Apex / Gable Roof
The classic triangular roof shape with two sloping sides meeting at the highest point (the apex). It gives good water run-off and extra internal height at the centre, which is handy for hoists, mezzanines or tall vehicles. You’ll see this on many of our residential sheds.

Apex Plate (Apex Bracket)
A steel plate or bracket at the peak of a gable roof that connects the two rafters together. This ties the roof frame at the highest point and helps the shed resist wind forces.

American Barn
A barn-style shed with a higher middle section and lower sides, giving a triple-gable look. It creates a wide, flexible space inside that can be used for vehicles, stables, workshops or storage. For examples, see our custom COLORBOND® barns.

Awning
A roofed extension attached to the main shed, usually open-sided and supported on posts. Awnings are often used for extra covered parking, shaded work areas, or to keep boats and caravans out of the weather. They’re a common style on our carports and garaports.

Base Plate
A flat steel plate fixed to the bottom of a column so it can be bolted down to the concrete slab. Base plates help spread loads and provide a solid connection between the shed frame and the slab.

Battens
Light-gauge steel sections used to support roof or wall sheeting on smaller sheds. They are screwed to the main frame and give the roof and walls something solid to fix to.

Birdproof / Vermin Flashing
A shaped metal flashing installed at the base of the walls to seal the gap between the wall sheeting and the slab. It helps keep out mice, snakes, dust and weather. This works best with slab-first construction and is one of the upgrades we often recommend. Learn more on our Vermin Flashing page.

Bracing (Cross-Bracing)
Diagonal steel straps or rods fixed in the walls or roof to stop the shed from racking or swaying in strong winds. Bracing is critical for shed strength and is a big part of the engineering.

Clear Span
A shed design where the roof spans from one side wall to the other with no internal columns. This gives you open floor space for vehicles, machinery, storage or entertaining without posts in the way.

COLORBOND^® Steel
Pre-painted, corrosion-resistant steel made by BlueScope. It comes in a wide range of colours and is used for both walls and roofs. It’s designed for harsh Australian conditions and is the standard material used on our sheds.

Concrete Slab (Slab-First Construction)
The reinforced concrete floor your shed sits on. We pour the slab first, then build the shed on top, like you would with a house. This approach supports better engineering, cleaner finishes and long-term durability. You can see examples of our slab work on the Complete Projects page.

Corrugated Steel
The familiar “wavy” profile steel sheeting used for many shed roofs and walls. The ripples add strength and help channel water off the roof.

Council Approvals
The process of getting both planning and building approval from your local council. It covers things like siting, heights, easements and wind loads, and confirms your shed complies with the relevant codes and standards. As a licensed builder, we manage this as part of our turnkey service, so you don’t have to act as an owner-builder.

Cyclonic / Non-Cyclonic Wind Regions
Australia is divided into wind regions that determine how strong your shed must be. Non-cyclonic regions (N ratings) cover most of South Australia, while cyclonic regions (C and D) apply mainly in northern Australia. The wind rating affects your frame size, bracing and fixings.

Door Header
A horizontal structural member above an opening such as a roller door or personal access door.
It supports the wall and cladding above the door and keeps the opening square.

Dynabolt
A brand of expansion anchor used to fix brackets and base plates to an existing concrete slab (ShedEx Fleurieu does not use this method).  The bolt expands inside the drilled hole as you tighten it, gripping the concrete securely

Eave Height
The height from the finished ground level to the underside of the roof at the eaves (the gutter line). This is essentially the wall height and determines how tall vehicles and equipment can be at the edges of the shed.

Eave Overhang
The part of the roof that projects beyond the walls of the shed. Eaves help protect walls from weather, improve airflow and can help your shed match the style of your home. Learn more about eaves on our Eave Overhangs page.

Eave Purlin
The horizontal member at the junction of the roof and wall that ties the tops of the wall frames together. It provides a fixing point for both roof and wall sheets where they meet.

