Roofing Standards Nz

Durolite natural lighting sheets for roofs and walls provide good strength and durability for commercial building applications.

Roofing standards nz.

Steel based products used for cladding in new zealand are either nominally g300 or g550 high tensile mpa. Published by standards new zealand the trading arm of the standards council private bag 2439 wellington 6140. A maximum truss span of 12 m a maximum truss spacing of 900 mm for a heavy roof and 1200 mm for a light roof the load on the ends of the trusses to be no more than 16 kn in both directions up and down a maximum snow load of 2 kpa. It is guaranteed to transmit natural light for a period of 25 years while retaining.

We specialise in managing the development of standards. Astm s roofing standards are instrumental in specifying testing and evaluating the dimensional mechanical and performance requirements of various forms of roofing systems. Durolite is a premium grade glass fibre reinforced polyester sheet manufactured using advanced gel coat technology with an integral 100 micron thick gel coat on the top surface. These systems are assembled in the uppermost part of building structures to provide protection and insulation from external elements such as rain sunlight and heat.

Standards new zealand is a business unit within the ministry of business innovation and employment. The roofing association of new zealand ranz represents over 300 nz roofing member businesses nationwide. A number of new zealand and joint australian new zealand standards cover roof construction roofing materials and components. The new zealand building code sets the minimum performance parameters for the design and construction of roofs.

The new zealand roof and wall cladding code of practice has been written for new zealand conditions that recognize it as an unique island 2 000 km away from another major land mass which is subject to high rainfall high humidity extremes of weather and high winds. Most steel used for roof and wall cladding in nz is nominally g550 although this often has actual strength up to 700 mpa. G300 is used for forming tiles or curved roof sections or where greater ductility is required. Ranz works on behalf of its members to develop industry communication regulation training and more for improvement in housing quality and the industry as a whole.

The contents of this code of practice are relevant to other countries. Ranz members have passed strict criteria to gain membership status.