An Introduction to Wind Classification using Australian standard AS4055 -2012.

Join Cornell Engineer's team of structural engineers for a training session on the use and application of Australian wind design standard AS4055.
AS4055 is the dummies version of wind speed design for residential buildings. It differs from AS11702. in that wind speeds are broken down into wind classifications instead of wind velocities in metres per second.
The wind pressures and velocities are still based on AS1170.2 but the tabulated form of pressures and loads makes it easier for builders, glaziers, roof sheeting suppliers and carpenters to ensure the building is designed appropriately for the wind speed.
The downside of using AS4055 is it is a blunt tool for calculating wind velocities and pressures. If the building being designed is close to a hill (topographic influencer if you like) then the position of the building on or near the hill skews the forces upwards considerably compared to the more technical (and accurate) approach in AS1170.2 - Kind of like a dummies factor on steroids.
AS4055 definitely has its uses though. It makes wind speed classification easier to communicate and easier to understand on site. C2 means a lot more to a builder than 61m/s for example.

The Powerpoint slides for this training session are on our website here:
https://www.cornellengineers.com.au/w...
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