• Outstanding wind load resistance and water-carrying capacity
  • Suitable for roof pitches as low as 1 degree
  • Compatible Stramit Farlap® roof lap joint system gives a multiple sheet option for long length concealed fixed roofs
  • Full length clips to correctly locate ribs and compress insulation
  • Some system and span combinations certified to FM Global approval standard FM4471
  • Automatic bird proofing reduces need for extra components
  • Australian design award winner

Base Material Thickness (mm): 0.42, 0.48


Standard Steel

Standard Steel
COLORBOND® steel Bluegum®

Standard Steel
COLORBOND® steel Dover White™

Standard Steel
COLORBOND® steel Southerly®

Standard Steel

Standard Steel
COLORBOND® Deep Ocean®

Standard Steel
COLORBOND® Cottage Green®

Standard Steel
COLORBOND® Ironstone®

Standard Steel
COLORBOND® Monument®

Standard Steel
COLORBOND® Woodland Grey®

Standard Steel

Standard Steel
COLORBOND® Classic Cream™

Standard Steel

Standard Steel

Standard Steel

Standard Steel
COLORBOND® Pale Eucalypt®

Standard Steel
COLORBOND® Windspray®

Standard Steel

Standard Steel
COLORBOND® Shale Grey™

Standard Steel
COLORBOND® Evening Haze®

Standard Steel
COLORBOND® Paperbark®

Standard Steel
COLORBOND® Surfmist®

Ultra Steel
COLORBOND® Dune® Ultra

Ultra Steel
COLORBOND® Monument® Ultra

Ultra Steel
COLORBOND® Surfmist® Ultra

Ultra Steel
COLORBOND® Woodland Grey® Ultra

Ultra Steel
COLORBOND® Wallaby® Ultra

Ultra Steel
COLORBOND® Windspray® Ultra

Ultra Steel
COLORBOND® Shale Grey™ Ultra

Metallic Steel
COLORBOND® Galactic™

Metallic Steel

Metallic Steel

Metallic Steel

Metallic Steel

Matt Steel
COLORBOND® Basalt® Matt

Matt Steel
COLORBOND® Monument® Matt

Matt Steel
COLORBOND® Surfmist® Matt

Matt Steel

Matt Steel
COLORBOND® Shale Grey™ Matt

Matt Steel
COLORBOND® steel Bluegum®

Off White

Armour Grey



Slate Grey

Other Finishes

Certain colour options and finishes may be subject to availability and lead times may vary from site to site. Please contact your local Stramit office to confirm.

Where to Buy

Stramit account holders can buy Stramit Speed Deck Ultra® Concealed Fixed Decking from their local Stramit office. We do not sell direct to the public but our products are stocked by retail outlets across Australia.

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This product is available Australia-wide. If it’s not manufactured in your area, please contact your local Stramit office to discuss options or suitable alternatives. Lead times may vary depending on location.

News and Case Studies

Check out Stramit’s latest news, product releases and updates, and case studies featuring our quality Aussie-made steel products.

News chevron-small-right-white-rounded
Bapcor’s new warehouse takes shape

A new 50,000 square metre warehouse, using Stramit quality products, is taking shape at Melbourne Airport to distribute parts for Bapcor, Australasia's leading provider of automotive aftermarket parts, accessories, equipment and services.

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commercial structural warehousing and logistics
Stramit helps deliver Queensland’s first mega cruise ship terminal

Queensland will soon have its first mega cruise ship terminal, using Stramit quality products.

The new $177 million Brisbane International Cruise Terminal will have purpose-built facilities to accommodate some of the world’s largest cruise vessels, including mega ships such as the Royal Caribbean International's 293m-long Radiance of the Seas.

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corrosion resistance roofing and wall cladding commercial sport & leisure structural qld
General Information close-medium-white

Stramit Speed Deck Ultra® Concealed Fixed Decking gives excellent durability in almost all locations. With all of its fastenings protected beneath the decking, Stramit Speed Deck Ultra® Concealed Fixed Decking can be expected to outlast through-fixed roofing. However, it is important to choose the correct coating for each application environment. Durability recommendations do vary based on the application of the product in roofing or walling installations.

