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Maximus 33 Roofing & Wall Cladding


SKU: M3361448AZ

$37.13 $22.06
$30.94 $18.38 per linear meter
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About this product

Strong and timeless, corrugated roofing and walling. Maximus roof cladding features a very deep 33mm corrugated profile for increased strength and impact resistance.

For trade and project quantity discounts:

Roofing With Strength, Form And Function

Maximus corrugated has a timeless appeal combined with strength and versatility.

Adding more choice and additional features, this deeper, rounder, well-formed Maximus corrugated profile now provides the ultimate solution and adaptability to all steel roofing and walling applications, and is available in two profile depths; Maximus 22 and Maximus 33 in unpainted Zinc/al, as well as an attractive range of pre-painted colours.

Maximus roofing is made from high tensile steel, for strength and impact resistance, and provides maximum versatility, strength and reliability. With the stronger Maximus profile, Stratco offers not only market leading technology and product quality, but now has an extended corrugated roofing product range, offering maximum character, style and a long lasting appearance to all Residential and Commercial applications.

Available Colours

Custom Made For Your Project

For lengths longer than 1.2 metres, Maximus is rolled to the specific length you require, provided satisfactory transport and handling facilities can be arranged. If lengths longer than ten metres are required, consult your nearest Stratco for advice on handling and transport.

To give your roof a professional finish, painted self-drilling screws are available. Stratco offer a complete range of accessories and flashings for use with Maximus, and can provide professional advice on specific flashings.

Cladding Roofing Sheeting Walling Maximus Page 01

Design Considerations

Maximus 33 for a Wall Cladding application is manufactured with a base metal thickness of 0.42 BMT and has an effective cover of 633mm. Roofing application is manufactured with a base metal thickness of 0.48 BMT, has an effective cover of either 614mm or 737mm (colour dependant), and should be installed to a minimum recommended pitch of 2 degrees.

Maximus roofing is subject to thermal expansion. The maximum length before an expansion joint is needed is 24 metres for light colours and 16 metres for dark colours.

Maintenance Requirements

The performance of Maximus over time depends on its correct application and maintenance. Maintenance should be performed as often as is required to remove any dirt, salt and pollutants. Where Maximus is used in severely corrosive environments, cleaning should be performed more often. It is important that screws have the same life expectancy as the Maximus cladding you have specified.

Packs of Maximus 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 dry.

Refer to the Stratco 'Selection, Use and Maintenance' brochure, for more detailed information about the correct use and maintenance of this product.

Ordering Maximus 33

Sheets are available custom cut, allowing you to minimise waste, and enhance your design options. Maximus is available in un-painted zinc/al, and in an attractive range of factory pre-painted colours. Subject to the delivery location, quantity and material availability, delivery is usually within 48 hours, or at an agreed time that suits your building schedule. Unless advised differently, a one tonne maximum is usually applied to larger packs. Arrangements for unloading the truck are the responsibility of the customer, and should be arranged before ordering. When unloading you must ensure the load is adequately spread using spreaders and slings to prevent damage. If packs are to be loaded above structural members, they must be of sufficient strength, such as over portal frames, or braced roof trusses.

Maximus 33


Material Specifications

Material Specifications
Material Properties Finish 0.42mm BMT 0.48mm BMT
Minimum 'AM' Coating Mass (g/m2)
Minimum 'AM' Coating Mass (g/m2)
Zinc/al 125 125
Colour 100 100
Tensile Strength (MPa) Zinc/al & Colour 550 550
Width Coverage (mm) Zinc/al & Colour 633 614
Sheet Tolerances (mm) Length & Width ±5 ±2 ±5 ±2
Minimum Roof Pitch Zinc/al & Colour N/A
(0.42 available for walling only)

Material Mass

COIL     Mass
Width Gauge Cover Finish lm m2 m2 p/t
990 0.48 737 Colour 3.89 5.28 189
990 0.48 737 Zincalume 3.86 5.24 190
940 0.48 614 Colour 3.69 6.01 166
940 0.48 614 Zincalume 3.66 5.97 167
940 0.42 633 Colour 3.25 5.13 194
940 .42 633 Zincalume 3.23 5.10 196

Maximum Recommended Spans

Maximum Recommended Spans (mm)
Span Type Walling (BMT) Roofing (BMT)
0.42mm 0.48mm
Single Span 2400 1300
End Span 2700 1600
Internal Span 2700 2500
Un-stiffened Overhang 400 250
Stiffened Overhang 400 450

Roofing: Spans are limited based on typical maintenance foot traffic.
Walling: Spans are based on N1 wind loading, refer to the Spans table for additional wind allocations.

