Spantech’s patented roofing profiles are used to build spectacular wide span curved roofs.
Spantech is well known for two spectacular self-supporting curved roofing profiles: the Woomera 300 and Pinkenba 370.
These unique curved profiles are supported at edge beams and free-span the width of the building. In most applications, the buildings do not require trusses or internal columns.
These profiles create amazing wide-open spaces. This design approach is ideal for all types of indoor sport, aquatic centres and large agricultural buildings.
Projects which use this striking design approach include ABB Grain Stores, NZ and the Goonellabah Sports and Aquatic Centre.
Curved roofing can also be achieved with the Spantech Longreach 650 and Longreach 800 profiles. The long-span straight profile is supported on or under curved structural steel beams.
With long spans between structural beams, this approach significantly reduces the amount of structural steel in the design. It also significantly reduces the number of columns and footings.
Projects like the Emu Street Car Park, Qld and Charlton Christian College, NSW successfully use this product and design approach.
A wide span curved roof may be incorporated with almost any conventional type of structural support system:
Curved panels are generally fixed to structural steel edge beams located at the top of the side walls or columns. Walls or columns are designed to carry the additional load of the free-spanning curved roof by introducing structural steel buttresses, buttress walls, increased footing size, or a combination of these engineered solutions.
When curved beams are introduced to support Longreach profiles, the beams create a portal frame minimising the size of columns and footings.
Ceilings can be curved to follow the line of the roof, or suspended. Curved ceilings can be created with plaster board or Custom Orb.
Perforated Custom Orb is regularly used in commercial buildings where thermal and acoustic insulation is required.Custom Orb ceilings can be made with steel or aluminium base metal to suit the environment.
Lighting, air-conditioning and most other light-weight architectural fixtures and services can be hung directly from the roof without any additional support. Where live loads or point loading is required, additional structural steel beams are used to spread the load over a larger area.
Some heavy loads may require additional structural steel to distribute loads back to walls or columns. Services such as fire sprinkler systems and electrical conduits can be fitted to the roof. Where no ceiling is fitted, suspend electrical conduits with Spantech’s integrated MP (multipurpose) clip.
If they need to be concealed, install conduits on the outside of the roof, then cover and waterproof with a curved barge flashing to match the curved flashings at the ends of the roof.
View Our Pinkenba 370 Roof Demo
Use the table below to help you find the right Spantech profile for your next project.
| Application | Woomera 300 | Pinkenba 370 | Longreach 800 | Longreach 650 |
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Wide span curved roof – self supporting |
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Straight profile on curved beams |
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Straight or tapered profile on undulating beams |
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Multi-span arched roofs |
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Earth covered curved roof |
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Spantech design and construct large projects featuring multi-span arched roofs to cost effectively cover large spaces. These buildings are typically used for:
Architectural Possibilities
Multi-arched roofs also provide distinctive architectural features and creative design opportunities.
In this concept for a major Sports and Aquatic Centre, the architect has created a series of voluminous light filled spaces using the Spantech Pinkenba 370 curved profile.
Each sloped roof section acts as a free-spanning curved roof. The section of the roof is defined by a light-weight truss which defines the break in the roofline and supports the translucent curved skylights. Generous overlapping cantilevered eaves control light and heat within the facility.
Internal gutters are also cleverly avoided in this bold concept. The central element of the concept design features a three level administration block.
The expansive space created by the arched roof allows for a loft level. Also, by deleting a section of the curved roof in this area, light is allowed to flood into all three levels of the central hub of the building. Contact Spantech to explore more options with multi-arched roofs.
Design efficiency is key to the successful application of the Spantech Construction System. Spantech works closely with Architect and Engineer to ensure the benefits of the Spantech Construction System are maximised in each project.
This careful collaborative approach to design provides savings in construction time and costs, minimises labour and material costs and reduces the ongoing operating costs for the life of the facility.
Spantech offers two profiles specifically designed to achieve multi-span curved roofs. Use the table below to help you find the right Spantech profile for your next multi span curved roof project.
| Application | Woomera 300 | Pinkenba 370 |
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Multi-span curved roofs |
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Multi-span earth covered curved roof |
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Other Wide Span Curved Roofing Applications
Spantech profiles were originally developed for roofing. But the strength and versatility of these unique profiles makes them cost effective and suitable for a wide range of applications.
Spantech builds specialised commercial projects using wide-span roll formed metal profiles developed by Spantech.
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