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NZMRM corrosion testing of fasteners and their interaction with metal cladding

Submitted by Nathaniel Duncan on Mon, 26/08/2024 - 10:58am

In 2012 and 2019 we reported on the previous stages of this project.  As we now approach the end of five years of the most recent stage, this article reviews the whole project and provides more detail of the current phase, and what may come next...

One aspect of all this testing to...

Recylcing and Recyclability

Submitted by Nathaniel Duncan on Tue, 14/05/2024 - 12:29pm

Recent initiatives by New Zealand Steel and by Pacific Coil Coaters, our primary suppliers of metallic coated and painted steel, will improve the sustainability of their operations, as reported in Scope 58 and in this issue 59, and we thought it worth revisiting an article published originally...

Reflectivity, Reflectance and Glare

Submitted by Nathaniel Duncan on Mon, 20/11/2023 - 3:36pm

This is a review and update of an article published in Scope 10 years ago. We then produced two  technical articles about Solar Reflectance and Thermal Emittance and the relationship between the apparent visual colour of a metal roof and its ability to absorb or not absorb heat.  The way in...

Green Steel

Submitted by Nathaniel Duncan on Sat, 23/09/2023 - 4:19pm

Is there such a thing?  Isn’t steel, in spite of the fact much of our construction and much else relies totally on it, full of carbon and dreadfully unsustainable?  Can it ever be “green” – which today seems to mean “carbon zero” (another catchphrase)?  Isn’t use of steel always going to...

NZMRM And Wind Load Testing: Part 2

Submitted by Nathaniel Duncan on Thu, 21/09/2023 - 11:50pm

In writing this it was not easy to reconstruct the first 8 or 9 years of life of the NZMRM Test Rig. Although the author was involved during most of its life (as an NZMRM Executive member) this involvement increased from “knowing about it” to more recently managing it and hands on “driving”. So...

Sustainable Water

Submitted by Nathaniel Duncan on Thu, 21/09/2023 - 11:23pm

Back in Issue 25 in 2010 Graham Hepburn reviewed the importance of water and the sustainable process of harvesting drinking water from metal roofs. We republished a revised version of this in 2019. In light of the “Three Waters” reforms we feel this is again relevant, and now look at this topic...

The Onemana Surf Club

Submitted by Nathaniel Duncan on Thu, 21/09/2023 - 11:33pm

Created offsite, a new modular building has expanded the capabilities for this Coromandel surf club. Using COLORSTEEL Altimate® cladding, the new club offers a crisp aesthetic that will last for years to come.   

Since its formation in 1989, the Onemana Surf Club has operated out of...

NZMRM And Wind Load Testing

Submitted by Nathaniel Duncan on Thu, 21/09/2023 - 4:17pm

Part 1: Setting the scene.

Wind events and cladding.

The primary purpose of a roof (or wall) is to keep rain and wind out of the building it is over or around. This means it must stay on the building regardless of whatever the weather throws at it...

Roof Drainage

Submitted by Bruce Duncan on Fri, 05/02/2021 - 10:55am

58% of designers canvassed at a recent webinar had experienced troubles with flooding internal gutters. This is not surprising, because gutters designed in accordance with the Acceptable Solution, E1/AS1, are designed to fail.

Limitations of E1/AS1

At the core of this problem is...

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