Dimondclad Rib 50

Standard Colours

For Designer, Metallic and Gloss colours, download the ColorCote® special colours brochure.

Ribs per sheet
779mm Cover
810mm Sheet
Manufactured in
Suitable for
Light Commercial
Products may not be available outside of its manufacturing location, and freight and packing charges applied may vary depending on the location of manufacture and delivery point. To confirm availability and costs please contact Dimond prior to ordering.

Dimondclad Rib 50 Performance

If versatility is what you are after then Dimondclad is the perfect cladding solution. Dimondclad's clean, efficient lines and well concealed laps are excellent for both exterior and interior cladding. Dimondclad Rib 50 features wide ribs with narrow pans for the opposite look to Dimondclad Rib 20.

Cover (mm)
Sheet Width (mm)
Minimum Pitch
Sheet Width (mm)
Minimum Pitch
Wall cladding only

All dimensions given are nominal

Sheet Tolerances
Sheet width: ±5mm
Sheet length: +10mm, –0mm. For horizontal wall cladding where notified at time of order of intended use, tighter tolerances can be achieved +3mm, –0mm.

Material Option Thickness (BMT)
Steel 0.40mm
Aluminium 0.70mm
Aluminium 0.90mm
Nominal weight/lineal metre (kg/m)
Steel 0.40mm
Aluminium 0.70mm
Aluminium 0.90mm
Unsupported overhang (1) (mm)
Steel 0.40mm
Aluminium 0.70mm
Aluminium 0.90mm

(1) Not intended to support point loads.

Roll-forming facility at: Hamilton

Sheet lengths: Dimondclad Rib 50 is custom run to order.

Where long sheets are used consideration must be given to:

  • Special transportation licences for sheet lengths over 25m
  • Site access for special lifting equipment
  • Fixing techniques to accommodate thermal expansion.

Refer Section of the Technical Manual.

Load Spans

Dimondclad Rib 50 Detailed Design

Design Criteria for Limit State Capacities.

  1. Serviceability Limit State
    No deflection or permanent distortion that would cause unacceptable appearance or side lap leakage due to inward or outward wind loads.
  2. Ultimate Limit State
    No pull through of fixings or fastener withdrawal resulting in sheet detachment due to wind up-lift (outward) loads.

System Design

The span capacity of Dimondclad Rib 50 is determined by the serviceability requirement for acceptable appearance and should not exceed 1400mm.

The ultimate wind load should not exceed 3 kPa.

The Dimondclad Rib 50 profile is not intended for use as roofing products, and must not be used in situations where foot traffic point loads can be applied.

Fastener Design

Dimondclad Rib 50 Fastener Design

Dimondclad Rib 50 should be screw fixed over cavity battens to either timber or steel framing where a high level of appearance is required. Nail fixing to timber may be used in an interior situation not exposed to the weather. The use of the appropriate length of 12g screw will ensure failure by fastener pull out will not occur under the load limitation given.

Wall Cladding Pan Fixed Screw Length* (mm)
Wall Cladding Pan Fixed Designation
Wall Cladding Pan Fixed Screw Length* (mm)
Wall Cladding Pan Fixed Designation
Roofzip M6 x 50mm
Wall Cladding Pan Fixed Screw Length* (mm)
Wall Cladding Pan Fixed Designation
Tek - 12 - 14 x 20

*If sarking or insulation is used over the framing, screw length will need to be increased.

For screw size range and fastener / washer assembly refer Section of Technical Manual.

The Span Capability and Sheet Appearance is based on fasteners at 260mm maximum spacing across the sheet without the use of load spreading washers.

Spans greater than 800mm will require the specification and use of side lap stitching fasteners – see Section 2.3.2C Installation Information: Layout and Fastening of Technical Manual, for fastener type.

As a guide for non-specific design the following S.L.S. design loads in accordance with the MRM Roofing Code of Practice can be used for buildings less than 10m high, otherwise AS/NZS 1170.2 should be used

Low wind zone = 0.68kPa, Medium wind zone = 0.93kPa, High wind zone = 1.32kPa, Very high wind zone = 1.72kPa and Extra high wind zone = 2.09kPa.

Dimondclad Rib 50 Fastener Layout Options

Terms & Conditions

Relevant Product CAD Details

Below you will find all of the relevant product CAD technical details in .dwg, .pdf & .rvt format.

If you have any questions regarding the details below please contact one of our technical team on 0800 ROOFSPEC.

Product Technical Statement

Product Technical Statement

To help you get through the building consent process as quickly as possible, we have developed the Product Technical Statement (PTS) downloads to make it quick and easy for both Architects and Home Owners to access the documentation required.

The PTS downloads hold all of the information that the council requires for a building consent where Dimond product is specified.

Download Product Technical StatementLast updated May 2021
Technical Manual
Product Data Sheet

Product Data Sheet

For specific design by profile please refer to the Technical Manual Section 2.1.4 or download the data sheet below

Download Data SheetLast updated May 2021

Product Brochure

Need a brochure for one of our roofing profiles? Here you can download one for each of our profiles with the basic information and details you need during the decision process.

Download Product BrochureLast updated August 2021