All building products need to be checked for compatibility with adjacent materials. These checks need to be for both direct contact between materials, and where water runs from one material to another.

The following guidelines generally avoid material incompatibility:

  • For zinc-aluminium alloy coated steel, colour coated steel and galvanised steel cladding avoid copper, lead, green or treated timber, stainless steel and mortar or concrete.
  • Galvanised steel sheets should not receive drainage from aluminium or any inert materials, such as plastics, glass, glazed tiles, colour coated and zinc-aluminium alloy.

Stramit's roofing and walling products should be handled with care at all times to preserve the product capabilities and quality of the finish.

Packs should always be kept dry and stored above ground level while on site. If the products become wet, they should be separated, wiped and placed in the open to promote drying.

The unique Stramit Speed Deck Ultra® Concealed Fixed Decking full width clip compresses blanket during installation making fixing easy. Blanket up to 100mm in thickness can be readily used. High thermal efficiency can be achieved by using Styrofoam blocks laid between the blanket and the fixing clips. Contact us for further information.

Stramit Speed Deck Ultra® Concealed Fixed Decking is supplied cut to length. When designing or transporting long products ensure that the length is within the limit of the local Transport Authority regulations.

The manufacturing tolerance on the length of product supplied is +0, -15mm

Stramit products conform to the following Australian standards that are called up in the NCC.

Steel material           

  • All metallic coated steel complies with AS 1397                       
  • Painted steel product conforms with AS 2728

Roofing / Walling products 

  • Roofing/walling profiles conform with AS 1562.1, and AS 4040 parts 0, 1, 2 and 3.
  • Corrugated roofing conforms with AS 1445                       
  • Wind Load data conforms to AS 1170 part 2, and/or AS 4055                       
  • Fasteners conform with AS 3566                       
  • Installation details are in accordance with the Standards Australia Handbook HB39

Stramit's roofing and walling products are protected in Australia by registered designs.

All Stramit roofing and wall cladding products conform with, or are equivalent to, AS1562.1.

Stramit has in-house, purpose built testing equipment used to design, develop and improve products for the Australian market. Many of our products are tested or witnessed by independent organisations. These include:

  • University of Technology, Sydney
  • Cyclone Testing Station (James Cook University)
  • The University of Sydney, and 
  • CSIRO.

The ongoing research and development activity ensure we remain at the forefront of innovation, design and consumer information.

Technical Information close-medium-white

The roofing/walling shall be 0.42 (or 0.48) mm BMT Stramit Speed Deck Ultra® Concealed Fixed Decking in continuous lengths with trapezoidal ribs 43mm high, spaced at 233mm centres. Sheeting material shall be protected steel sheet to Australian Standard AS1397, with a minimum yield stress of 550MPa (Grade G550) and an AM100/AZ150 coating with an oven-baked paint film of selected colour, or a plain AM125/AZ150 coating.

The sheeting shall be fixed to the purlins/girts in accordance with the manufacturer’s recommendations using patented full length fixing clips supplied. Clips shall be fastened to purlins/girts with screws supplied in accordance with Australian Standard AS3566, Class 3, and attached at every rib. Sheets shall be laid in such a manner that the approved side lap faces away from the prevailing weather. A minimum of 50mm shall be provided for projection into eave gutters.

Flashings shall be provided in compatible materials as specified; minimum cover of flashing shall be 150mm. All sheeting shall be fixed in a workman-like manner, leaving the job clean and weathertight. Repair minor blemishes with touch-up paint supplied by the roof manufacturer. All debris (nuts, screws, cuttings, filings etc.) shall be cleaned off daily.

Where the Stramit FarLap® roof lap joint system is to be incorporated add the following to the specification above: All roof lap joints shall be constructed using the Stramit FarLap® roof lap joint system detailed and fixed strictly in accordance with the manufacturers written installation instructions.

Class 4 fasteners should be used <1km from the coast.


A NATSPEC work section is available for this product. Download

Refer to Stramit® Cyclonic Areas Roof and Wall Cladding brochure for information on use in cyclonic regions.

Concealed fixed decking such as Stramit Speed Deck Ultra® Concealed Fixed Decking is the preferred roofing material in alpine areas. This, and many other design suggestions, can be found in Australian Standards HB 106 – ‘Guidelines for Design of Structures in Snow Areas’.

