Stratco Prodek is a versatile roofing material, designed to suit a wide range of applications, from verandah and carport installations to long length industrial roofing projects. The unique Prodek profile offers superior spanning ability, excellent water carrying capacity and impressive rigidity. Combine these advantages with a fast, easy pierced fixing installation and you have an economical profile that is ideal for use on industrial roofing.
Product Details
Technical Information
Installation Information
Prodek® Installation Information
Fixing Recommendations
Lay Prodek sheets into the prevailing wind. They should sit neatly on the preceding sheet, and be fixed at the recommended support spacings. Avoid ‘stretching' the width of the sheet when installing, as this could allow wind and rain to enter. Flashing turn downs into the pan of Prodek should always be notched around the rib for maximum weather tightness. For spans between 1200mm and 3600mm, side lap fasteners are recommended for use at mid-span. For spans beyond 3600mm use two evenly spaced fasteners between supports to secure the side lap. Use either 8 x 12mm self drill stitching screws or 4.8mm sealed blind rivets. On roofing, at the end of the sheets, turn the pans up at the roof crest and down into the gutter using a turn up/down tool.
Prodek Fixing and Laying Directions - Non-Cyclonic Areas
Note: The following recommendations apply to non-cyclonic areas.
All fasteners must have neoprene washers.
Roofing - Each crest requires one fastener.
Walling - Each pan requires one fastener. Fasten adjacent to overlapping rib.
Side lap fixing is recommended to maintain a weather proof seal and secure the overlap, especially when the roof is walked on occasionally. Use either 8x12 mm self drill stitching screws or 4.8mm sealed blind rivets.
For both roofing & walling applications, it is recommended that side lap fasteners are secured mid span for spans between 2100mm & 3600mm or with 2 evenly spaced fasteners between supports for spans beyond 3600mm.
The below fastener sizes are suitable for fixing over an insulation blanket up to 55mm thick. For thicknesses up to 100mm, the next standard screw length to that indicated is to be used.
Prodek Fastener Selection
ROOFING Crest fixing
WALLING Pan fixing
Fixing to Steel Self drilling and tapping screw with neoprene washer
12 x 68mm
10 x 16mm
Fixing to Timber Type 17 hex head screw with neoprene washer
14 x 90mm
10 x 25mm
Laying procedure
Walking on Prodek
When walking on Prodek roofing, it is recommended you walk over the purlins to avoid damage. Wear flat, rubber soled shoes and walk flat footed in the sheet pans only. For carport and verandah applications, crawl boards should be used to avoid damage during installation and maintenance.
Using Prodek
Stratco Prodek 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/alum and pre-painted steel should not be used in very 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 sheeting. Concrete should not be poured against zinc/alum material. Check with Stratco before using in these severe environments.
Incompatible Metals
The best way of reducing corrosion is to keep incompatible metals apart. Zinc/alum and prepainted steel cannot be used with lead, copper and monel. Galvanised steel and pure zinc material can be used with zinc/alum, but you must avoid water run-off from zinc/alum onto galvanised material. Fixings such as rivets and self-drilling screws must be compatible with the material they are fixing.
Handling and Cutting of Prodek
For safety, wear gloves when handling Prodek. Ensure your hands or gloves are clean, especially when handling zinc/alum which can mark. Use a coloured pencil for marking steel, as lead or black pencils contain graphite which promotes rusting. Prodek 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. Prodek 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.
Prodek has been designed with versatility in mind. It possesses a modern, attractive profile that has the strength and flexibility to be used for a wide variety of applications. It is ideal for use on anything from long length industrial roofing to verandah, patio and carport installations.
Prodek is designed to provide maximum weather protection. The 50mm high rib on Prodek reduces the risk of wind driven rain entering the roof and ensures that water is channelled into the pan area of Prodek. It has a non-syphoning side lap which reduces the risk of moisture transfer between sheets due to capillary action, thus reducing the risk of roof leakage. In addition, turn up/down tools are available to assist in weatherproofing the end of the Prodek sheets.
