RM900 is a high-ribbed trapezoidal roofing product designed for greater spans, offering exceptional economic advantages on commercial and industrial buildings.
RM900 is a cost effective alternative to lower ribbed roofing offering greater spanning capabilities and wider coverage allowing fixers to cover greater areas at a faster pace. With a fully supported male rib, fixers find it provides extra strength and weather proofing around the fastenings.
RM900 clear sheeting is available in a matching profile in a variety of specifications.
| Span Table | Roof | Walls | |||||
| Internal | End | Internal | End | ||||
| Gauge | Light * | Heavy * | Light * | Heavy * | |||
| Steel | .40BMT | 2800mm | 2500mm | 1900mm | 1700mm | 3200mm | 2200mm |
| Steel | .55BMT | 3800mm | 3400mm | 3000mm | 2700mm | 3800mm | 3000mm |
| Aluminium | .70BMT | ||||||
| Aluminium | .90BMT | ||||||
* Refers to Roof Traffic. NB: Heavy roof-traffic purlin spacings provide a superior roof
Base Materials
RM900 is available in zinc coated and pre-painted steel in .40g and 55g (base metal thickness) and plain and pre-painted Aluminium .70g and .90g
Fasteners
Steeltite 14gx90mm and Timbertite 14gx100mm, Class 4 fixings compatible with the material being fitted.
Provision should be made for thermal expansion.
Foot Traffic
Foot traffic up the roof should be in the pan of the profile. Foot traffic across the roof should be on the purlins.
Durability
All materials should be checked for their compatibility and their warranties as to the suitability in the environment to which they will be exposed. Warranties must comply with the maintenance recommendations as set down by the material.
Design Details
For design details and best practice applications, please refer to NZ Metal Roofing Manufacturers’ Code of Practice.
Materials
Custom cut to length subject to available transport
| Zinc Alloy | Steel | .40BMT | AZ150 (150GM/M2) | G550 Mpa Yield Stress |
| Zinc Alloy | Steel | .55BMT | AZ150 (150GM/M2) | G550 Mpa Yield Stress |
| Pre-painted | Steel | .40BMT | AZ150 (150GM/M2) | G550 Mpa Yield Stress |
| Pre-painted | Steel | .55BMT | AZ150 (150GM/M2) | G550 Mpa Yield Stress |
| Pre-painted | Aluminium | .70BMT | 5052 | 305 Mpa Yield Stress |
| Pre-painted | Aluminium | .90BMT | 5052 | 305 Mpa Yield Stress |
Paint Finishes
ZinaCore – For general exterior roofing and cladding applications NOT suitable for use in severe or very severe marine environments
MagnaFlow – For general exterior roofing and cladding applications NOT suitable for use in very severe marine environments
AlumiGard – For general exterior roofing and cladding applications suitable for use in up to very severe marine environments
Installers
Only qualified approved roof installers should be used on your contract.
All installations should be to the standards as set out in the NZ Metal Roofing Manufacturers’ Code of Practice.