, ceiling hoists, emergency power and fire safe design, with each element linked to one or more design categories.
SDA can take many built forms, including apartments, villas, duplexes, townhouses, detached houses and group homes, so it overlaps with much of the residential and medium density work already happening across Melbourne. Every SDA dwelling must be certified by an Accredited SDA Assessor at both the design stage and the as built stage, which puts a premium on getting the structure right the first time. The NDIA has commissioned an independent review of the Standard during 2026, though the four design categories themselves are expected to remain stable. Alongside SDA, general accessible housing is increasingly shaped by the Livable Housing provisions now adopted into the National Construction Code.
High Physical Support dwellings need engineered structural support for ceiling hoists, tailored to the resident’s mobility needs. Steel framing is straightforward to engineer for these concentrated point loads and to detail with the reinforcement needed exactly where a hoist track runs, which makes it a natural fit for the most demanding SDA category.
Accessible dwellings need walls that can take grab rails, reinforced fixings and heavier fit out than a standard home. Steel framing is readily detailed with additional noggings and reinforcement at exactly the right points during manufacture and installation, so accessibility fittings can be fixed securely wherever the design and the AS 1428 access and mobility standards call for them. Engineered steel wall framing makes these layouts practical to build.
The Robust category is designed for participants whose behaviours may cause harm to themselves, others or property, and it calls for high impact wall linings, secure doors and windows, laminated glass and durable materials. Steel framing provides a strong, consistent backing structure that is readily detailed to carry high impact linings and resilient fixings, keeping wall lines true under heavy use.
Fully Accessible dwellings rely on wider doorways, generous circulation and open, step free layouts for wheelchair users. Steel’s high strength to weight ratio allows wider openings and larger clear spans with fewer supports, which gives designers the freedom to meet accessible design requirements without awkward structural compromises.
Fire safe design is one of the 25 SDA design elements, and it matters most in dwellings whose residents may have limited mobility. Steel is non combustible, so the frame does not ignite, fuel or spread fire, which supports the fire provisions of the National Construction Code and the fire safe intent of the SDA Standard.
Disability housing must perform reliably over a long life with minimal disruption to residents. Steel does not rot, warp or attract termites, which removes a whole category of maintenance and chemical treatment, and its dimensional stability means fewer defects and callbacks after a resident moves in. Steel also makes future proofing easier: a ceiling can be engineered to take a hoist later, or a wall reinforced for fittings to come, avoiding a costly rebuild as a resident’s needs change.
Knowing which category your dwelling targets shapes the structure from the outset. Many investors build to cover more than one category to widen the pool of eligible participants. The table below summarises the four categories and what each one asks of the build.
SDA category | Who it is for | Key design focus |
Improved Liveability | People with sensory, cognitive or intellectual impairment | Tactile and clear wayfinding, lever fittings, intuitive single storey layouts |
Fully Accessible | People with significant physical impairment, including wheelchair users | Step free access, wider doorways, accessible kitchens and bathrooms |
High Physical Support | People with the most significant physical and medical support needs | All Fully Accessible features plus structural support for ceiling hoists, height adjustable appliances and emergency power |
Robust | People with complex behaviours that may cause harm | High impact linings, secure doors and windows, laminated glass, durable materials and soundproofing |
Source: NDIS SDA Design Standard and published SDA design guidance. Confirm category requirements with an Accredited SDA Assessor.
Standard or framework | What it covers |
NDIS SDA Design Standard | The four design categories and 25 design elements for Specialist Disability Accommodation |
NCC Livable Housing provisions | Accessibility provisions for new homes adopted into the National Construction Code |
AS 1428 series | Design for access and mobility, the basis for accessible doorways, circulation and fittings |
AS/NZS 4600:2018 and NASH Standard | Cold formed steel design and recognised residential steel framing practice |
AS 1397 | The coated steel sheet standard governing the base material, including TRUECORE steel |
Source: NDIS SDA Design Standard, National Construction Code and the relevant Australian Standards.
We build using Australian made TRUECORE steel, manufactured to AS 1397, with sections specified by the engineer for the loads and the reinforcement each dwelling requires.
CMC Steel Solutions supplied and installed the steel framing for an NDIS housing project in Boronia, in Melbourne’s east. The work covered the structural and light gauge steel framework, built with Australian TRUECORE steel. You can view the project below and explore our wider portfolio on the projects page.
Project | Scope |
Supply and install of structural and light gauge steel framing for an NDIS housing development, built with Australian TRUECORE steel |
Source: CMC Steel Solutions project record and project page, linked above.
This project sits alongside our broader residential steel frame experience across Melbourne and Victoria, giving our team the background to handle the accessibility, compliance and durability demands of supported housing.
SDA dwellings carry higher fit out and structural demands than standard homes, so the framing decision affects both build cost and long term flexibility. Steel’s ease of reinforcement supports ceiling hoists and high impact linings without bespoke workarounds, and its durability lowers maintenance and disruption to residents over the life of the home. Designing the structure to cover more than one SDA category, or to be upgraded later, can widen the pool of eligible participants and protect the investment. The most reliable guide to cost is a project quote that accounts for the target category, layout and reinforcement required.
Yes. Steel framing is easy to reinforce for ceiling hoists, grab rails and high impact linings, supports wider openings and step free layouts, and provides a durable, non combustible structure. These qualities align well with the four design categories of the NDIS SDA Design Standard.
Improved Liveability for sensory, cognitive or intellectual impairment; Fully Accessible for significant physical impairment including wheelchair users; High Physical Support for the most significant physical and medical needs; and Robust for complex behaviours, requiring durable, high impact design.
Yes. Steel framing is engineered for the concentrated point loads of a ceiling hoist and detailed with reinforcement exactly where the hoist track runs, which suits the structural support requirements of the High Physical Support category.
Yes. The Robust category calls for high impact wall linings, secure fittings and durable materials. Steel provides a strong, consistent backing structure that is readily detailed to carry high impact linings and resilient fixings under heavy use.
The NDIS SDA Design Standard has been mandatory for all new and refurbished Specialist Disability Accommodation since 1 July 2021, replacing the earlier Livable Housing Design Guidelines for SDA.
Generally yes. Steel does not rot, warp or attract termites, which removes ongoing chemical treatments and reduces defects and callbacks, helping minimise disruption to residents over the life of the home.
Yes. CMC Steel Solutions supplied and installed the steel framing for a completed NDIS housing project in Boronia, in Melbourne’s east, built with Australian TRUECORE steel.
If you are developing NDIS or accessible housing across Melbourne or Victoria, our team can frame it safely, accessibly and to last. We supply and install structural and light gauge steel framing built with Australian TRUECORE steel, engineered to AS/NZS 4600 and the NASH Standard and backed by completed accessible housing work.
Call us on 1300 285 566, email info@cmcsteelsolutions.com.au, or request a free quote to discuss your project.
Are you looking for steel framing solutions? We at CMC Steel Solutions offer wide range of products for construction projects.
Connect with our team at 1300 285 566 or email us your doubts on info@cmcsteelsolutions.com.au for better response.
