Builders and Suppliers of Wide Span Curved Roofs

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Technology

Spantech’s Unique Profiles

Spantech has developed and tested a selection of unique rollformed metal profiles:

  • Spantech Woomera 300
  • Spantech Pinkenba 370
  • Spantech Formwork 300
  • Spantech Longreach 650
  • Spantech Longreach 800

These patented profiles are self locking, standing seam metal profiles. They achieve the longest straight spans in their class to reduce the total amount of structural steel in your project.

All profiles are manufactured on site in continuous lengths with Spantech’s mobile rollforming machines.

Spantech profiles are a single skin, non-insulated profiles so they will not introduce a fire risk.  All out profiles can support conventional insulation and ceiling or wall lining systems.

Spantech Woomera 300 and Spantech Pinkenba 370

Key features

  • The system is simple and strong, yet elegant and graceful
  • The Spantech System is based on site-rolled metal building panels of various sizes and thickness
  • Panels are capable of use either flat or as self-supporting curved arches
  • Profiles clip together without fasteners using a patented connection. The connection is strong, water tight and maintenance free.
  • Maximum spans:
    • Woomera 300 – 30 metres
    • Pinkenba 370 – 40 metres

Panels interlock to form a continuous structural membrane with no screws and minimal bolts. All attendant works – skylights, ventilators, lights, insulation, ducts, ceilings and the like – can be incorporated easily and economically.

Mobile Rollforming Machine

The Spantech Rollforming Machine is the heart of the Spantech Construction System.

The rollforming machines are mobile so they can manufacture the Spantech panels on site. The fully self contained machines are housed in modified shipping containers so they can be transported by road, sea or air. This makes the Spantech Construction System ideal for construction projects in remote locations.

Spantech has a fleet of seven mobile rollforming machines – five Woomera 300 machines and two larger Pinkenba 370 machines.

On-Site Manufacturing

On-site manufacturing allows Spantech to roll panels in continuous lengths.

Straight panels are formed in the first manufacturing stage. Straight panels are used for end walls, flat roofing and composite formwork. The straight panel is fed into the curving section of the machine to form the distinctive Spantech curved panel.

The Pinkenba 370 curved profile can span up to 40 metres wide, so each curved panel may be as long as 46m. The on site manufacturing process therefore requires a relatively flat, large unobstructed area. A car park or sports field that has direct crane access to the building site is ideal. Spantech will help assess a site to ensure that there is a suitable manufacturing space available.

The rollform machine can manufacture straight and curved panels simultaneously. The process is fast. It minimises waste and reduces labour and handling costs.

Erection Process

Panels are prepared on the ground in lifts of either 4 or 5 panels high. Each panel is joined with Spantech’s patented rollformed edge connection, a system that requires no bolts, screws or additional bending. An engaging tool is run around the joint to simply clip the panels together.

Skylights, vents and any other penetrations are cut on the ground to minimise the need to work at height.

Panels are lifted with either an overhead spreader bar or an under-slung spreader bar depending on the layout of the site and type of crane used.

Panels are bolted to cleats pre-welded to the edge beam. Once positioned the lift is engaged to the previous panels. The engaging tool is simply pulled over the roof with a rope. Once engaged, the edge-beam bolts are tightened.

Skylights and vents are installed when the roof is completed.

The result is a continuous metal membrane that forms a self supporting curved roof that can be used for a wide variety of applications.

Design Assistance

Spantech profiles are unusual and it may take you some time to get to know how to get the best out of these innovative profiles. So Spantech offers comprehensive design assistance to Architects and Engineers. Contact us for details.

Formwork 300

Spantech Formwork 300 is the Woomera 300 profile manufactured from a range of high quality zinc coated coil steel.

The profile is used as composite formwork for suspended reinforced concrete slabs with a minimum slab thickness of 145mm.  The most common slab thickness is 160mm to accommodate standard mesh reinforcing.

The Spantech profile acts compositely with the reinforced concrete to reduce the overall amount of reinforcing required in the design.

The Formwork 300 profile can manufactured as a straight or curved profile.

Formwork 300 – Straight

The straight profile is used to construct typical suspended slabs. In this form the profile will span approximately 3.75m, subject to engineering requirements, significantly reducing or eliminating the need for temporary formwork supports.

Formwork 300 – Curved

The curved profile is used to form reinforced concrete arched structures up to 23m wide (Note: requires some temporary propping).  This application is typically used for earth covered buildings. Refer to the Sydney Zoo project or Defence Applications.

