The contemporary form of Smartspan features a square corrugated profile. Its nine-rib design provides maximum strength, making it ideal where a very strong but simple appearance is required. Smartspan is a remarkably versatile product with both domestic and industrial applications.
Product Details
Technical Information
Installation Information
Smartspan® Installation Information
Fixing Recommendations
Smartspan sheets should be laid into the prevailing wind and sit neatly on the preceding roof sheet, as shown in the laying procedure 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. If the spans exceed 900mm for roofing or 1200mm for walling, it is recommended that side lap fasteners are used at mid-span. Side lap fixing will help maintain a weather proof seal and will 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). On roofing, at the end of the sheets, the valleys of each corrugation should be turned up at crest of the roof and down into the gutter using a turn up/down tool.
Smartspan Fixing and Laying Directions - Non-Cyclonic Areas
Note: The following recommendations apply to non-cyclonic areas.
All fasteners must have neoprene washers.
Roofing & walling - Internal supports require 3 fasteners per sheet. End supports and laps require 4 fasteners per sheet.
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 3.2 mm sealed blind rivets.
It is recommended side lap fasteners are secured mid span when spans exceed 900mm for roofing and 1200mm for walling.
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.
Smartspan Fastener Selection
ROOFING Crest fixing
WALLING Pan fixing
Fixing to Steel Self drilling and tapping screw with neoprene washer
12 x 45mm or TS M6 x 50mm*
10 x 16mm
Fixing to Timber Type 17 hex head screw with neoprene washer
14 x 65mm or TS M6 x 65mm
10 x 25mm
Laying procedure
* If fixing to 0.55mm thick roof battens, crest fix with M6 x 50mm TS self drillingscrews with neoprene washers. Indicated spans will still apply.
Walking on Smartspan
When walking on Smartspan roofing, it is recommended you walk over the purlins to avoid any damage. Wear flat, rubber soled shoes and walk flat footed, spreading your weight over as many crests as possible. For carport and verandah applications, crawl boards should be used to avoid damage during installation and maintenance.
Using Smartspan
Stratco Smartspan 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 Smartspan
For safety, wear gloves when handling Smartspan. 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. Smartspan 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. Smartspan 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.
Strong, bold and stylish, Smartspan has a ‘square corrugated' form that provides an interesting blend of light and shade wherever it is placed. Smartspan has the looks and versatility to allow it to blend easily with any building style. Its strong nine rib design lends itself for use on roofing, walling and fencing. Smartspan is used on walkways, school buildings, or heavy duty walling in commercial and industrial applications. Smartspan is ideal for architects and builders who are trying to achieve a different look, with maximum serviceability.
Made from high tensile steel for strength and impact resistance, it is ideal for long length industrial uses. Smartspan can be used in continuous lengths, at low roof pitches with generous support spacings. This can provide a real cost saving on most projects. The 24mm high rib is strong and able to channel water quickly. 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.
Custom made for your project
Smartspan sheets longer than 1.2 metres are rolled to the specific length you require, provided the appropriate transport and handling 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 flashings and accessories for use with Smartspan, and can provide professional advice on specific flashings.
Design considerations
Smartspan has a 700mm coverage and the minimum recommended roof pitch is two degrees (1 in 30). Smartspan is subject to thermal expansion. Darker colours are affected more than light, and spring curved sheeting needs additional consideration. The maximum length before an expansion joint is needed is 24 metres for light colours, and 16 metres for dark colours. For spring curved sheeting it is 20 metres for light colours and 16 metres for dark colours.
Spring Curving
Smartspan may be spring curved using purlins at a maximum spacing of 1200mm for .42mm BMT and 1400mm for .48mm BMT. The curve must have a minimum radius of 20m for .42mm and .48mm BMT. The maximum radius is 60m to allow for sufficient drainage over a crest. The side laps must be sealed wherever the roof pitch is less than the recommended minimum.
Maintenance Requirements
The performance of Smartspan 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.
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.
Ordering
Sheets are available custom cut, allowing you to minimise waste, and enhance your design options. Smartspan is available in un-painted zinc/alum, 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 directly above structural members, they must be of sufficient strength, such as over portal frames, or braced roof trusses.
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.
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 Load Conversion
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
Maximum Recommended Spans
Maximum Recommended Spans (mm)
Span Type
Roofing (BMT)
Walling (BMT)
0.42 mm
0.48 mm
0.42 mm
0.48 mm
Single Span
1350
2000
2550
2600
End Span
1800
2300
3200
3300
Internal Span
2400
3000
3500
3600
Un-stiffened Overhang
200
250
200
250
Stiffened Overhang
500
600
500
600
Roofing spans are limited, based on typical maintenance foot traffic. Walling spans are based on N1 (W28) wind loading. All spans are based on four fasteners per sheet, per support. The values are for use with steel supports with a minimum thickness of 0.75mm, G550.
