Corrugate

Standard Colours

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

Black
Minimum pitch
Rib type
Low
Ribs per sheet
11.5
Width
755mm cover
851mm sheet
Suitable for
Residential
Light commercial
Commercial
Manufactured in
Whangarei
Auckland
Hamilton
Wellington
Christchurch
Dunedin
Invercargill
Terms & Conditions

Corrugate Performance


Corrugate is a firm favourite with Kiwis because of its truly classic look that is great on all different styles of building. Used for both roofing and cladding, you’ll never go wrong with classic Corrugate.

Cover (mm)
Sheet Width (mm)
Minimum Pitch
755
Sheet Width (mm)
810
Minimum Pitch
8º (approx. 1:7)

All dimensions given are nominal

Sheet Tolerances
Sheet width: ±5mm
Sheet width for aluminium +0, -15. If sheet cover widths are critical, advise Dimond at time of order.
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 Options Thickness (BMT)
Steel 0.40mm
Steel 0.55mm
Aluminium 0.7mm
Aluminium 0.9mm
Duraclad 1.7mm total
Nominal weight / lineal metre (kg/m) options
Steel 0.40mm
3.17
Steel 0.55mm
4.27
Aluminium 0.7mm
1.78
Aluminium 0.9mm
2.28
Duraclad 1.7mm total
2.21
Drape curved roof - min. radius (m)
Steel 0.40mm
12
Steel 0.55mm
10
Aluminium 0.7mm
12
Aluminium 0.9mm
10
Duraclad 1.7mm total
8
Purlin spacings for drape curved roof (mm) (1)
Steel 0.40mm
800
Steel 0.55mm
110
Aluminium 0.7mm
800
Aluminium 0.9mm
1100
Duraclad 1.7mm total
900
Machine crimp curved - roof min. radius (mm)
Steel 0.40mm
450
Steel 0.55mm
450
Aluminium 0.7mm
450
Aluminium 0.9mm
450
Duraclad 1.7mm total
n/a
Unsupported overhang (2)
Steel 0.40mm
100
Steel 0.55mm
150
Aluminium 0.7mm
75
Aluminium 0.9mm
150
Duraclad 1.7mm total
100

(1) Recommended maximum purlin spacing at minimum radius

(2) Based on 1.1kN point load support, but not intended for roof access.

n/a – not available

Roll-forming facilities at: Whangarei, Auckland, Hamilton, Wellington, Christchurch, Dunedin, Invercargill


Roll-curving facilities at: Hamilton, Christchurch, Dunedin, Invercargill


Manufacturing location for Duraclad:
Auckland


Sheet lengths:
Corrugate 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.

Corrugate Limit State Load / Span Capacity

(span in mm, distributed serviceability loads in kPa)