Design Assistance

Spantech profiles are unusual and it may take you some time to get to know how to get the best out of these innovative profiles. So Spantech offers comprehensive design assistance to Architects and Engineers. Contact us for details.

Spantech Longreach

The Spantech Longreach profile was launched in 2018. One mobile rollform machine manufactures these two profiles.

The Longreach 800 is the profile most commonly used as it provides excellent spans from 12 to 18m, wide cantilevered eaves in most wind terrain areas and excellent value with a cover width of 800mm.

The Longreach 650 is recommended where longer spans are required or higher wind loads apply. The Longreach 650 may also be specified where aluminium is required.

The cover width of the profiles can be stretched by approximately 100mm or compressed by approximately 75mm to achieve the ideal cover width for the project. Increasing the cover width may reduce the span capacity of the profile.

Features and Benefits

Design

  • The Spantech Longreach can span between 12 and 20 metres (subject to building location and Engineering design approval)
  • It can provide cantilever eave from 3 to 5 metres
  • It can be rollformed from pre-painted coil steel or aluminium

Cost

  • The Spantech Longreach is very competitively priced and fast to construct
  • The incredible spanning capabilities of the W Series can significantly reduce the total amount of structural steel and concrete required for a project
  • The Spantech rollform machine can be transported to site by a standard semi-trailer without an additional road escort, providing cost, time and scheduling advantages
  • Our brand new rollforming machine is safe, operationally efficient and extremely reliable

Buildability

  • The Spantech Longreach profile has a fully interlocking male and female edge connection which eliminates the need for Tek screws at 500mm centres. This saves construction time and reduces the risk of leaks and potential corrosion areas
  • Spantech Longreach profiles are lifted with secure clamps, not slings. This positive connection is stronger and safer than conventional sling techniques. It also reduces stress and twist on the profile during construction, minimising the risk of damage to the surface and prolonging the life of the material

Availability

  • Spantech coil steel suppliers hold stock of double sided “Off-White” so we can mobilise faster
  • Our rollforming machine and crew are readily available
  • Spantech will travel all over Australia

Functional Performance

  • The curved bends in the Spantech Longreach profile eliminate any flat sections in the cross-section of the profile. Large flat sections near the top of similar deep profiles can cause spouts of water to overshoot gutters and adversely effect building users
  • The curves in Spantech Longreach profile are similar to the curves in standard corrugated roofing to ensure the profile architecturally compliments a large range of standard roofing accessories
  • Spantech’s coil steel is always painted on both sides with the full three layer paint system, not just a primer on the underside of the sheeting. This means exposed underside areas such as large overhangs are the same “Off White” as the rest of the roof, not just a “Shadow Grey” primer. With a full paint system on both sides the panel is better protected, especially in areas where rain cannot continually wash the surface

Engineering Risk

We help minimise your design and engineering risk.

  • The Spantech Longreach has been rigorously tested to a large number of different tests
  • Spantech’s Consulting Engineers who designed and supervised the testing program will also design and certify the Spantech Longreach roof design
  • Our coil steel is warranted by one of the world’s largest and most advanced steel manufacturers who manufacture to both Australian and the higher European Standards. This Korean based mill is represented and supported in Australia by a locally owned and operated Victorian based steel supplier with over 30 years’ experience in the steel industry. Both operate independently certified quality control systems backed by Australian product warranties

Experience

  • The Spantech Longreach profile is being offered by the company that invented the profile, designed the rollforming machine and manufactures the profile.
  • Spantech is a Registered Builder with 38 years experience designing and constructing buildings with our unique range of site-rollformed roofing products
  • Spantech has completed numerous Spantech Longreach projects:
    • Lord Howe Island Airport Terminal
    • Three large buildings at St Joseph’s Catholic College, Coomera, Gold Coast. Principal Contractor, Hutchinson Builders
    • Longreach City Council’s Emu Street Undercover Carpark – over 6,000m2 of roofing. Principal Contractor, Spantech
    • Beenleigh Aquatic Centre – an unusual shaped roof achieved using the tapered Longreach 650 profile, plus Longreach 800 as cladding for sections of the external walls. Principal Contractor, Alder

For more details see Spantech’s Technical Data or Contact Spantech.

Design Assistance

Spantech Longreach profiles are new and unusual, and it may take you some time to get to know how to get the best out of these innovative profiles. So Spantech offers comprehensive design assistance to Architects and Engineers. Contact us for details.