Opinions

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Help I can’t breathe — the battle against complacency on climate change

By |2021-05-03T13:56:08+10:00May 3rd, 2021|News, Opinions|

If engineers do one thing well it is listen to the design engineers, evaluate the numbers and their results and as such construct safe and usable structures built both high and dug deep in the ground. The science of climate change is unequivocal and the evidence (bushfires, flooding, cyclones and droughts) is manifesting itself at [...]

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Critical Velocity and Tunnel Smoke Control Part Two

By |2021-05-19T11:01:57+10:00May 3rd, 2021|Opinions|

Filling the NFPA 502 void Michael Beyer, Conrad Stacey, Arnold Dix This article should be read as continuation of our earlier part one note to the ATS about Annex D of (NFPA 502, 2020). It proposes a value for critical velocity, filling the void to be left by the intended removal of Annex D from [...]

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Critical velocity and the significance of the imminent retraction of 2020 NFPA 502’s Annex D critical velocity equations Part One

By |2021-05-19T11:02:31+10:00March 11th, 2021|News, Opinions|

Michael Beyer, Conrad Stacey, Arnold Dix This note summarises what was discovered in a review of the technical background for the change to the critical velocity values resulting from Annex D of (NFPA 502, 2020), as well as the recent developments regarding the critical velocity in Annex D of (NFPA 502, 2020), and why [...]

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