For more information a
MAXISPAN USES
- Commercial and Industrial Roofing and Cladding
- Rural Roofing and Cladding
- Low pitch Residential Roofing
SCOPE
It should be noted that Maxispan is generally used on buildings of specific design and as such falls outside of E2/AS1 of the New Zealand Building Code and design is generally based around the manufacturers recommendations which are the result of design, testing and proven solutions. When fixed in accordance with E2/AS1 Maxispan complies with that document.
COVER
Available in 910mm effective cover with a profile height of 52mm
Custom cut to length subject to available transport. Lengths in excess of 30 metres may require more specialised transport. Please contact Roofing Industries Ltd.
MATERIALS
ZINCALUME STEEL: 0.40 BMT, AZ150 (150gm/m2), G550 MPa Yield Stress
0.55 BMT, AZ150 (150gm/m2), G550 MPa Yield Stress
GALVANISED STEEL: 0.40 BMT, Z450 (450gm/m2), G550 MPa Yield Stress
0.55 BMT, Z450 (450gm/m2), G550 MPa Yield Stress
PREPAINTED STEEL: Continuously coil coated over 0.40 or 0.55 mm BMT, AZ150 (150gm/ m2), G550 MPa Yield Stress Zincalume Steel, or over 0.40 or 0.55 mm BMT ZM275 (275gm/ m2), G550 MPa Yield Stress Galvanised Steel.
ALUMINIUM: Refer to Roofing Industries Ltd.
PITCH
In accordance with the New Zealand Building Code the recommended minimum pitch for Maxispan is 3 degrees.
THERMAL EXPANSION
Consideration must be given for thermal expansion of the roof profile. Once sheet lengths exceed 12 metres specific fixing requirements are necessary. Refer to "Fastener" notes.
SPAN TABLES (G550 Material)
|
Type of Span
|
Max Span (Metres)
|
Max Span (Metres)
|
| |
|
.40 BMT
|
.55 BMT
|
|
Roof
|
Intermediate
|
3.400
|
4.050
|
| |
End
|
2.450
|
3.250
|
| |
|
|
|
|
Walls
|
Intermediate
|
4.000
|
4.200
|
| |
End
|
3.100
|
3.700
|
- Single spans should be limited to 80% of the above end spans.
- The above span tables are for restricted access category roofs where foot traffic should be in the pan of the profile, or on the rib within 300mm of any purlin.
- In high traffic areas or areas supporting items such as air-conditioning units purlin spacing should be reduced, and or the use of 0.55 gauge material is recommended.
- For roofs with a height in excess of 10 metres above ground refer to the manufacturer.
- The above spans are for Auckland, Waikato, and Bay of Plenty areas but exclude localised high wind areas. For other regions and high wind areas please contact Roofing Industries Ltd.
WEIGHT AND COVERAGE (m2/tonne)
|
Material
|
. 40 BMT
|
.55 BMT
|
|
Zincalume
|
Plain
|
224
|
166
|
| |
Painted
|
221
|
150
|
| |
|
|
|
|
Galvanised
|
Plain
|
205
|
154
|
| |
Painted
|
209
|
157
|
SITE STORAGE
Packs of Maxispan sheets should be stored off the ground. If packs are wet and not being used immediately, open them and separate the sheets to allow them to dry.
If dry, packs may be loosely covered with a watertight tarpaulin, allowing air to circulate.
INSTALLATION AND HANDLING
To avoid damage to the Maxispan sheeting;
|
ALWAYS
|
NEVER
|
- Wear soft-soled shoes to prevent damage to sheets.
|
- Drag, slide or handle sheets roughly or carelessly.
|
- Walk along purlin line whenever possible.
|
- Use metal grinding blades; use "snips" or "nibblers" instead.
|
- Use clean and grit free equipment when handling sheets
|
|
- Sweep drill filings and other debris from roof area daily.
|
|
- Stop end sheets under flashings and ridges.
|
|
- Turn down ends of all sheets when roof pitches are low
|
|
- Ensure the sheet is lapped with the capillary groove on the edge of the sheet visible.
|
|
- Reference should be made to the "NZ Metal Roofing & Wall Cladding Code of Practice". For further recommendations please contact Roofing Industries Ltd.
- Sliding fixings on long sheets require oversize holes to be drilled.
- When fixing translucent sheeting a mid span support should be used in most circumstances.
- Translucent sheeting is generally fixed over adjoining steel sheets.
- Foam filler strip to be used for bird and weatherproofing at the ends of sheets.
- All roofing and cladding should be installed in accordance with the New Zealand Building Code and generally require the use of underlay.
- Side lap stitching is recommended for wide spans.
FASTENERS
Maxispan sheets should be fastened at every crest at every purlin. It is recommended that Maxispan be fixed using profiled metal washers and appropriate EPDM or sliding washers as follows;
From the ridge down 12.000 metres
Solid fix using profiled metal washer, EPDM washer with 14 x 90 Steeltek Class 4 screws with neoprene washers or 14 x 100 Woodtek Class 4 screws with neoprene washers.
Remainder of sheet
Drill oversize hole and use profiled metal washers, sliding teflon washers with 14 x 90 Steeltek Class 4 screws with neoprene washers or 14 x 100 woodtek Class 4
screws with neoprene washers.
Wall sheets may be pan fixed using 12 x 40 Timbertek Class 4 screws with neoprene
washers or 12 x 20 Steeltek Class 4 screws with neoprene washers as appropriate.
ACCESSORIES
A full range of matching accessories is available. This includes ridging, flashings, underlays, foam filler strip, fasteners as well as translucent sheeting for roof lighting.
WARRANTIES
When used in accordance with the appropriate recommendation the products comply with the statutory requirements of the New Zealand Building Code. When warranties in excess of this are required, please contact the manufacturer.
MAINTENANCE AND PRODUCT SELECTION
Reference should be made to the manufacturer for the appropriate finish for a particular environment. Zincalume based products should not be used in some special environments including intensive animal shelters. Areas unwashed by rain should be washed twice yearly. In severe and very severe environments post painting of galvanised and zincalume material is recommended.
|
|
Environmental usage guide for New Zealand
|
|
|
ISO
|
Cat 1 to 2
|
Cat 2to 3
|
Cat 4
|
Cat 5
|
|
Catergory
|
Mild &
|
Moderate Marine
|
Severe Marine
|
Very Severe Marine
|
|
|
Moderate
|
Moderate Industrial
|
Severe Industrial
|
Very Severe Industrial
|
|
|
|
|
Geothermal
|
Severe Geothermal
|
|
Product
|
|
|
|
|
|
Galvsteel
|
|
|
|
|
|
Zincalume
|
|
|
|
|
|
Colorcote ZR8
|
|
|
|
|
Colorsteel Endura
|
|
|
|
|
Colorcote ZRX
|
|
|
|
|
Colorsteel Maxx
|
|
|
|
|
Colorcote AR8 & ARX Aluminium
|
|
|
Reference should be made to the coil and paint manufacturers’ own literature before choosing an appropriate finish.
As part of our continuous improvement program, information contained within this data sheet is subject to change.
Colorsteel, Endura, Maxx, Zincalume and Galvsteel are registered trademarks of New Zealand Steel.
Colorcote, ZR8, ZRX, AR8 and ARX are registered trademark of Pacific Coilcoaters.
bout any of our products, contact us today
|
)
)