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Corrugated Sheeting

Clotan Steel are reputable Corrugated Roof Sheeting suppliers in South Africa, supplying construction companies and individuals on the African continent with quality steel building products. You can expect a professional service, affordable Corrugated Roof Sheeting prices, and a range of Corrugated Roof Sheeting in different sizes, dimensions and specifications.

Corrugated sheeting is the traditional and familiar S-Rib profile for roofing and cladding applications. It is the oldest and most commonly used roofing profile because of its easy handling and fixing properties and related strength. The S-rib is derived from sinus curve and offers very strong and structural properties.

Corrugated cover width

Clotan Steel offers two types of corrugated product options a 8.5 Corrugated and a 10.5 Corrugated. The rib height shall be 17.5mm

  • 8.5 Corrugated provides an effective cover width of 610mm
  • 10.5 Corrugated provides an effective cover width of 762mm

The Corrugated roof sheeting profile virtually eliminates oil canning and the sheeting can be factory cranked, curved and bullnosed to various radii depending on customers’ requirements.

Structural Guidelines Of Corrugated Sheeting

Corrugated 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 particular area,
  • Snow during winter periods,
  • The presence of dust and other particles in industrial areas as well as the type of structure that is being erected.

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

* Recommended maximum purlin spacing (metres) - Corrugated

Thickness Steel Grade0.40mm
ISQ550
0.47mm
G550 ISQ 550
0.50mm
ISQ500 G550
0.55mm
G550
0.58mm
ISQ300
0.80mm
ISQ230
Roof – single span0.60 0.900.900.90 0.90 1.20
Roof – double span0.80 1.101.101.20 1.20 1.50
Cantilever – roof0.150.250.250.300.300.45
Vertical cladding1.001.401.401.401.401.80
Weight per metre2.974 kg3.495 kg3.718 kg4.090 kg4.313 kg5.949 kg
Weight per m23.90 kg4.59 kg4.88 kg5.37 kg5.66 kg7.81 kg

* Table indicates standard stock available. Discuss your individual needs with our sales consultants.

Download Corrugated product brochure

Available Dimensions

Corrugated sheeting is available in standard lengths of 1.8m to 14m 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 4.3m. This factor should be considered when bullnoses and curves are designed.

Roof pitch

When using Corrugated, the recommended minimum pitch for roof slopes in excess of 15m is 10.0° and for slopes less than 15 m is 7.5°. When Corrugated roof sheets are end-lapped the roof pitch should be considered.

The minimum end laps for roofs pitches in excess of 15° is 150mm and for other roofs a minimum of 250mm is recommended. End laps for side sheeting should be at least 100mm. It is recommended that end and side laps on low pitch roofs be sealed to ensure water tightness. (available in pre-painted colour options)

Installation procedure

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

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

Roof sheets and vertical wall cladding (side cladding) must be laid with one and a half corrugation side lap and must be fixed through the crests of alternate flutes to purlins using 50 mm Top Speed or Tex screws into steel purlins and 65 mm Tex or Top Speed screws in the case of timber supports. All fasteners must incorporate 19 mm 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 life span of the roof sheeting as corrosion caused by fasteners is avoided. When Corrugated sheeting is double overlapped the covering width for 8.5 Corrugated changes to 535 mm and for 10.5 Corrugated changes to 686 mm.

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®

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®

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