Carport / Patio Spans

Carport / Verandah Spans (mm)
Wind Classification Base Metal Thickness 0.48mm
N1 (W28) 2700
N2 (W33) 2450
N3 (W41) 2200
N4 (W50) 2100

For carport and verandah applications, utilise crawl boards or ladders over roofing to avoid damage during installation and maintenance. Always ensure boards or ladders are stable and will not slide.

Spans According to Wind Speed

Spans (mm) - Determined by Wind Speeds for Non Cyclonic Areas
BMT Application Span Type Wind Classification
N1 (W28) N2 (W33) N3 (W41) N4 (W50)
0.42mm Walling Single 2400 2200 1900 1800
Double 2700 2650 2350 2250
End 2700 2650 2350 1800
Internal 2700 2650 2350 1800
0.48mm Roofing Single 1300 1300 1300 1300
Double 1600 1600 1600 1600
End 1600 1600 1600 1600
Internal 2500 2350 1800 1600

0.40mm and 0.42mm BMT Maximus walling values are applicable for use with steel supports of minimum 0.75mm thickness, G550.
0.45mm and 0.48mm BMT Maximus roofing values are applicable for use with steel supports of minimum 1.0mm thickness, G550.
Note: End and Internal spans are applicable for cladding spanning over three or more continuous spans.

Wind Capacities

Wind Capacities (kPa)
BMT Span Type Limit State Span (mm)
900 1200 1500 1800 2100 2400 2700
0.42mm Walling Single Serviceability 2.80 2.27 1.80 1.40 1.06 0.78 -
Strength 8.53 6.96 5.58 4.40 3.41 2.62 -
(4 Screws)
Serviceability 5.17 4.03 3.06 2.26 1.63 1.18 0.90
Strength 9.70 7.88 6.37 5.17 4.27 3.68 3.40
End / Internal Serviceability 2.30 2.04 1.81 1.59 1.39 1.21 1.05
Strength 7.35 5.55 4.44 3.42 2.69 2.25 2.10
0.48mm Roofing Single Serviceability - 2.39 1.97 1.59 1.24 0.93 0.65
Strength - 9.50 7.67 6.23 5.17 4.49 4.20
Double Serviceability - 4.51 3.41 2.51 1.80 1.28 0.95
Strength - 9.85 8.39 7.18 6.23 5.55 5.12
End / Internal Serviceability - 2.35 1.97 1.66 1.41 1.22 1.10
Strength - 7.82 6.35 5.16 4.27 3.67 3.36

Values shown for 0.4 and 0.42mm Maximus are applicable for walling applications and use with steel supports of minimum 0.75mm thickness (G550). 0.45mm and 0.48mm Maximus values are applicable for roofing applications and minimum 1.0mm supports (G550).
Note: In roofing applications, if fixing  0.48mm BMT Maximus to 0.55mm supports, 0.40mm BMT Maximus capacities must be used and if fixing to 0.75mm BMT supports, 0.42mm BMT Maximus capacities are applicable.
Note: End / Internal capacities are applicable for cladding spanning over three or more continuous spans.

Water Carrying Capacity

Maximum Roof Run For Drainage (m)
Roof Slope Peak Rainfall Intensity
150 mm/hr 200 mm/hr 250 mm/hr 300 mm/hr 350 mm/hr 400 mm/hr
79 59 47 39 34 29
97 73 58 48 41 36
126 94 75 63 54 47
7.5° 154 115 92 77 66 57
10° 178 134 107 89 76 67
15° 220 165 132 110 94 82

The peak rainfall intensities shown represent a 100 year average recurrence interval (ARI) for a five minute rainfall duration.
If roof penetrations exist, the actual roof run will typically be larger than the distance from ridge to eaves due to penetration/s interfering with the runoff. Contact Stratco if further advice is required.


Wind Capacity Tables are based on testing in accordance with AS1562.1-1992 and AS4040.0, 1 and 2-1992. Span tables have been developed by determining wind pressures in accordance with AS4055-2006 for domestic applications. Capacity tables are in limit state format.


Spans are determined by wind speeds for non-cyclonic areas. For domestic applications, the pressures and spans are based on an eaves height not exceeding 6m, a roof pitch no greater than 35° and a total roof height of maximum 8.5m. For commercial and industrial applications, span tables are based on a maximum overall height of ten metres and a 500 year design return period.

Roofing calculations are based on Cpe=-0.9 and Cpi=0.2, walling is based on Cpe=-0.65 and Cpi=0.2. A local pressure factor, Kl=2.0 has been used for all roofing spans for both strength and serviceability limit states. Roof spans take into consideration loads incidental to maintenance.

All pressures have been determined assuming wind loading in any direction but which is not affected by topography. The following shielding factors, Ms, have been used for each of the terrain categories: Category 3 = 0.85, Category 2.5 = 0.95, and Category 2 = 1.

