Stramit Speed Deck Ultra® Concealed Fixed Decking

Specifications

Features

  • Wide Cover - fewer sheets and quicker installation.
  • Deep Ribs - stronger and stiffer with better water carrying capacity; roof slopes as low as 1°.
  • Full Length Clips - to locate ribs and compress insulation.
  • Four Fixing Points Per Clip - with centralised fastening for unsurpassed strength.
  • Hexagon Head Screws - bigger, stronger and easier to install, with less wastage.
  • Outstanding Wind Load Resistance - improved security with lower purlin costs.
  • Spring Curving - data for arched and curved roofs.
  • Automatic Bird Proofing - built in accessory with no need for extra components.
  • Compatible lap joint system
    • allows in-plane long run roofs
    • provides solution for limited access sites.

Australian Design Award 

Stramit Speed Deck Ultra® decking, winner of a 1995 Australian Design Award for “using the properties of high tensile steel to their best advantage through good design practices”.
  

Applications 

The visual appeal, strength, wide cover, light weight and weather resistance of Stramit Speed Deck Ultra® decking make it perfect for all commercial roofing applications. Its excellent strength and ease of assembly allow for long, economical spans.The large water-carrying capacity and weather-tightness permit very low roof pitches, leading to economies in the building structure. 

Stramit Speed Deck Ultra® decking may also be used for domestic applications.

Materials 

Stramit Speed Deck Ultra® decking is manufactured from hi-tensile G550 colour coated steel or zinc-aluminium alloy coated steel. In some locations galvanised and severe environmental colour coated steel may be available by arrangement. Colour coated steels are in accordance with AS2728 – Category 3 and, for the substrate, with AS1397. 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. 

Overlapping Roof Sheets

For long run roofs that exceed the maximum recommended sheet lengths, and for awkward sites where trunk or crane access is limited, the Stramit Farlap® roof lap joint system is available. This enables overlapping sheets to be simply and reliably attached without the need for a traditional step joint. The roof support structure can be designed and fixed in a single plane. Refer to Stramit Farlap® roof lap joint system product technical supplement for full details of the product.

Adverse Conditions 

Stramit Speed Deck Ultra® decking will give excellent durability in almost all locations. With all of its fastenings protected beneath the decking, Stramit Speed Deck Ultra®  decking can be expected to outlast through-fixed roofing. It is however important to choose the correct coating for each application environment. Please refer to the table on page 3 of the Stramit Speed Deck Ultra® Product Technical Manual, shows the suitability of coating types for different exposure conditions.

Compatibility 

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

Contact Stramit for more detailed information.

Testing 

Stramit has in-house, purpose built, testing equipment used to design, develop and improve products for the Australian market. In addition many Stramit products are tested or witnessed by independent organisations. This ongoing research and development activity ensures that Stramit remains at the forefront of innovation, design and consumer information.

Architectural Specification 

This specification can be found on the Stramit website and can be easily downloaded onto your documentation.

The roofing/walling shall be 0.42 (or 0.48) mm BMT Stramit Speed Deck Ultra® 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 AZ150 zinc-aluminium coating with or without an oven-baked paint film of selected colour. 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 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.

Design

Spans 

The spans shown below take account of ‘normal’ foot traffic and wind resistance including local pressure zone effects. Pressures are based on AS4055 or AS1170.2 . 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, 1000m2 or less in area and unaffected by land topography.

STRAMIT SPEED DECK® ULTRA DECKING – MAXIMUM SPAN CHART (mm)
 roofswallsoverhangs
bmt
(mm)
 Pressure (kPa) internal
(end) span
combin
-ation
 Pressure (kPa) internal
(end) span
combin
- ation
  
service
-ability
stren
- gth
double
spans
equal
spans
service
-ability

stren
- gth

double
spans
equal
spans
free
edge
stiff
-ened
edge
N1 or Region A (sheltered suburban)
0.420.761.35170017002100
(1750)
0.611.04300028503000
(2500)
150450
0.480.761.35230023002700
(2250)
0.611.04300029003000
(2500)
200500
N2 or Region B (sheltered suburban) and Region A (exposed suburban)
0.420.781.94170017002100
(1750)
0.611.49300028503000
(2500)
150450
0.480.781.94230023002700
(2250)
0.611.49300029003000
(2500)
200500
N3 or Region A (rural) and Region B (exposed suburban)
0.421.182.96170017002100
(1750)
0.922.25260023502900
(2450)
150450
0.481.182.96205022502550
(2150)
0.922.25265024502950
(2500)
200500
Internal spans must have both end spans 20% shorter. Values are only valid for use with steel members of 1.5mm or thicker. For more specific applications Stramit Speed Deck Ultra®  Decking must be designed to the pressure and foot traffic limitations below. Spans may exceed those shown in this table, provided the wind pressure and foot traffic limits are not exceeded

