LYSAGHT SPANDEK® dirancang sebagai bahan penutup atap dan dinding yang kuat, estetik, dan efisien dengan bentuk gelombangnya yang kontemporer untuk bangunan perumahan, industri, dan komersial. LYSAGHT SPANDEK® juga telah dikenal di Indonesia, Australia, dan negara-negara lain sebagai bahan penutup atap perumahan dan bangunan sosial karena kemudahan dalam penggunaan dan penampilannya yang menarik.


– LYSAGHT SPANDEK® dibuat dari baja bertegangan tarik tinggi ZINCALUME® dan Clean COLORBOND® dari BlueScope Steel. Baja ZINCALUME® adalah baja dengan lapisan yang terdiri dari perpaduan antara 43.5% Seng, 55% Alumunium dan 1.5% Silikon sebagai lapis pelindung terhadap korosi yang tinggi. Ketahanan ZINCALUME terhadap korosi empat sampai lima kali dibanding baja galbani lain – Clean COLORBOND® adalah baja berwarna dengan bahan dasar ZINCALUME®. Penggunaan sistem pengecatan dan lapisan primer yang bermutu tinggi pada ZINCALUME® meningkatkan ketahanan terhadap korosi dan menjamin mutu cat – Multi fungsi untuk aplikasi atap maupun dinding

LYSAGHT® SPANDEK® is a tough, symmetrical trapezoidal ribbed and wall cladding profile. The profile is rollformed with precision from genuine High Tensile G550 ZINCALUME® steel, it is available in a range of attractive and durable Clean COLORBOND® steel proprietary paint systems. Designed to perform at a minimum recommended roof pitch of 3° (1 in 20), LYSAGHT® SPANDEK® capitalises on buildings requiring long spans, it permits wider purlin spacings and utilises fewer fasteners. Its rigid trapezoidal ribs make it an excellent choice among designers for contemporary roof and wall cladding designs. LYSAGHT® SPANDEK® is tested and proven by NATA registered laboratory at BlueScope Lysaght (Research & Development) Sydney – Australia and CSIRO (Commonwealth Scientific and Industrial Research Organisation Australia).


Like other products in the LYSAGHT® range, LYSAGHT® SPANDEK® presents a list of long term benefits and values to customers:-

  • Excellent profile for roofing, walling and fencing applications
  • Trapezoidal ribs can be run vertically or horizontally
  • Aesthetically pleasing and suits contemporary / modern design
  • Tested and proven by NATA registered laboratory in LYSAGHT® TECHNOLOGY (Chester Hill, Sydney – Australia)
  • Tested by CSIRO (Commonwealth Scientific and Industrial Research Organisation– Australia)
  • Conforms to International Building Codes and Standards
  • Manufactured under strict processes governed by ISO9001:2000 (Quality Management System) and ISO14001 (Environment Management System)
  • Excellent Wind Resistance Exceptional strong and light weight
  • Superior against severe rainfall intensity
  • First class resistance against Corrosion, Discolouration and Tropical Dirt Staining
  • Certified Class ‘O’ by Malaysian Fire & Rescue Department
  • Requires no or minimal maintenance
  • All weather performance
  • Genuine LYSAGHT® Material Warranty
  • Genuine LYSAGHT® Product



* For Clean COLORBOND® Ultra steel 0.48mm (Regular / standard), 0.54 (Heavy Duty / non-standard)


The maximum support spacings shown in Table 1 are based on testing in accordance with AS1562 – 1992, “Design and Installation of Sheet Roof and Wall Cladding – Part 1: Metal” and AS4040.1 – 1992 “Methods of Testing Sheet Roof and Cladding Method 1: Resistance to Concentrated Loads”. These roof support spacings are the maximum recommended for adequate performance of the roof cladding under foot traffic loading. The wall spacings are the maximum recommended for buildings up to 10m high in Region B Terrain Category 3 conditions (Vs=38m/s & Vu=60m/s using Cpe=0.65, Cpi=0.2 & KI=2.0). These spacings may be reduced by the Serviceability and Strength Limit States for the particular project under consideration.