Domestic Carport / Verandah Spans
Domestic Carport / Verandah Spans (mm)
Wind Classification
Base Metal Thickness
0.42 mm
0.48 mm
N1 (W28)
2500
2700
N2 (W33)
2500
2700
N3 (W41)
2100
2300
N4 (W50)
1800
2000
The values are for use with steel supports with a minimum thickness of 0.75mm, G550.
Spans
Spans (mm)
BMT
Application
Span Type
Three Fasteners
Four Fasteners
N1 (W28)
N2 (W33)
N3 (W41)
N4 (W50)
N1 (W28)
N2 (W33)
N3 (W41)
N4 (W50)
0.42 mm
Roofing
Single
1350
1350
1350
-
1350
1350
1350
1350
End
1800
1800
1700
-
1800
1800
1800
1500
Internal
2400
2000
1800
-
2400
2400
2250
1600
Walling
Single
2300
1950
1750
1500
2550
2050
1900
1750
End
3000
2300
1950
1550
3200
2650
2150
1800
Internal
3300
2500
2000
1750
3500
3100
2750
1950
0.48 mm
Roofing
Single
2000
1850
1500
-
2000
2000
1800
1700
End
2300
2100
1800
-
2300
2300
2100
1750
Internal
3000
2350
2000
-
3000
2850
2350
2000
Walling
Single
2350
2100
1850
1750
2600
2250
2050
1950
End
3000
2350
2100
1850
3300
2700
2300
2150
Internal
3400
2950
2350
1950
3600
3300
2850
2400
The values are for use with steel supports with a minimum thickness of 0.75mm, G550.
Wind Capacities
Wind Capacities (kPa)
BMT
Span Type
Limit State
Span (mm) Three Fasteners
Span (mm) Four Fasteners
1200
1500
1800
2100
2400
2700
3000
3300
3600
3900
1200
1500
1800
2100
2400
2700
3000
3300
3600
3900
0.42 mm
Single
Serviceability
2.09
1.64
1.18
0.73
0.58
0.43
-
-
-
-
2.73
2.12
1.52
0.91
0.71
0.51
-
-
-
-
Strength
4.74
4.30
3.87
3.43
3.07
2.71
-
-
-
-
6.06
5.34
4.62
3.90
3.50
3.11
-
-
-
-
End
Serviceability
2.41
1.97
1.52
1.08
0.93
0.79
0.64
0.49
0.35
-
3.36
2.67
1.97
1.27
1.09
0.91
0.73
0.55
0.36
-
Strength
3.95
3.44
2.92
2.40
2.16
1.92
1.67
1.43
1.19
-
5.27
4.51
3.76
3.00
2.74
2.48
2.22
1.96
1.70
-
Internal
Serviceability
2.82
2.24
1.67
1.09
0.98
0.87
0.75
0.64
0.53
-
4.27
3.44
2.61
1.77
1.52
1.27
1.03
0.78
0.53
-
Strength
4.96
4.09
3.22
2.35
2.13
1.91
1.69
1.47
1.25
-
5.55
4.78
4.00
3.23
2.95
2.67
2.40
2.12
1.84
-
0.48 mm
Single
Serviceability
-
1.70
1.32
0.94
0.55
0.47
0.38
0.30
-
-
-
2.20
1.70
1.20
0.70
0.57
0.43
0.30
-
-
Strength
-
4.75
4.21
3.67
3.13
2.74
2.34
1.95
-
-
-
6.10
5.53
4.95
4.38
3.86
3.33
2.81
-
-
End
Serviceability
-
2.05
1.67
1.29
0.91
0.77
0.63
0.48
0.34
0.20
-
2.91
2.31
1.72
1.12
0.95
0.78
0.61
0.44
0.27
Strength
-
4.01
3.48
2.96
2.44
2.13
1.83
1.52
1.22
0.91
-
5.10
4.44
3.78
3.12
2.78
2.45
2.12
1.79
1.46
Internal
Serviceability
-
2.30
1.94
1.57
1.21
1.06
0.91
0.77
0.62
0.47
-
3.57
2.90
2.22
1.55
1.34
1.14
0.93
0.73
0.53
Strength
-
4.33
3.72
3.11
2.49
2.18
1.87
1.56
1.24
0.93
-
5.67
4.96
4.26
3.55
3.15
2.74
2.33
1.92
1.51
The values are for use with steel supports with a minimum thickness of 0.75mm, 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
2°
86
72
64
51
43
37
32
28
5°
137
114
102
82
68
58
51
45
7.5°
168
140
126
100
84
72
63
56
10°
194
162
145
116
97
83
73
64
15°
239
199
179
143
119
102
89
79
22°
294
245
220
176
147
126
110
98
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.