Custom made for your project
For lengths longer than 1.2 metres Prodek can be rolled to the specific length you require, provided satisfactory transport and handling facilities can be arranged. For lengths longer than ten metres, consult your nearest Stratco for advice on handling and transport.
Prodek is available in un-painted zinc/alum, and in an attractive range of factory pre-painted colours. 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 Prodek, and can provide professional advice on specific flashings.
Ordering
Sheets are available custom cut, allowing you to minimise waste, and enhance your design options. Prodek is available in un-painted zinc/alum, and in an attractive range of factory prepainted 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 directly above structural members, they must be of sufficient strength, such as over portal frames, or braced roof trusses.
Maintenance Requirements
The performance of Prodek 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 used in severely corrosive environments, cleaning should be performed more often. It is important that screws have the same life expectancy as the cladding you have specified.
The minimum recommended roof pitch for Prodek is one degree (1 in 60). With a one degree fall, ensure that building settlement or the warping of timber structural sections does not cause ‘ponding' on the surface of the roof. The 650mm coverage of Prodek provides easy handling and installation. Prodek roofing is subject to thermal expansion, particularly on darker colours. The maximum length before an expansion joint is required is 24 metres for lighter colours, and 16 metres for darker colours.
Compliance
The Wind Capacity Tables are based on testing in accordance with AS1562.1-1992 and AS4040.0, 1 & 2- 1992. Span tables have been developed by determining wind pressures in accordance with AS4055-2006 for domestic applications and AS/NZS 1170.2:2002 for all other applications. Capacity tables are in limit state format.
Spans
Spans are determined by wind speeds for non-cyclonic areas. For domestic applications, the pressures and spans are based on a maximum: eaves height of six metres, roof pitch of 35 degrees and total roof height of 8.5 metres. For commercial and industrial applications, 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 and walling spans for both strength and serviceability limit states. Roof spans allow for loads incidental to maintenance.
All pressures have been determined assuming the wind loading in any direction is not affected by topography. The following shielding factors have been used for each of the terrain categories: Category 3 = 0.85, Category 2.5 = 0.95, and Category 2 = 1.
The 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.
Maximum Recommended Spans (mm)
Maximum Recommended spans
Span Type
Roofing BMT
Walling BMT
0.42mm
0.48mm
0.35mm
0.42mm
0.48mm
Single Span
2600
3100
2400
3000
3600
End Span
2800
3400
2700
3500
4000
Internal Span
3200
3800
3000
3800
4200
Unstiffened Overhang
200
250
150
200
250
Stiffened Overhang
600
650
400
600
650
Roofing : Spans are limited based on typical maintenance foot traffic. Walling : Spans based on N1 (W28) wind loading.
Domestic Carport / Verandah Spans (mm)
Wind Classification
Base Metal Thickness
0.42mm
0.48mm
N1 (W28)
3700
4250
N2 (W33)
2950
3750
N3 (W41)
2200
3300
N4 (W50)
2050
3100
Prodek Spans (mm)
Determined by wind speeds for non-cyclonic areas
Base Metal Thickness
Application
Type of Span
Wind Classification
N1 (W28)
N2 (W33)
N3 (W41)
N4 (W50)
0.35mm
Walling
Single
2400
2350
1950
1600
End
2700
2700
2050
1800
Internal
3000
3000
2200
1800
0.42mm
Roofing
Single
2600
2050
1850
1550
End
2800
2500
1900
1550
Internal
3200
2750
2050
1650
Walling
Single
3000
2700
2050
1800
End
3500
3100
2200
1800
Internal
3800
3400
2800
1950
0.48mm
Roofing
Single
3100
3100
2350
1850
End
3400
3400
2350
1850
Internal
3800
3800
2900
2000
Walling
Single
3600
3600
3100
2200
End
4000
3900
3300
2200
Internal
4200
4200
3700
2500
Values applicable for use with steel supports of minimum 0.95mm thickness, G550.