G550 Steel 0.40mm
Unrestricted Access / Roof
Restricted Access / Roof
Non-Access / Roof or Wall
Unrestricted Access / Roof
End Span
Internal Span
Serviceability
End Span
Internal Span
Serviceability
Restricted Access / Roof
End Span
400
500
700
800
Internal Span
600
800
1000
1200
Serviceability
4.0
3.2
2.5
2.0
Non-Access / Roof or Wall
End Span
900
1000
Internal Span
1400
1500
Serviceability
1.6
1.4
G550 Steel 0.55mm
Unrestricted Access / Roof
Restricted Access / Roof
Non-Access / Roof or Wall
Unrestricted Access / Roof
End Span
Internal Span
Serviceability
End Span
600
Internal Span
900
Serviceability
4.4
Restricted Access / Roof
End Span
600
700
900
1000
Internal Span
1000
1100
1300
1500
Serviceability
4.0
3.7
3.2
2.8
Non-Access / Roof or Wall
End Span
1100
1300
1200
Internal Span
1600
1800
1900
Serviceability
2.6
2.2
2.0
5052 H36 Aluminium 0.70mm
Unrestricted Access / Roof
Restricted Access / Roof
Non-Access / Roof or Wall
Unrestricted Access / Roof
End Span
Internal Span
Serviceability
End Span
Internal Span
Serviceability
Restricted Access / Roof
End Span
500
Internal Span
800
Serviceability
1.4
Non-Access / Roof or Wall
End Span
600
800
1000
Internal Span
900
1200
1500
Serviceability
1.3
1.1
0.8
5052 H36 Aluminium 0.90mm
Unrestricted Access / Roof
Restricted Access / Roof
Non-Access / Roof or Wall
Unrestricted Access / Roof
End Span
Internal Span
Serviceability
End Span
Internal Span
Serviceability
Restricted Access / Roof
End Span
600
800
Internal Span
900
1800
Serviceability
3.2
2.2
Non-Access / Roof or Wall
End Span
900
1000
1200
Internal Span
1300
1500
1800
Serviceability
2.0
1.7
1.3
Duraclad 1.7mm (Note 4)
Unrestricted Access / Roof
Restricted Access / Roof
Non-Access / Roof or Wall
Unrestricted Access / Roof
End Span
Internal Span
Serviceability
Ultimate
End Span
Internal Span
Serviceability
Ultimate
N/R
Restricted Access / Roof
End Span
600
Internal Span
900
Serviceability
-
Ultimate
4.5
Non-Access / Roof or Wall
End Span
700
800
900
Internal Span
1000
1200
1400
Serviceability
-
-
-
Ultimate
4.1
2.3
1.6
Notes
  1. In any category, spans above the maximum shown should not be used. Category 1 and 2 maximum spans are based on static point load testing as a guide, and further limited by practical experience of roof performance under dynamic foot traffic loads. Category 3 maximum spans are limited as a guide to achieving satisfactory appearance for wall cladding.
  2. Loads given are based on 5 screw fasteners/sheet/purlin.
  3. Loads given are limited to a maximum of 4.5 kPa. If design requirements exceed this limit, contact Dimond for specific advice.
  4. Duraclad
    – Serviceability Limit State loads are not applicable to the Duraclad material, as it does not experience permanent deformation.
    – System must include Safety Mesh if intended for use as a Restricted-Access roof. Refer Section 2.2.1.8 of Technical Manual.
  5. N/R = not recommended.
  6. End span capacities given in this table are based on the end span being 2/3 of the internal span.
  7. Design Criteria for Limit State Capacities
    1. Serviceability Limit State
      No deflection or permanent distortion that would cause unacceptable appearance, side lap leakage or water ponding, due to foot traffic point loads, inward or outward wind loads or snow loads.
    2. Ultimate Limit State
      No pull through of fixings or fastener withdrawal resulting in sheet detachment due to wind up-llift (outward) loads.
  8. System Design
    The span capacity of Corrugate is determined from the Corrugate Limit State Load/Span Capacity Chart using the section of the chart appropriate to the grade and type of material, and to the category of serviceability selected from the three categories below. Serviceability loads have been derived by test to the NZMRM testing procedures. To obtain an ultimate limit state load we recommend factoring the serviceability load up by 1.4 in-line with NZMRM guidelines.
    The capacities given do not apply for cyclone wind conditions.

    Serviceability Requirements
    While these categories are given for design guidance to meet the serviceability limit state criteria, foot traffic point load damage may still occur if there is careless placement of these point loads.

    1. Unrestricted-access roof

    Expect regular foot traffic to access the roof for maintenance work and able to walk anywhere on the roof. No congregation of foot traffic expected.
    2. Restricted-access roof

    Expect occasional foot traffic educated to walk only on the purlin lines, in the profile pans, or carefully across two profile ribs.
    Walkways installed where regular traffic is expected, and “Restricted Access” signs placed at access points.
    3. Non-access roof or wall

    Walls or roofs where no foot traffic access is possible or permitted. If necessary, “No Roof Access” signs used.

  9. Wind Pressure Guide
    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.

Corrugate Fastener Design



Corrugate should be screw fixed to either timber or steel purlins. The use of the appropriate length of 12g screw, or when fixing
aluminium roof or wall cladding to timber, the use of a 12g or 14g Alutite, on both a non cavity and cavity system will ensure
failure by screw pull out will not occur under loads within the scope of the Limit State Load / Span Capacity Chart.