Domestic carport and verandah spans only apply to structures not enclosed by peripheral walls. Spans are based on Cpn=-0.9 and Kl=1.5 applied over the entire span, and are suitable for all span types. Loads on supporting purlins may limit these spans.Stratco can provide additional engineering advice if any design parameters vary from those above.

Cladding Spans

Testing Systems

Stratco have developed purpose built testing equipment for the testing of cladding systems sufficient to ensure the structural adequacy of the product it produces.

Wind Load Conversion

For domestic applications use the appropriate wind classification for the area. To read the span tables for commercial and industrial applications, select the region and category for the area, then convert it to a wind classification using the table below.

Wind Load Conversion
Wind Classification (Domestic) Region and Category (Commercial/Industrial)
N1 (W28) Reg A, Cat 3
N2 (W33) Reg A, Cat 2.5 and Reg B, Cat 3
N3 (W41) Reg A, Cat 2 and Reg B, Cat 2.5
N4 (W50) Reg B, Cat 2

Fixing Recommendations

Maximus sheets should be laid into the prevailing wind and sit neatly on the preceding roof sheet with a side lap as shown in the fastener positions detail below. They should be fixed within the recommended support spacings. Avoid 'stretching' the width of the sheet when installing, as this could allow wind and rain to enter. Side lap fixing is recommended to maintain a weather proof seal and to secure the overlap especially when the roof is walked on occasionally. This is best done with either 8 x 12mm self drilling stitching screws or a 3.2mm blind rivet (rivets should be sealed to prevent water penetration). It is recommended side lap fasteners are secured at maximum 900mm centres for roofing and 1200mm centres for walling. On roofing, at the high end of the sheets, the valleys of each corrugation should be turned up at crest using a turn up tool.

Roof Laying Procedure

Prevailing Wind →

← Laying Direction


Maximus 33 Fastener Selection

Fixing to Steel Roofing

M6 x 50mm TS self drilling screw with neoprene washer


Fixing to Timber Roofing

M6 x 65mm TS self drilling screw with neoprene washer


Fixing to Steel Walling

M6 x 25mm TS self drilling screw with neoprene washer


Fixing to Timber Walling

M6 x 25mm TS self drilling screw with neoprene washer


If fixing over an insulation blanket the next screw length to that indicated may be required with minimum 25mm timber embedment to be maintained.

Maximus 33 Fastener Positions


0.42mm BMT - 3 Screws / Sheet / Support
Single, End and Internal Spans


0.42mm BMT - 4 Screws / Sheet / Support
Double Span Supports



0.48mm BMT - 3 Screws / Sheet / Support
Single, End and Internal Spans


0.48mm BMT - 6 Screws / Sheet / Support
Double Span Supports


Note: End and internal spans are applicable for cladding spanning over three or more supports.

Walking On Maximus

Stratco recommend foot traffic is kept to purlins for safety and to avoid damage during maintenance. When walking on a roof, wear flat, rubber soled shoes and walk flat footed spreading your weight over as many corrugations as possible. For carport and verandah applications, use crawl boards to avoid damage during installation and maintenance.

Using Maximus

Stratco Maximus will have a long, useful life if used according to Stratco specifications. While roofing materials in outer urban and rural areas may have a life-span in excess of 30 years, this can reduce to only a few years in coastal and industrial environments.

Zinc/al and pre-painted steel should not be used in aggressive areas such as near swimming pools and spas. It is important that dirt, soil, compost, paving sand, or other materials which retain moisture are not placed against steel. Concrete should not be poured against zinc/al material. Check with Stratco before using in these areas.

Incompatible Metals

The best way of reducing corrosion is to keep incompatible metals apart. Zinc/al and pre-painted steel cannot be used with lead, copper and monel. Galvanised steel and pure zinc material can be used with zinc/al, but you must avoid water run-off from zinc/al onto galvanised material. Fixings such as rivets and self-drilling screws must be compatible with the material they are fixing.

Handling And Cutting Of Maximus

For safety, wear gloves when handling Maximus. Ensure your hands or gloves are clean, especially when handling zinc/al which can mark. Use a coloured pencil for marking steel, as lead or black pencils contain graphite which promotes rusting. Maximus is best cut using tin snips, but for larger cuts it may be necessary to use a power saw with a steel cutting blade or a power nibbler. Avoid using abrasive discs as they can cause burred edges and coating damage. Where possible cut sheets on the ground, and always clean off any swarf and metal filings progressively during the installation. Dispose of off-cuts carefully.

Insulation And Sealants

The use of blanket insulation is recommended in domestic roofing to assist in temperature, condensation and sound control. Maximus can be used with an insulating blanket up to 55mm thick. Increased thicknesses require longer fasteners and greater care when installing.

When choosing a silicone sealant, ensure it is suitable for roofing and guttering use and of a non-acetic, amine free, neutral cure type. Sealants that smell of ammonia, vinegar or lemons are not usually suitable.

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