Note: For Prodek span table wind capacities, design parameters and span definitions, please refer to the Cladding Wind Capacities tables and Engineering notes at the beginning of the Roofing and Walling section.
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 the correct classification using table below.
Wind Classification (domestic)
Region & Category (Commercial / Industrial)
N1 (W28)
Reg A, Cat 3
N2 (W33)
Reg A, Cat 2.5 - Reg B, Cat 3
N3 (W41)
Reg A, Cat 2 - Reg B, Cat 2.5
N4 (W50)
Reg B, Cat 2
Wind Capacities
Wind Capacities (kPa)
BMT
Span Type
Limit State
Span (mm)
1200
1500
1800
2100
2400
2700
3000
3300
3600
3900
4200
4500
0.35mm
Single
Serviceability
2.05
1.72
1.40
1.08
0.92
0.82
0.71
0.61
0.51
0.40
0.30
0.19
Strength
4.60
3.75
2.89
2.04
1.46
1.35
1.25
1.14
1.03
0.92
0.82
0.71
End
Serviceability
2.46
2.12
1.77
1.42
1.08
0.97
0.86
0.75
0.64
0.53
0.42
0.31
Strength
5.38
4.46
3.54
2.23
1.69
1.58
1.47
1.36
1.25
1.14
1.03
0.92
Internal
Serviceability
2.67
2.31
1.95
1.59
1.23
1.10
0.98
0.85
0.73
0.60
0.47
0.35
Strength
5.58
4.54
3.50
2.46
1.85
1.74
1.63
1.52
1.41
1.30
1.19
1.08
0.42mm
Single
Serviceability
3.23
2.54
1.85
1.15
1.04
0.93
0.82
0.70
0.59
0.48
0.42
0.37
Strength
6.08
4.87
3.67
2.46
2.31
2.16
2.01
1.87
1.72
1.57
1.42
1.27
End
Serviceability
3.46
2.79
2.13
1.46
1.31
1.15
1.00
0.85
0.69
0.54
0.46
0.38
Strength
6.04
4.79
3.55
2.31
2.18
2.05
1.92
1.79
1.66
1.53
1.41
1.28
Internal
Serviceability
4.08
3.42
2.75
2.09
1.43
1.28
1.13
0.98
0.83
0.68
0.65
0.63
Strength
6.35
5.18
4.01
2.85
2.64
2.43
2.22
2.01
1.79
1.58
1.50
1.42
0.48mm
Single
Serviceability
4.23
3.59
2.96
2.32
1.68
1.50
1.32
1.13
0.95
0.77
0.58
0.40
Strength
6.63
5.75
4.88
4.00
3.12
2.85
2.58
2.31
2.04
1.78
1.51
1.24
End
Serviceability
4.62
3.96
3.31
2.65
2.00
1.79
1.58
1.37
1.16
0.95
0.74
0.53
Strength
6.54
5.63
4.71
3.79
2.87
2.67
2.46
2.26
2.06
1.85
1.65
1.44
Internal
Serviceability
4.77
4.13
3.50
2.87
2.23
2.02
1.81
1.60
1.39
1.18
0.97
0.76
Strength
6.70
5.89
5.08
4.27
3.46
3.19
2.92
2.65
2.37
2.10
1.83
1.56
the values are for use with steel supports with a minimum thickness of 0.95mm, G550.
Water Carrying Capacity
Maximum Roof Run for Drainage (m)
Roof Slope
Peak Rainfall Intensity (mm / hr)
150
180
200
250
300
350
400
450
1°
319
266
239
191
159
137
119
106
2°
452
377
339
271
226
193
169
150
3°
554
461
415
332
271
237
207
184
5°
716
596
537
429
358
307
268
238
7.5°
878
732
658
527
439
376
329
292
10°
1016
847
762
610
508
436
381
338
The peak rainfall intensities shown represent a 100 year average recurrence interval (ARI) for a five minute rainfall duration. If roof penetrations exist, the total roof run will generally be greater than the distance from ridge to eaves at the location the penetration interferes with the runoff. Contact Stratco if further advice is required.
