Gable Steel Rafter Construction

The original Gable Steel Rafter clearspan building range by Alpine has been tried and proven for many years all over New Zealand including in extreme snow and wind zones.

Alpine Steel Rafter kitset sheds are constructed using the highest quality components, and have a structural sign-off for greater than 50 years (the longest available in the industry).



Our Gable Steel Rafter range includes standard spans of 9.0m, 12.0m, 15.0m, 18.0m and 21.0m, with the bay widths designed to your requirements. If you require 18.0m clearspan or greater, you can also check out our TidySpan® range here.

A concrete floor is optional for all of Alpine's construction methods, meaning Alpine farm buildings are perfect for hay barns, tractor and farm storage sheds, and other structures where a floor is not required.

Alpine gable clearspan structures are designed & engineered to your proposed location, with specific wind & snow loads.

Contact us now for a no-obligation quote, or ask us for expert advice on your project.

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The Alpine difference:

  • Quality Components: All timber is H3.2 tanalised or greater, and poles are H5 treated for 50 years protection.
  • Pre-dried Timber: The timber roof purlins are strip-stacked to dry before packing into a kitset, meaning it is a lot lighter, easier and safer to build.
  • Timber Framing: Timber framing gives you a building that breathes, is more temperature controlled, and is quiet to work in.
  • 0.4 Gauge cladding: Heavier & stronger roof and wall cladding than many shed companies offer.
  • Placed & welded purling hangers: Purlins simply slot into Alpine designed J-hangers that have been pre-welded onto your Steel Rafters. These have been proven to save hours of install time.
  • Bolted connections: All rafter and purlin connections are bolted or welded during fabrication. This gives you connections that are much stronger than using tek screws and pressed steel brackets.
  • Nested purlins and girts: All the purlins and girts (steel or timber options) are nested between the rafters and columns. This gives you the maximum interior width and height inside the shed.
  • No knee or apex braces: The Alpine design has no need for large obtrusive apex or knee braces inside the shed. This means you get maximum head room and side room inside the shed.
  • Hot dip galvanising: HDG is a process that coats the entire surface area of the steel in molten zinc after the steel is fabricated. This results in a protection coating that is 2.5 times thicker than cold rolled steel that is coated prior to roll forming.
  • Box section rafter design: The impressive clearspan rafters are made out of a rectangular hollow section (RHS). As the RHS is typically only 300mm deep, you get maximum clearance and space inside your shed.
  • Birdproof rafters: A unique feature of the Alpine building design is the birdproof rafters. These rafters are designed especially to reduce places for birds to perch and nest in the roof space.


Read more in our brochure .. or watch videos on the Alpine features & benefits here.


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