Pressures

STRAMIT SPEED DECK® ULTRA DECKING – SERVICEABILITY LIMIT STATE CAPACITY
bmt
(mm)
fasteners
per sheet
per purlin
span
type
pressure (kPa) at the spans (mm) shown
6009001200150018002100240027003000
0.421 clipinternal2.812.812.532.241.961.681.391.110.83
andequal2.862.862.472.081.681.290.900.51 
3 screwsdouble2.332.332.081.841.601.361.120.870.63
0.481 clipinternal3.123.122.802.492.181.861.551.230.92
andequal3.173.172.742.301.871.441.000.57 
3 screwsdouble2.582.582.312.041.781.511.240.970.70

 

STRAMIT SPEED DECK® ULTRA DECKING – STRENGTH LIMIT STATE CAPACITY (Non-cyclonic)
bmt
(mm)
fasteners
per sheet
per purlin
span
type
pressure (kPa) at the spans (mm) shown
6009001200150018002100240027003000
0.421 clipinternal7.917.916.165.074.323.783.363.032.77
andequal7.867.865.824.623.823.252.832.502.24
3 screwsdouble8.008.005.714.403.552.972.542.211.95
0.481 clipinternal8.558.556.655.474.674.083.633.272.99
andequal8.498.496.294.984.123.513.052.702.42
3 screwsdouble8.648.646.174.753.843.202.742.392.11
Tables based on testing to AS1562 and AS4040 parts 0.2 and 3. Internal spans must have both end spans 20% shorter.
Values only valid for use with steel support members of 1.5mm or thicker.

Foot Traffic

Foot traffic limits for Stramit Speed Deck Ultra® decking are shown for three alternate foot traffic categories.

These are:

  • High Maintenance – 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 foot paths.
  • Controlled – spans that conform to AS1562 but require minimal careful foot traffic only on the designated foot path. Suggested for use only where occasional aesthetic imperfections from foot traffic are acceptable.
STRAMIT SPEED DECK ULTRA® DECKING –
FOOT TRAFFIC LIMITED SPANS (mm)
bmt
(mm)
span
type
foot traffic limits
high maintenancenormalcontrolled
0.42internal110021002700
equal70017002250
double70017002250
0.48internal140027003600
equal90023002700
double90023002700
Tables are based on tests to AS1562 and AS4040 parts 0 and 1

For more information on foot traffic performance of Stramit Speed Deck Ultra® decking and other Stramit® roofing profiles refer to Stramit’s Foot Traffic Guide.

Spring Curving 

Stramit Speed Deck Ultra® decking can be spring curved, concave and convex, including curved ridges, provided it is within the recommended limits below:   

STRAMIT SPEED DECK ULTRA® DECKING –
SPRING-CURVED RADII LIMITS (m)
restricted minimum*unrestrictedunrestricted
0.42 bmt0.48bmtminimummaximum
90*70*100225
*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.

For more comprehensive information on spring-curving Stramit Speed Deck Ultra® decking and other Stramit® roofing profiles refer to the Stramit® Spring Curving Guide.

Designing for Snow 

Concealed fixed decking such as Stramit Speed Deck Ultra® 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® decking have not been tabulated, but can be assumed to equal the outward capacities shown.

Thermal Expansion 

All metal roof sheeting is subject to thermal expansion and, where there is a temperature difference between the sheeting and the structure, this needs to be accommodated. The colour of the sheeting will affect the amount of thermal expansion, and whether the sheet is flat or curved will affect its ability to resist without problems. 

Stramit Speed Deck Ultra
® decking has excellent resistance to the problems associated with thermal expansion. Nevertheless sheet lengths should be limited to those shown below. 

STRAMIT SPEED DECK ULTRA® DECKING –
MAXIMUM SHEET LENGTH (m)
roof colourlightdark
Flat4230
Spring-curved3020

Longer roof run lengths ona  single plane support structure can be readily constructed using the Stramit Farlap® roof

Water Carrying 

Stramit Speed Deck Ultra® decking has excellent watercarrying capacity. This and the decking stiffness enable roof slopes to be as low as one degree 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. This table gives slopes for 100 year return period rainfall intensity and located on page 5 of the Speed Deck Ultra® Product Technical Manual

For more information on water carrying performance of Stramit Speed Deck Ultra® decking and other Stramit roofing profiles refer to Stramit® Roof Slope Guide

Maximum water protection is also ensured by the absence of fastener penetrations when using Stramit Speed Deck Ultra® decking.