Particular attention is drawn to maintaining an adequate roof slope for snow shedding, and screw fixing of deck pans beneath the ridge capping. Downward load capacities for Stramit Speed Deck Ultra® Concealed Fixed Decking have not been tabulated, but can be assumed to equal the outward capacities shown.

Stramit Speed Deck Ultra® Concealed Fixed Decking has purpose made fixing clips to attach the decking to the purlins. These clips require 3 fasteners positioned between the clip upstands. Please refer to the instruction details to ensure correct operation.

All fastening screws must conform to AS3566 – Class 3.

For connecting clips to purlins use:

The approved system consists of Stramit Speed Deck Ultra® concealed fixed decking 700mm effective cover sheets produced from hi-tensile steel with Class AZ coating to AS1397-2011 in plain or pre-painted finish.

The sheet has 3 ribs 233mm apart and must be secured using Stramit Speed Deck Ultra® clips, with each clip fixed to a steel support of minimum 1.5mm thickness using 3 Buildex® 12-14 x 30mm hex-head fasteners.

Fletcher Insulation Roof Rack® refers to both the 75mm and 100mm high spacers, which are fastened using 3 Buildex® 12-14 x 30mm hex-head fasteners to the minimum 1.5mm thick steel supports. The Stramit Speed Deck Ultra® clips are fastened to the Roof Rack® spacers using 3 Buildex® 12-14 x 30mm hex-head fasteners.

Achieved ratings for each assembly:

Please refer to the Stramit Roofing Systems with FM Approved Certification brochure for more details.

Foot traffic limits for Stramit Speed Deck Ultra® Concealed Fixed Decking are shown for 3 alternative foot traffic categories:

Heavy – for applications with repeated maintenance, particularly where personnel may be unfamiliar with correct procedures for walking on metal roofs.

Normal – based on traditional expectations, with moderate maintenance foot traffic using designated footpaths.

Controlled – spans that confirm to AS1562.1 with 1.1kN load specified in AS/NZS1170.1 for R2 - Other Roofs. These require minimal careful foot traffic only on the designated footpath. Suggested for use only where occasional aesthetic imperfections from foot traffic are acceptable.

Tables are based on tests to AS1562.1 and AS4040 parts 0 and 1.

For more information on foot traffic performance of Stramit's roofing profiles refer to Stramit's Foot Traffic Guide.

Speed Deck Ultra® Concealed Fixed Decking is manufactured from hi-tensile G550 colour coated steel, aluminium-zinc-magnesium alloy or zinc-aluminium alloy coated steel. In some locations galvanised and severe environment colour coated steel may be available by arrangement.

Colour coated steels are in accordance with AS/NZS2728 – Category 4 and, for the substrate, with AS1397. Aluminium-zinc-magnesium alloy coated AM100/AM125, zinc-aluminium alloy coated AZ150 and galvanised Z450 conform to AS1397. 

Stramit has a comprehensive range of colours as standard. Ask your nearest Stramit location for colour availability. 

The minimum roof slope for Stramit Speed Deck Ultra® Concealed Fixed Decking is 1 degree for many applications.

The spans shown below take account of 'normal' foot traffic and wind resistance including local pressure zone effects. Pressures are based on AS4055 or AS/NZS1170.2.

Where the two standards differ, the worst case has been taken for each classification. Data should only be used for buildings 7m or less in height, 16m max width and length less than 5 times the width and unaffected by land topography with max slope of 35°.

* Where roof pitch < 10 degrees, use spans given in red italics for roof corners. Where roof pitch ≥10 degrees, use spans in red italics for ridge/edge corners. Internal spans must have both end spans 20% shorter. TC - Terrain category. FS, PS, NS - Full, partial and no shielding. Internal pressure coefficient +0.2/-0.3, external pressure coefficient -0.9. Values are only valid for use with steel members of 1.5mm or thicker. Where thinner supports are used, fastener capacity must be checked. Refer to Stramit® Top Hat & Battens Product Technical Manual for more information. 

For more specific applications Speed Deck Ultra® decking must be designed to the pressure and foot traffic limitations indicated. 