* Minimum order is required for 0.48mm BMT, please contact BlueScope Lysaght office

** Span subject to designed live loads & verifications



The wind pressure capacities are based on tests conducted at NATA registered testing laboratory at LYSAGHT® TECHNOLOGY in Sydney, Australia. Testing was conducted in accordance with AS1562.1 – 1992, “Design and Installation of Sheet Roof and Wall Cladding”, and AS4040.2 – 1992, “Resistance to Wind Pressure for Non-Cyclonic Regions”. The table for wind pressure capacities provides pressure versus span graphs for Serviceability and Strength Limit State Design. Serviceability Limit State is based on a deflection limit of: (span/120) + (P/30), where P is the maximum fastener pitch. The pressure capacities for Strength Limit State have been determined by testing the cladding to failure (ultimate capacity). These pressures are applicable when the cladding is fixed to minimum material thickness of 1.0mm. To obtain the design capacity of the sheeting, a capacity reduction factor of 0.90 should be applied. A non-cyclonic area is defined as one in which a tropical cyclone is unlikely to occur in accordance with AS1170.2 -1989, “SAA Loading Code, Part 2: Wind Loads”.


* Minimum order is required for 0.48mm BMT, please contact BlueScope Lysaght office




Notes on Table 3:

  1. Fastening procedures and methods to comply with the strict recommendations of BlueScope Lysaght
  2. Parameters for determining the cyclonic design wind pressures are:K = 1.5 (low pressure zone local factor); Cpi = +0.65; Cpe = -0.90
    Vz = Design fast wind speed (e.g. W41C = 41m/s)
    The design wind pressure is obtained from: Pd = (Cpi – Kcpe) V2z x 0.6 x 10-3 [kPa].
  3. Some support spacings are governed by walk-on requirements.
  4. Specification of support must be of high tensile steel, with a minimum Base Metal Thickness of 1.00mm and minimum yield stress of 550MPa (for more info, please consult BlueScope Lysaght).

* Minimum order is required for 0.48mm BMT, please contact BlueScope Lysaght office


Note on Table 4:

  1. The performance of LYSAGHT® SPANDEK® has been established using cyclic test criteria as specified in NBTC Technical Record 440. The allowable spans in the quick selection tables were obtained by linear interpolation of the design pressures established from those tests and conservative applications of the local pressure factors. These criteria are considered unnecessarily restrictive for use on larger or more complex buildings of the type normally designed by the architect and engineer.
  2. Racking strength provided by the cladding has not been tested and should not be allowed for in the design.
  3. Spans calculated using the Allowable Wind Pressure Tables may variously be governed by fastener load limits, moment induced buckling of the sheeting, or deflection. The resultant pressures are calculated using AS1170 Part 2, 1989 SAA Loading Code – Wind Forces.
  4. The various conditions which affect the design wind speeds, such as geographic location, terrain category etc, are to be taken from AS1170 Part 2, 1989 SAA Loading Code – Wind Forces. The resulting four standardised cyclone wind speeds, 41, 50, 60 and 70m/s (designated as W41C, W50C, W60C and W70C respectively) are used in selection of batten spacing for each of our cladding, most of which vary in their spanning capacity.

* Minimum order is required for 0.48mm BMT, please contact BlueScope Lysaght office




One excellent method of sheeting low slope gable roofs is to run continuous lengths of roof sheeting from eave to eave, across the full width of the roof, allowing the roofing sheets to spring or naturally curve between ridge purlins that are spaced widely apart. This method provides a particularly neat and attractive roof whilst eliminating the ridge capping. Nevertheless, using LYSAGHT® SPANDEK® for construction such as this requires certain precautions to be observed (please refer Table 5).


It should be noted that side laps should be sealed for the length of the curvature (i.e. between the two centre purlins) with BlueScope Lysaght recommended sealants. Each sheet should be first fastened to one side of the roof and then pulled down and fastened to the slope on the other side of the ridge curve. Alternative sheets should be laid from opposite sides of the roof. It should also be noted that over the ridge purlins or battens, very slight crease marks may appear in the trays or valleys of the curved sheeting when subject to foot traffic.



LYSAGHT® SPANDEK® sheeting can also be sprung curved over an arched roof, provided the radius of the arch is not less than the minimum listed in Table 6.


# For radius of curvature greater than the recommended minimum, the purlin spacing must not exceed 2400mm for LYSAGHT® SPANDEK® 0.42mm BMT and 3000mm for LYSAGHT® SPANDEK® 0.48mm BMT.

* Maximum recommended radius to provide sufficient drainage near crest of curvature.

Please note that side laps should be sealed with BlueScope Lysaght recommended sealants over the crest of the arch where the slope is less than the recommended minimum for that sheet profile. If end laps are necessary, they should not be located at or near the crest of the arch and each sheet length must span at least three purlin spacings. The top face of all purlins must accurately follow and be tangential on the arch curvature. Each alternate sheet should be laid from opposite sides of the roof. It should be also noted that over the supports, very slight crease marks may appear in the trays or valleys when curved sheeting is subjected to foot traffic.