Fly Bracing
Short diagonal braces that connect roof purlins or wall girts back to the main frame to stop them from twisting. These small pieces play an important role in keeping the roof and walls straight and strong.

Gable End / Gable End Wall
The end wall of a gable-roof shed that has the triangular shape at the top. This wall supports the roof at the apex and often houses roller doors, windows or vents.

Garaport
A combination of a fully enclosed garage with an attached carport-style extension. It gives you a secure lock-up area plus extra roof cover for vehicles, boats or outdoor work. You can explore options on our Garaport Sheds page.

Girt (Wall Girt)
A horizontal steel member that runs along the inside of the walls. Wall girts support the wall sheeting and stiffen the frame.

Haunch / Knee Joint
The point where the column and rafter meet in a portal frame. This is usually reinforced with a knee plate or bracket and is a key structural connection in the shed frame.

Kit Shed (Shed Kit)
A shed supplied as a bundle of pre-engineered components – frame, sheeting, brackets and fasteners – ready for assembly on site. Many suppliers stop at selling the kit, but at ShedEx Fleurieu we’re licensed builders and can manage the entire project from design to final construction so you don’t end up juggling trades on your own.

Mullion
A vertical member placed in a gable end wall between the corner columns. It supports wall girts and cladding on wider end walls and helps keep the end wall straight and strong.

PA Door (Personal Access Door)
A standard hinged door for people to enter and exit the shed without opening a roller door. Ours are steel-framed and secure, with quality locksets. You can read more on our Personal Access Doors page.

Panel Lift Door (Sectional Door)
A garage-style door made of multiple hinged panels that lift up and back along the ceiling. Panel lift doors give a modern look and are ideal when you want maximum opening height with a clean finish. Learn more on our Panel Lift Doors page.

Portal Columns
The main vertical steel members that form part of the shed’s portal frame. Portal columns run up from the slab and connect to the rafters at the knee joint, creating the rigid “leg” of each frame. They carry roof loads, wind loads and help the shed stand up without internal posts.

Portal Frame
The primary structural system used in most steel sheds – a series of rigid frames made from columns and rafters, connected at the knee and apex with bolts and brackets. Portal frames give the shed its shape and strength and allow for wide clear spans.

Purlins (Roof Purlins)
Horizontal steel members that span between rafters and support the roof sheeting. Roof sheets are screwed directly to the purlins.

RHS (Rectangular Hollow Section)
A rectangular hollow steel tube used for posts, beams and other structural members where extra strength is needed. It has a flat face on each side and is common in heavy-duty framing.

Roller Door
A door made of horizontal slats that roll up into a coil above the opening. Roller doors save space, offer good security and are ideal for sheds storing vehicles and machinery. We install high-quality COLORBOND® roller doors – see our Roller Doors page and our article Why We Recommend Roller Doors to learn why we prefer them over sliding doors.

SHS (Square Hollow Section)
A square hollow steel tube used for posts and structural elements where strength is required in both directions. It looks like RHS but with equal sides.

Skillion Roof
A single-slope roof that falls in one direction only. Skillion sheds give a modern look and are often used for boundary sheds or when matching a contemporary home. You can explore designs on our Skillion Sheds page.

Skylight
A translucent or clear panel in the roof that lets natural light into the shed. Usually made from polycarbonate or fibreglass and shaped to match the roof profile. See the Skylights section under Extras.

Stormwater Connection
The piping and drainage that takes water from your gutter downpipes to either an underground system or rainwater tanks. Good stormwater management helps protect your shed and slab from moisture issues.

Tek Screws
Self-drilling metal screws with a drill-bit tip that can bore through steel without pre-drilling. They are used to fix roof and wall sheeting to purlins and girts and to join light steel members together.

Wind Rating / Wind Region
The classification of your site’s wind conditions under Australian standards. It determines how strong your shed’s structure and fixings need to be. Higher wind ratings require heavier frames, more bracing and stronger connections. We design every project to the correct wind rating as part of our engineered solution.