Spans may exceed those shown in this table, provided the wind pressure and foot traffic limits are not exceeded. 

Stramit Speed Deck Ultra® Concealed Fixed Decking can be spring curved, concave and convex, including curved ridges, provided it is within the recommended limits below.

*At these radii a maximum support spacing of 1200mm applies, and limit state pressure capacities are reduced by 14% for serviceability and 7% for strength. 


All metal roof sheeting is subject to thermal expansion and this needs to be accommodated where there is a temperature difference between the sheeting and the structure.

The colour of the sheeting will affect the amount of thermal expansion, and whether the sheet is flat or cured will affect its ability to resist without problems. Speed Deck Ultra® Concealed Fixed Decking has excellent resistance to the problems associated with thermal expansion, however sheet lengths should be limited as follows.

*Transport restrictions can apply – check with your local Stramit office.

Longer roof run lengths on a single plane support structure can be readily constructed using the Stramit FarLap® roof lap joint system.

Stramit Speed Deck Ultra® Concealed Fixed Decking has excellent water-carrying capacity. This and the decking stiffness enable roof slopes to be as low as 1° for many applications.

Roof run lengths are the combined lengths of all roof elements contributing to a single pan drainage path. This can include the roof length upstream of a roof penetration that concentrates flow into other pans.

The table below gives slopes for 100 year return period rainfall intensity.

Based on AS1562.1

For more information on water carrying performance of Stramit Speed Deck Ultra® Concealed Fixed Decking and other Stramit roofing profiles refer to Stramit's Roof Slope Guide. Maximum water protection is also ensured by the absence of fastener penetrations when using Stramit Speed Deck Ultra® Concealed Fixed Decking.

Derived from testing, the following tables give the wind load resistance for both serviceability and strength limit states.

Tables are based on testing to AS1562.1 and AS4040 parts 0 and 2. Internal spans must have both end pans 20% shorter.

Values only valid for use with steel support members 1.5mm or thicker. Where thinner supports are used, fastener capacity must be checked. 

Refer to Stramit® Cyclonic Areas Roof and Wall Cladding Brochure for information on use in Cyclonic Regions. 

Installation Information close-medium-white

Stramit's cladding can be easily cut, where required, using a power saw with a cold cut saw blade or a power nibbler and, for localised cutting, tin snips. Avoid the use of abrasive discs as these can cause burred edges and coating damage. Please dispose of any off-cuts carefully and thoughtfully.

The Stramit FarLap® roof lap joint is a patented revolutionary system that changes the way long run roof decking is designed and installed. It provides a multiple sheet option for long length concealed fixed roofing projects that eliminates traditional step joints or the need for long on-site rolled sheets, without compromising the integrity of the roofing structure.

Designed specifically for Stramit Speed Deck Ultra® Concealed Fixed Decking, the Stramit FarLap® roof lap joint system allows the installation of lapped sheets on standard purlin framing, without the need for conventional stepped jointing. The system provides a combination of a strong joint and a weather-resisting seal between lapped sheets.

The system is simply installed by clipping onto the ribs of the bottom sheet. The top, overlapping sheet is then pushed on to the Stramit FarLap® units, providing a structural connection. The joint connectors and sealing foam are manufactured from high technology materials that provide strength and weather-resistance and preserve the existing roofing warranty.

Stramit FarLap® roof lap joints can only be used with Stramit Speed Deck Ultra® Concealed Fixed Decking and with the following provisions:

  • installed on roofs specifically designed for its use
  • all purlins must be in a single plane, ie no step down
  • purlins must be spaced to allow for sheeting end spans on either side of the joint, and
  • translucent sheeting joints must coincide with the decking joint.

Stramit FarLap® lap joints are readily installed on Stramit Speed Deck Ultra® decking. No additional fasteners are required. Stramit Speed Deck Ultra® Concealed Fixed Decking sheets are installed in the normal manner, except that:

  • Alignment of the first row of clips for both the lower and all upper runs should be determined before commencing deck laying on the lower run. This ensures that decking in upper runs is accurately aligned with the lower run.
  • Sheet ends at the lap joints must be turned up and down using the FarLap® turn-up/down tool. Install the lower run and turn up the sheet ends, then install the upper run before turning down the lower ends of the upper sheets.
  • The sheet overlap must be at least 350mm.
  • Translucent sheeting for a lower run should be fixed before laying decking on an upper run.

