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What is a commercial cover or shelter?
A commercial cover or shelter is a steel-framed roof structure with open or partially walled sides, designed to put weather protection over a defined outdoor area without enclosing it as a building. Most are clad in Colorbond® on the roof, framed in 100% Australian-made BlueScope steel, and engineered to AS/NZS 1170.2 wind loading for the actual region (Standards Australia, AS/NZS 1170.2:2021 Structural design actions, Part 2: Wind actions). Common applications cover walkways between buildings, car park rows, loading bays, equipment compounds, bin enclosures and outdoor work zones.
Under the National Construction Code, free-standing covers and shelters are usually classified as Class 10b, the non-habitable structure class that covers fences, masts, free-standing walls and "structures of a like nature" (Australian Building Codes Board, NCC Building classifications). That classification still triggers a structural design path and engineering certification, just not the habitable-building requirements that drive workshops and warehouses.
ShedDesigner's covers and shelters templates start at single-bay walkway covers and step up to multi-row car park shelters and large equipment covers. Pick the closest template, set your span, length, eave height and post pattern, then submit your design once for free comparable quotes from ShedSafe accredited dealers in your region.
Sizing the cover to the use
Covers fail when they are sized to the average day, not the wind day.
Walkway covers. A pedestrian walkway cover usually runs 2.4 to 3.0 metres wide between posts and 2.4 to 2.7 metres of clear headroom, scaling up to 3.6 metres width on busy entrances. Cantilever versions remove one row of posts at higher steel cost. Walkway covers between buildings are also a common access path for trolleys, deliveries and disability access, which drives the clear-width minimum.
Car park shelters. A standard parking bay sized to AS/NZS 2890.1:2004 is 2.4 by 5.4 metres (Standards Australia, AS/NZS 2890.1:2004 Parking facilities, Part 1: Off-street car parking). A standard double-row shelter spans 11 metres clear with a centre row of posts between bays, or 16 to 18 metres for an island layout with cars parked back-to-back. Eave heights of 2.7 to 3.0 metres clear most passenger vehicles. Step to 3.6 to 4.0 metres if the shelter covers utes with roof racks, vans or service vehicles.
Equipment and bin covers. Sized around the gear, with the same eave-clearance discipline as a machinery shed: clear the tallest piece of equipment plus 300 mm of working margin. For waste-bin enclosures, plan the swing arc of the front-loader truck arm above the bin lid before locking the eave height.
For larger fully walled commercial buildings, see warehouse sheds, industrial sheds and factory sheds. For sport, school and equine cover variants, see the broader commercial designs category.
Steel cover vs fabric shade
Most buyers comparing options also look at fabric shade sails and tensile membrane structures. Both options have a place. The difference is that a steel-framed Colorbond® cover is rated to handle hail, rain run-off, prolonged UV exposure and the cyclone-region wind loads of Region C and D without re-tensioning, replacement of the membrane or the fabric-life cycle of 10 to 15 years. Steel covers also carry rainwater for tank harvesting, which fabric does not. For weather-exposed long-life infrastructure, the steel pathway usually wins on lifecycle cost; for short-term shade-only deployments, fabric is fast to install.
Before you get quotes
A cover stays bolted to your site for 30 years. The build needs to outlast the asset sitting under it.
100% Australian-made BlueScope steel. Across structural framing and Colorbond® cladding. BlueScope's COLORBOND® steel cladding for sheds and garages carries a warranty of up to 15 years against corrosion to perforation, with the exact period set by location and application (BlueScope, Garages & Sheds Warranty). Check your build on BlueScope's online warranty estimator.
ShedSafe accredited dealers, no exceptions. Every dealer on ShedDesigner is ShedSafe accredited under the Australian Steel Institute programme, which independently verifies dealer engineering against AS/NZS 1170.2 and the National Construction Code.
One design, multiple quotes. Your cover design goes out to dealers covering your region. Every quote prices the same shelter, in the same steel, to the same engineering, so the quotes you get back are directly comparable.