Purlin or frame material
Roofing Rib - Steel based sheet
Roofing Rib - Aluminium based sheet
Wall Cladding Pan - Steel based sheet
Wall Cladding Pan - Aluminium based sheet
Timber
Roofing Rib - Steel based sheet
T17 x 12 - 11 x 50 / M6 x 50 HG-Z4 Roofzip
Roofing Rib - Aluminium based sheet
14g x 55mm Alutite with a 12mm dia. clearance hole, alum. profiled washer & 36mm dia. EPDM seal
Wall Cladding Pan - Steel based sheet
Non cavity M6 x 50mmHG-Z4 Roofzip
Cavity M6 x 50mmHG-Z4 Roofzip
Wall Cladding Pan - Aluminium based sheet
Non Cavity 12g x 35mm Alutite
Cavity 14g x 55mm Alutite
Steel up to 1.5mm thick
Roofing Rib - Steel based sheet
M6 x 50 HG-Z4 Roofzip or Tek 12g - 14 x 35 Class 4
Roofing Rib - Aluminium based sheet
Stainless steel grade 304 14g x 50mm with a 12mm dia. clearance hole, alum. profiled washer & 36mm dia. EPDM seal
Wall Cladding Pan - Steel based sheet
Non Cavity Tek 12g - 14x 20 Class 4
Cavity Tek 12g - 14x 35 Class 4
Wall Cladding Pan - Aluminium based sheet
Non Cavity - Stainless steel grade 304 14g x 20mm with a 15mm dia bonded washer, through an 10mm dia. clearance hole
Cavity - Stainless steel grade 304 14g x 50mm with a 15mm dia. bonded washer, through an 10mm dia. clearance hole
Steel 1.5mm to 4.5mm thick
Roofing Rib - Steel based sheet
Tek 12g - 14 x 35 Class 4
Roofing Rib - Aluminium based sheet
Stainless steel grade 304 14g x 50mm with a 12mm dia. clearance hole, alum. profiled washer & 36mm dia. EPDM seal
Wall Cladding Pan - Steel based sheet
Non Cavity Tek 12g - 14x 20 Class 4
Cavity Tek 12g - 14x 35 Class 4
Wall Cladding Pan - Aluminium based sheet
Non Cavity - Stainless steel grade 304 14g x 20mm with a 15mm dia. bonded washer, through an 10mm dia. clearance hole
Cavity - Stainless steel grade 304 14g x 50mm with a 15mm dia. bonded washer, through an 10mm dia. clearance hole

*If sarking or insulation is used over the purlins or for wall cladding fixing onto a cavity batten, into the stud, the screw length will need to be increased.

For screw size range and fastener / washer assembly refer Section 2.2.3.1 of Technical Manual.

The Limit State Load / Span Capacity Chart is based on 5 screw fasteners/sheet/purlin without the use of load spreading washers (except for Duraclad material, which must be fitted with profiled metal washers and 36mm EPDM seals).

Profiled metal washers are recommended for use:

  1. On end spans, or large internal spans where the Ultimate Limit State distributed load is limiting. Contact Dimond for specific advice in these design cases.
  2. When required to enable the fixing system to accommodate the thermal movement of long sheets – see Section 2.1.3.4 Thermal Movement of Technical Manual..
  3. Wherever the designer wishes to ensure the risk of fastener over-tightening will not cause dishing of the crest of the profile rib.

Use in serviceability categories (1) or (2) can allow the reduction of fasteners to 3 screw fasteners/sheet/purlin.

If this is done, the distributed load capacities given in the chart should be reduced using a multiplying factor of 0.6.

Long spans may require the specification and use of side lap stitching screws – see Section 2.3.2C Installation Information: Layout and Fastening of Technical Manual



Design Example



Restricted access roof, 0.55mm G550 steel Corrugate has a maximum end span of 1000mm and a maximum internal span of

1500mm. The following distributed load capacities apply.

5fasteners/sheet
3 fastener/sheet
End Span
5fasteners/sheet
1000mm
3 fastener/sheet
1000mm
Internal Span
5fasteners/sheet
1500mm
3 fastener/sheet
1500mm
Serviceability
5fasteners/sheet
2.8kPa
3 fastener/sheet
1.7kPa

Fastener Layout Options

Terms & Conditions
Technical Manual
All Dimond Roofing CAD details can be found on EBOSS

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