When installing the Stramit FarLap® units:

  • Install on the deck above the metal Speed Deck Ultra® clips (within 50mm).
  • Connect each unit to the next by removing and then joining with the link piece.
  • Ensure that every decking rib has an independent plastic connector fitted (cut the foam to obtain a start, or final portion from a full unit if needed, ensuring the foam slot coincides with the upper sheet underlap).

Stramit Speed Deck Ultra® Concealed Fixed Decking is readily installed with or without fibreglass insulation blanket. If practical lay sheets in the opposite direction to prevailing weather.

Installation of Stramit Speed Deck Ultra® Concealed Fixed Decking is a straightforward procedure using the following fixing sequence.

  • Ensure all purlins are in line and correctly installed. Using a string line or the edge of the first sheet, align the first row of fixing clips. Screw the clips to the purlins in the same order as the direction of laying.
  • Locate the first sheet over the clips with the correct projection at each end of the sheet. Snap each rib on to the clip at every purlin, always in the order of the direction of laying. Note – Do not use undue force; the deck will easily accommodate clip entry.
  • Snap ribs on to clip in order – 1-2-3.
  • Hinge next clip about trailing edge of the first sheet, allowing it to fall to the purlin. Ensure correct fitting to the deck edge and that it is sitting on the extended tail of the preceding clip. Align fixing holes together then fasten clip to purlin as before.
  • Continue to lay sheets as before. From time to time measure coverage of sheets at ridge and eaves to maintain squareness.
  • At end of purlin cut fixing clip (and, if necessary, the roof sheet) to suit.
  • Turn up ends of sheet at ridge and turn down eaves ends into gutters using the Stramit Speed Deck Ultra® Concealed Fixed Decking turn up/down tool.
  • Secure leading and trailing edge of the roof with a full or cut-back clip, or sealed fasteners through the roof tray, at every purlin. Cover these with side flashings. Install all flashings as required to weatherproof and complete the roof.
  • Clean the roof after each day’s work, removing all screws, cuttings, swarf etc, and leave roof clean and watertight. Repair any minor blemishes in colour coated finishes with Stramit supplied touch-up paint.
  • Each clip box has an illustration of the basic clip fixing technique. A more detailed Installation Procedure leaflet (with clear illustrations) is available to assist fixers on site. Ask for a copy to be sent with your order.

Installation details for the FarLap® roof lap joint system and SkyLap® joint system for translucent sheeting are provided in separate supplements included in each box of units. 

For use in conjunction with Stramit FarLap® joint system, Stramit Skylap® joint is only suitable for the fibreglass over fibreglass joint and the edge joint of the fibreglass over Stramit Speed Deck Ultra® decking joint.

Fibreglass sheet overlaps should be a minimum of 350mm as per the normal Stramit FarLap® recommendations. Stramit's Skylap® documentation outlines installation instructions.

Free underlap sheet edges may be encountered when using translucent sheeting, may need additional support. Use a 40mm x 40mm x 1.0mm trim angle beneath the underlap and screwed to the purlins if spans exceed 1500mm for 0.42BMT, and 2000 for 0.48BMT.

Maintenance Information close-medium-white

Below are some handy hints and tips to achieve maximum life from your COLORBOND® and ZINCALUME® finished products.

  • In areas of little rainfall, products should be cleaned regularly.
  • Brick cleaning acid should not come into contact with steel fascia, gutter, or roofing and walling.
  • Never immerse these products in sand, soil or concrete.
  • Do not use touch up spray can paint on COLORBOND® steel.
  • Remove metal debris from cutting and/or drilling to avoid swarf damage.
  • Prior to installation, keep bundled material dry.
  • Prepainted metal roofing components should be stored in the shade as the protective plastic film will become difficult to remove if it is exposed to direct sunlight.
  • Make sure materials made of different metal, such as copper and lead, do not make contact with these products, and water does not run from one to the other.
  • Roofing and guttering should be free draining and free from dirt and leaves.