Cyclonic Areas

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

Installation

Fasteners

All fastening screws must conform to AS3566 - Class 3. For connecting clips to purlins use: 

 

 For steel (0.75bmt or greater)
- No.12 x 30mm hex-head self-drilling and threading screws (available pre-loaded into clips in some locations)
 For timber (F11 or better)
- No. 12 x 50mm hex-head type 17 self-drilling screws

Accessories

Stramit Speed Deck Ultra® decking Clip - supplied in easy to handle boxes of 40 clips
Stramit Speed Deck Ultra® decking End Cap - used with silicone sealant for roof penetrations

Stramit FarLap® roof lap joint system units - supplied in boxes of 20 units.

Installation 

Stramit Speed Deck Ultra® 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®decking is a straightforward procedure using the following fixing sequence:

  1. 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.
  2. 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

  1. 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.
  2. Continue to lay sheets as before. From time to time measure coverage of sheets at ridge and eaves to maintain squareness.
  3. At end of purlin cut fixing clip (and, if necessary, the roof sheet) to suit.
  4. Turn up ends of sheet at ridge and turn down eaves ends into gutters using the Stramit Speed Deck Ultra® decking turn up/down tool.
  5. 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.
  6. 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 Stramit FarLap® roof lap joint system are provided in a separate supplement included in each box of units.

Walking

As with all roofing products, Stramit recommends extra caution be taken when walking on the roof. When walking on Stramit Speed Deck Ultra® roofing always wear flat rubber soled shoes and place feet only in the pans, taking care to avoid the last pan or two near edges of the metal roof area.

Insulation

The unique Stramit Speed Deck Ultra® 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 Stramit for further information.

Unsupported Underlaps

ree underlap sheet edges, such as 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

Good Practice

Stramit recommends that good trade practice be followed when using this product, such as that found in Australian Standards Handbook HB39.

Cutting

Stramit Speed Deck Ultra® decking can be easily cut, where required, using a power saw with a steel cutting 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.

Procurement

Prices

Prices on Stramit Speed Deck Ultra® decking and its accessories and Stramit FarLap® roof lap joint system units can be obtained from your nearest Stramit location or distributor of Stramit® products. As Stramit does not provide any installation service, ask your tradesperson for a supply and fix price. Contact your nearest Stramit location for the names of tradespersons in your area.

Related Products

Ridge Capping
standard or custom dimensions
Flashings
a range of custom flashings
Filler Strips
top and bottom; for eaves, ridge and joint sealing
Use only where sealing is preferred to ventilation
Insulation & roofing mesh
a range of mesh, sisalation, plain & foil backed blanket
Translucent sheeting
fibreglass sheeting in a range of shades and densities

Length

Stramit Speed Deck Ultra® 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

Ordering

Stramit Speed Deck Ultra® decking can be ordered directly, through distributors, or supplied and fixed from a roofing contractor.

Delivery/Unloading

Delivery can normally be made within 48 hours, subject to the delivery location, quantity and material availability, or can be at a pre-arranged date and time. Please ensure that suitable arrangements have been made for truck unloading, as this is the responsibility of the receiver. Pack mass may be up to one tonne. When lifting Stramit Speed Deck Ultra® decking, care should be taken to ensure that the load is spread to prevent damage.

Handling/Storage

Stramit Speed Deck Ultra® decking 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 sheets have become wet, they should be separated, wiped and placed in the open to promote drying.

Extra

Maintenance

Exterior surfaces of metal products unwashed by rain can benefit from occasional washing to remove build-up of corrosive salts. Walls beneath eaves or awnings are such a situation.

Further Information

As well as our standard range of Technical Manuals, Installation Leaflets, Case Studies and other promotional literature Stramit has a series of Guides to aid design. These include:

  • Concealed Fixed Decking
  • Roof Slope Guide
  • Foot Traffic Guide
  • Bullnosing, Curving and Crimping
  • Acoustic Panels
  • Cyclonic Areas
  • Spring Curving Guide 

Please contact your nearest Stramit location for any of these guides or other literature.

Other Products

Stramit offers a wide range of building products, including:

  • Purlins and girts
  • Formwork decking
  • Roof and wall sheeting
  • Lightweight structural sections
  • Truss components
  • Gutters and downpipes
  • Fascias
  • Custom flashings
  • Insulating products
  • Fasteners

Patents

Stramit Speed Deck Ultra® decking is the subject of four patent and two registered design applications in Australia and patents overseas.

References

In preparing this document reference has been made to: 

  • Standards Australia Handbook – HB39
    (Installation code for metal roof and wall cladding)
  • Standards Australia Handbook – HB106
    (Guidelines for the design of structures in snow areas)
  • BlueScope Steel – Technical Bulletin TB-4
    (Maintenance of prepainted steel roofing)
  • BlueScope Steel – Technical Bulletin TB-1
    (Steel roofing and walling products – selection guide)

Availability

Product Availability 

NSWACT TAS VIC SA WA QLD NT
YYYYYYYY

Y - Yes     N - No     S - Subject to project size

Alternatives