Developed by some
of New Zealand’s roofing professionals, Maxispan® is a strong and aesthetically
pleasing high rib roofing and cladding profile.
The profile incorporates a number of innovative practical design features and provides significant advantages to building designers. The convex ribs provide strength and water run-off away from the fixings. Twin capillary breaks on the lap purpose designed leg provides support to the under-lap.
Installers feet fit neatly in the pan avoiding damage to the ribs. Can be “reverse run” and the swage removed for wall cladding application. Lap can be altered in the reverse run process to ensure improved aesthetics and water tightness (.55 BMT recommended).
High volume water carrying capacity. Wide cover reduces installation time. Superior spanning at low pitch.
Applications: For industrial and commercial roofing and cladding projects where both high spanning and low pitch is required; Drape curving; Carports; Rural and lifestyle roofing and cladding.
Roofing Industries Maxispan is available in a wide range of metal substrates and surface finishes including galvanised, Zincalume, Aluminium-zinc-magnesium, aluminium, stainless steel, Colorcote and Colorsteel (.40mm BMT and .55mm and .75mm BMT) or aluminium (.70mm BMT and .90mm BMT).
Available in standard 910mm effective cover. Maxispan is also available in glass reinforced translucent roofing. A full range of matching accessories is available including ridging, flashings, underlays, fasteners and rainwater systems.
Scope of use
Maxispan® is a wall and
roof cladding with a high rib-height asymmetric trapezoidal roofing profile for
non-specifically designed timber framed buildings designed and constructed in accordance
with B1/AS1, NZS3604 and E2/AS1, non-specifically designed steel framed
buildings to NASH 3405, and specifically designed buildings in accordance with
B1/VM1 and AS/NZS 1170.
used as a roof cladding:
- Maxispan® may be used with a minimum roof gradient of 3 degrees
When used as a wall
- Maxispan® may be fixed horizontally over a nominal 20mm drained cavity
where the Risk Score is 0-20.
- Maxispan® may be fixed vertically over a nominal 20mm drained cavity with
“ventilated” battens where the Risk Score is 0-20.
- Specific design is
required where the Risk Score is greater than 20,
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3(a), B1.3.3(b), B1.3.3(c), B1.3.3(f), B1.3.3(g), B1.3.3(h)
- Clause B2 Durability: Performance B2.3.1(b), B2.3.2
- Clause C3 Fire affecting areas beyond the fire source: Performance C3.7, C3.7(a)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
The product will,
when installed using the details in the Ribline®
Profile Technical Summary, meet the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1;
B1.3.2; B1.3.3 for the relevant physical conditions of a) self-weight, b)
imposed gravity loads arising from use, (c) temperature, (f) earthquake, g (snow)
and h) wind; B1.3.4
- Clause B2 Durability: Performance B2.3.1(b);
- Clause C3 Fire Affecting Areas Beyond the
Fire Source: Performance C3.7 Maxispan® is non-combustible and contributes to
- Clause E2 External moisture: Performance
E2.3.1, E2.3.2 Maxispan® complies
with E2/AS1 if the roof gradient is 3 degrees or greater, and complies with
E2/AS1 as a wall cladding when fixed horizontally over a nominal 20mm drained cavity where the Risk Score is 0-20
- F2 Hazardous Building Material: Performance
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
Solution for External Moisture E2/AS1
Method for Structure B1/VM1
Metal Roof and Wall Cladding Code of Practice Version 2.2/2012 (MRM Code ofPractice)
for wind loads to AS4040.2: 1992 Methods of testing sheet roof and wall
cladding Resistance to wind pressures for non-cyclone regions.
The product has and can make available the following additional evidence to support the above statements:
||New Zealand Metal Roofing Manufacturers Association Inc (NZMRM)
Code of Practice
For most roof
installations the purlin spacing will be limited by the trafficable limitations
of the profile or the structural design, refer to Profile Technical Summary
For fixings and
fixing patterns, refer to the Roofing Industries Maxispan® Profile Technical Summary,
which is to be read in connection with E2/AS1, and the NZ Metal Roof and Wall
Cladding Code of Practice. E2/AS1 states that the use of the manufacturers
information may provide a more optimum spacing of fixings, and this is
recommended by Roofing Industries. For purlin sizes, spacing and fixing, refer
to NZS 3604 for Timber Framed buildings and NASH 3405 for Steel Framed Houses.
Where a building is
outside of the scope of E2/AS1 specific design is required, and the designer
must calculate the design wind load for the roofing and cladding in accordance
with generally acceptable practice, by reference to AS/NZS 1170.2 2011, and/or
NZS 3604:2011 as appropriate.
For a fuller
explanation of this refer to the NZ Metal Roof and Wall Cladding Code of
Practice. This result should be read in referenced to Roofing Industries
Profile Technical Summary the Wind Load Span Design Graphs.
The substrate and
coating system must be as recommended by Colorsteel or Colorcote for the
environmental conditions at the intended building location, and as specified in
E2/AS1 Table 20.
contact with Maxispan® must be compatible as specified in E2/AS1 Table 21.Maintenance
maintenance will extend the life of Multirib® and associated accessories.
Regular maintenance will extend the life of Maxispan and associated
Maintenance guides are available from Roofing
Industries or can be downloaded from either NZ Steel or Pacific Coilcoaters
Guide to regular maintenance -
- Inspect the roof,
including fasteners, and repair any damage every 6 months.
- Wash areas not receiving regular rain washing with fresh water
at least every 3 – 6 months.
- Remove debris from gutters every 3 - 6 months.
- Remove any noticeable buildup of salt deposits and/or other
contaminants when identified.
- Please consult with
your local distributor when considering over painting to ensure correct
procedures are undertaken.
Colorsteel and Colorcote prepainted steel has been extensively tested and proven in some of New Zealand's most extreme UV, wind, rain, snow and ice environments.
All Colorsteel and Colorcote is factory painted at either NZ Steel, Glenbrook or Pacific Coilcoaters, Penrose. Both plants operate within strict environmental controls.
Environmental category literature available by request or the roof.co.nz website, or by contacting Roofing Industries, technical helpline 0800 844 822
||New Zealand Made