From the overall width and required rise of an arched roof, the radius of curvature can be calculated from the formula below:-



LYSAGHT® SPANDEK® can also be sprung curved to the minimum radius shown in Table 7 for concave roof applications.




Crimp curved LYSAGHT® SPANDEK® steel cladding was designed to provide versatility and creativity to bring new and refreshing designs to commercial, industrial and domestic buildings. The combination of curves and contours in convex shapes with flats and angles in LYSAGHT® SPANDEK® have produced many aesthetically pleasing buildings.

This design freedom has resulted in significant cost savings in construction, mainly due to:-

  • Less supporting framework required for fascias, parapets and roofs.
  • Simplified and reduced work involved in installation of fascia cladding.
  • Reduction or elimination of many flashings and cappings.
  • Less cladding material required to cover a given curve.


For the Straight Portion of Crimp Curved LYSAGHT® SPANDEK®

  • Maximum allowable spacings for the straight portion of Crimp Curved LYSAGHT® SPANDEK® should follow the recommendations given in Table 1.
  • End spans refer to the spacing between the first and second supports from any free end of a sheet, expect where that end of the sheet is crimp curved.
  • The spacing between supports either side of an end lap should be as recommended for end spans (refer to Table 1).

For the Crimp Curved Portion of Crimp Curved LYSAGHT® SPANDEK®

These will depend on the radius of curvature but the following guidelines are recommended:-

  • For sheets curved to a radius of curvature not more than 3000mm, supports should be placed at centres not greater than 1800mm.
  • Where a curve of small included angle occurs (up to approximately 15 degree, for example at a ridge), support spacing should not exceed 1200mm.


  • Minimum radius of curvature for convex is 550mm to underside or pan of sheet, minimum straight length of sheet at one end of a curve is 180mm.
  • Maximum length of sheet that can be crimp curved for ridge application is approximately 12000mm. The curve must be convex only. Concave Crimp Curved LYSAGHT® SPANDEK® is not available yet.
  • The sheet can be crimp curved to three quarters of a full circle but to facilitate side lapping, semi circle maximum is recommended.
  • When both ends are crimp curved, the maximum recommended straight distance between the two curves should be 6000mm.
  • For length exceeding 12000mm, please consult BlueScope Lysaght office in your respective area (country).
  • For easy transportation and maximum protection for the crimp curved sheets, the maximum height and length of the sheeting should be 2300mm and 12000mm respectively.

** Alternatively, for crimp-less profile, please ask for our LYSAGHT® SELECT SEAM®, LYSAGHT® LOCKED SEAM, LYSAGHT® CUSTOM ORB® and LYSAGHT® CUSTOM BLUE ORB®


The drainage or run-off capacity of roof sheeting is another limitation on the total length of no’s sheet run that must be considered in roof design and construction. As a guide, Table 8 lists the maximum recommended length of roof run for LYSAGHT® SPANDEK® at the roof slopes and rainfall intensities shown. These are based on CSIRO (Commonwealth Scientific and Industrial Research Organisation – Australia) and BlueScope Lysaght calculation of the behaviour of LYSAGHT® roofing profiles under peak rainfall conditions. The roof run is the total length of roof sheeting draining rainwater in one direction including any end laps, expansion joints or steps that may be present in the roof.



The Pierce-Fixing Concept Pierce-fixing is the method of fixing sheets using fasteners which pass through the sheet. This method is different from concealed-fixing. The screws can be placed through the crests or in the valleys. LYSAGHT® SPANDEK® steel roof cladding must be crest fixed to support. However wall cladding can be either crested of valley fixed.



Rain Noise

To reduce rain noise on metal roof sheeting, an insulation mineral wool blanket can be placed in between 2 metal roof cladding. Anyway, as long as the insulation blanket is held hard against the underside of the roof sheeting this will dampens the rain induced vibration at point of impact and a marked noise reduction is achieved. Otherwise, noise will only be reduced by transmission loss through the mineral wool blanket.

(Note: When using an insulation mineral wool blanket, care should be taken to ensure that it is fully protected from moisture).

Heat Control

The effective method to control the heat is to drape a membrane of the reflective foil laminate over the supports before laying the sheeting or insulation blanket. The laminate can also provide a vapour barrier to minimise condensation. The insulation blanket is often provide the additional heat insulation to overall system.