C-Tile
April 23, 2019
Corrugated Sheeting
April 23, 2019

Widespan Sheeting

Widespan is a roofing and cladding profile designed to provide an economic alternative to deeper box rib profiles without losing the aesthetic appeal of a square fluted profile. The trapezoidal widespan profile offers greater spans and lower roof slopes than Corrugated sheeting but provides the same covering width.

Widespan can be factory cranked, curved and bullnosed to various radii depending on customers’ requirements.

Structural Guidelines

Widespan roof sheets are available in a wide range of materials displaying various structural properties. It should be noted that the load span characteristics are only to be used as a broad guideline.

Purlin spacing is also dependant on other factors such as:

  • Prevailing winds in a certain area,
  • Snow during winter periods,
  • The presence of dust and other particles in industrial areas and the type of structure that is being erected, etc.

We therefore recommend that a qualified engineer be consulted to determine the purlin spacing for a specific application.

The structural properties of the various material options can be summarised as follows:

* Recommended maximum purlin spacing (metres) - Widespan

Thickness Steel Grade0.40mm
ISQ550
0.47mm
G550 ISQ550
0.50mm
ISQ550 G550
0.55mm
G550
0.58mm
ISQ300
0.80mm
ISQ230
Roof – single span0.901.201.201.201.201.60
Roof – double span1.191.401.401.401.401.90
Cantilever – roof0.200.400.400.450.450.55
Vertical cladding1.601.601.601.601.601.60
Weight per metre2.974 kg3.495 kg3.718 kg4.090 kg4.313 kg5.949 kg
Weight per m23.801 kg4.191 kg4.744 kg5.030 kg5.507 kg7.608 kg

Table indicates standard stock available.

Download Widespan product brochure

Available Dimensions

Widespan sheeting is available in standard lengths of 1.5m to 15m although lengths of up to 20m are available on request. The permissible length tolerance for the standard-length range will be -0 +5 mm.

Sheets outside these parameters are available on request and might be subject to special pricing arrangements. The maximum height which can be transported is 4.3 m. This factor should be considered when bullnoses and curves are designed.

Roof pitch

When using Widespan, the recommended minimum pitch is 10.0° for roof slopes in excess of 30m and 7.5° for slopes less than 30m. When Widespan roof sheets are end-lapped, the roof pitch should be considered. The minimum end laps for roofs pitches in excess of 15° is 15mm and for other roofs a minimum of 250mm is recommended. End laps for sheeting should be at least 100mm. It is recommended that end and side laps on low pitched roofs be sealed to ensure water-tightness.

Installation procedure

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

  • Number of sheets= Length of building ÷ 0.762 m (Cover width of sheet)

Roof sheets must be laid with the narrow flute of one corrugation side lap uppermost and should be fixed through the crests of alternate flutes to purlins using 57mm Top Speed or Tex screws into steel purlins and 90mm Tex or Top speed screws in the case of timber roofs. All fasteners should incorporate 19mm dia bonded washers. For vertical wall cladding (side cladding) it is recommended that the broad fluted be fixed externally with the main and side lap fasteners in the web of the flutes. Side cladding can be fixed using 25mm Tex or Top speed screws. All fasteners should incorporate 19mm dia bonded washers.

In order to qualify for a guarantee on Zincalume®, Colorbond®, Colorplus® and ZincAL® sheets the following fasteners supplied by Buildex Industries should be used: Metaltex Climaseal 3 for steel purlins and Timbertex Zacs 4 for timber purlins. The use of these fasteners will dramatically increase the lifespan of the roof sheeting as corrosion caused by fasteners is avoided.

Specification

Specification (*refer to table indicated below)

(*Thickness & material quality) Clotan Steel Widespan (with/without) integral stiffening rib (Chromadek®/Colorbond®/Colorplus®) steel roof sheeting and accessories fixed to (timber/steel) purlins or rails with a (*refer to table) spacing. All sheeting is to be clearly marked on the reverse side at one-metre intervals, indicating thickness, material quality and coating thickness.

(*Thickness & material quality) Clotan Steel Widespan (with/without) integral stiffening rib (coating) steel sheeting and accessories with (Chromadek®/Colorbond®/Colorplus®) finish on one side and protective primer coating on the reverse side fixed to (timber/steel) purlins or rails with a (*refer to table) spacing. All sheeting is to be clearly marked on the reversed side at one-metre intervals, indicating thickness, material quality, coating thickness and paint system. View our pre-painted color options.

Thickness & Material QualityCoatingAvailable Paint System
0.40 mm – ISQ550Z100 - Z150 Galvanised*
0.47 mm - ISQ550Z150 - Z275 Galvanised*
0.50 mm - ISQ550Z150 - Z275 Galvanised*Chromadek®
Chromadek Ultim®
0.58 mm - ISQ300Z200 - Z275 GalvanisedChromadek®
Chromadek Ultim®
0.80 mm - ISQ230Z200 - Z275 GalvanisedChromadek®
Chromadek Ultim®
0.47 mm - G550AZ150 ZincalumeColorbond®
0.55 mm - G550AZ150 ZincalumeColorbond®
0.50 mm - G550AZ100, AZ150, AZ200 ZincAL®ColorPlus®
0.55 mm - G550AZ100, AZ150, AZ200 ZincAL®ColorPlus®

Serving customers in the follow countries:

Specification

Specification (*refer to table indicated below)

(*1 Thickness and material quality) Clotan Steel 10½ Corrugated (Chromadek®/Colorbond®/Colorplus®) steel roof sheeting and accessories fixed to (timber/steel) purlins or rails with a (*refer to table) spacing. All sheeting is to be clearly marked on the reverse side at one-metre intervals, indicating thickness, material quality and coating thickness.

(*Thickness and material quality) Clotan Steel 10½ Corrugated (*zinc coating) steel roof sheeting and accessories with (Chromadek®/Colorbond®/Colorplus®) finish on one side and protective primer coating on the reverse side fixed to (timber/steel) purlins or rails with a (*refer to table) spacing. All sheeting is to be clearly marked on the reverse side at one-metre intervals, indicating thickness, material quality, coating thickness and paint system. View our pre-painted color options.

Thickness & Material QualityCoatingAvailable Paint System
0.40 mm – ISQ550Z100 - Z150 Galvanised*
0.47 mm - ISQ550Z150 - Z275 Galvanised*
0.50 mm - ISQ550Z150 - Z275 Galvanised*Chromadek®
Chromadek Ultim®
0.58 mm - ISQ300Z200 - Z275 GalvanisedChromadek®
Chromadek Ultim®
0.80 mm - ISQ230Z200 - Z275 GalvanisedChromadek®
Chromadek Ultim®
0.47 mm - G550AZ150 ZincalumeColorbond®
0.55 mm - G550AZ150 ZincalumeColorbond®
0.50 mm - G550AZ100, AZ150, AZ200 ZincAL®ColorPlus®
0.55 mm - G550AZ100, AZ150, AZ200 ZincAL®ColorPlus®

Serving customers in the follow countries:

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