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Widespan Roof Sheeting

Staalbeer uses an inhouse delivery fleet consisting of 48 trucks in various load formats to deliver your product directly to site

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Widespan is a roofing and cladding profile designed as an economic alternative to IBR. Widespan offers greater spans and lower roof slopes than Corrugated sheeting with the same covering width. Widespan can be cranked, curved and bullnosed to customer specifications.

Widespan is manufactured with a stiffening rib in the broad flute in order to minimise waves in the broad flute of the profile. If sheets without the stiffening rib is specified no claims for waving (oil canning) will be entertained.

Structural capabilities

Load span characteristics are to be used as a guideline only as purlin spacing also depends on other factors e.g. the wind conditions in a certain area, the type of structure or load bearing elements such as solar geysers. An engineer should determine the purlin spacing of a structure after considering the complete design. Approximate spanning capabilities of Widespan is as follows:

Widespan (0.762 mm) Approximate Purlin Spacing – (m)
Thickness & Coating
0.50mm Galvanised
0.50mm Galvanised
0.50mm Chromadek
0.58mm Galvanised
0.58mm Chromadek
Steel GradeFull HardIQ550ISQ550ISQ300ISQ300
Minimum Bullnose Radius450 mm450 mm450 mm300 mm300 mm
Coating weightZ150Z275Z200Z275Z200
Thickness tolerance+-0.02 mm+-0.02 mm+-0.02 mm+-0.02 mm+-0.02 mm
Weight per metre3.72 kg / m3.72 kg / m3.72 kg / m4.18 kg / m4.18 kg / m
Weight per sq metre4.882 kg / m24.882 kg / m24.882 kg / m25.486 kg / m25.486 kg / m2
Roof – single span1.
Roof – double span1.501.501.501.601.60
Cantilever – roof0.400.400.400.500.50
Wall – single span1.801.801.801.901.90
Wall – double span2.
Cantilever – wall0.750.750.750.90.9
Approximate life span (years)
Rural area>10>20>20>20>20
Industrial area5 – 1010 – 2010 – 2010 – 2010 – 20

Available lengths

Widespan is available in lengths of up to 14 metres with a length tolerance of -0 +5 mm. Sheets lengths up to 15.8m are available on enquiry.

When bullnoses and curves are designed a maximum permissible transport height of 4.3 metres is applicable.

Roof slope

When using Widespan, the recommended minimum pitch for roof slopes in excess of 15.8m is 10º and for slopes less than 15.8m is 7.5º.

The minimum end laps for roofs pitches >15º is at least 150 mm and 250 mm for other roofs. Side cladding end laps should be at least 100 mm.

It is recommended that end laps on roofs

Fixing procedure

The required number of Widespan sheets can be calculated as follows:

Length of building plus gable overhangs – (minus) 50 mm

Number of sheets =                               0.762 m (Cover width of sheet)

The result of the calculation is then rounded up to the next sheet

Widespan must be fixed with one corrugation side lap with the narrow flute uppermost and fastened through the crests of alternate flutes to purlins using 65 mm Tek screws into steel purlins and 90 mm Tek screws for timber roofs, each fasteners must incorporate a 19 mm bonded washer.

For side cladding broad flutes can be fixed externally with fasteners in the web of the flutes. Side cladding can be fixed using 25 mm Tek screws with a 19 mm bonded washer.

For a quick calculation 3 fasteners per sheet per purlin can be used.

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Staalbeer uses an inhouse delivery fleet consisting of 48 trucks in various load formats to deliver your poduct directly to site. Get a Quote
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