Browse the broader commercial designs category for related shelters and shed types.
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Frequently Asked Questions
What classification is a commercial cover under the NCC?
Free-standing covers and shelters are usually classified as Class 10b under the National Construction Code, the non-habitable structures class that covers fences, masts, free-standing walls and "structures of a like nature" (Australian Building Codes Board, *NCC Building classifications*). Class 10b structures still need structural engineering certified to AS/NZS 1170 series wind, dead and live loads. If the cover is attached to a Class 1 or Class 5 building, it usually inherits the parent class.
What size posts and footings does a cover need?
Engineering depends on span, eave height and the AS/NZS 1170.2 wind region for the site. As a guide, a 6-metre-span walkway in Region A runs 100 by 100 SHS posts on engineered concrete pad footings around 600 mm cubed. The same span in Region C (cyclonic northern coast) usually steps up to 125 by 125 SHS or heavier RHS, deeper footings and AS 3566 Class 4 fasteners. Engineering certification is part of the dealer quote, never something to value-engineer out.
How wide should a covered walkway be?
2.4 metres clear width is the practical minimum for two-way pedestrian flow and trolley access. 3.0 to 3.6 metres is the working benchmark for school, hospital, retail and disability-access primary routes. Cantilever versions on a single side row of posts give a clearer floor for cleaning and trolley turning, at higher steel cost than a two-post column.
What spans cover a double row of car park bays?
Most double-row car park shelters span 11 metres clear with a centre row of posts between bays, sized to AS/NZS 2890.1:2004 (2.4 by 5.4 metre bay minimum). Island double-row shelters span 16 to 18 metres for a back-to-back layout with no centre row. Eave heights of 2.7 to 3.0 metres clear passenger vehicles; step to 3.6 to 4.0 metres for utes, vans and service vehicles. Wider spans are routine but add steel cost.
Steel cover or fabric shade sail?
Steel-framed Colorbond® covers handle hail, rain run-off, prolonged UV and Region C and D wind loads without re-tensioning or membrane replacement. Fabric tensile membranes generally need replacement on a 10 to 15 year cycle and do not carry rain effectively for tank harvesting. For weather-exposed long-life infrastructure, steel usually wins on lifecycle cost. For short-term shade-only deployments in low wind regions, fabric installs faster.
Do I need council approval for a commercial cover?
Almost always. Class 10b commercial covers above small thresholds usually require either a Construction Certificate or a Development Application, depending on size, height, fire-separation distances and zoning. Set-back rules and floor-space ratios apply to industrial and commercial zones. Always confirm with your local council and certifier before pouring footings.
Can I add a cover to an existing building?
Yes. Awning, lean-to and connecting walkway covers are common attachments. The connection has to be engineered to transfer wind uplift back to the parent structure, and the cover normally inherits the parent building's NCC class. Talk to your dealer early so the connection is engineered, not retrofitted.
Does a commercial cover need rainwater drainage?
Yes. Covers over walkways, car parks and bin enclosures all need engineered gutters and downpipes sized to AS/NZS 3500.3 *Plumbing and drainage, Part 3: Stormwater drainage*. Your dealer designs this in, including the gutter profile, downpipe spacing and connection to the site stormwater system. For sites with a rainwater tank, the cover doubles as a catchment.
Other Commercial designs
Large Sheds
Clear-span steel buildings sized for serious commercial operations. NCC Class 7b or 8, engineered to AS 4100, 100% Australian-made BlueScope steel.
Self Storage Sheds
Repeating-bay storage units sized to operator economics, NCC Class 7b compliant, built from 100% Australian-made BlueScope steel.
Industrial Sheds
NCC Class 7 / 8 industrial sheds. Forklift clearance, fire compliance, BlueScope steel, fully customisable.
Factory Sheds
Factory shed designs for production and assembly operations. Engineered for heavy-duty use.