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AS1170.2 Wind load on apartment blocks taller than surrounding buildings

AS1170.2 Wind load on apartment blocks taller than surrounding buildings

AS1170.2 Wind load on apartment blocks taller than surrounding buildings

(OP)
Hi Guys, just wondering if anyone can share their thoughts on this one as I want to get out of the office bubble of thought.

I'm designing framed glass balustrading for a 9 storey (approx. 30m tall) apartment block on the outskirts of the city centre (Wind Region A). All the surrounding buildings are only 3/4 storey, so less than half the height. Would a Terrain Category of 3 still be applicable for the upper storeys of the apartment block?

AS1170.2 shows diagrams on the lagged response of terrain categories but doesn't state the maximum height of this lag. Also, the AS1170.2-2002 supplementary shows the roughness level of 'centres of small towns' to be 0.4 (double that of 0.2 for Terrain Category 3), so I assume using TC3 would still be somewhat conservative even if the building rises above that of the surrounding buildings?

Thanks for any feedback.

RE: AS1170.2 Wind load on apartment blocks taller than surrounding buildings

Yes, if it meets the requirements in all directions for TC 3 then it is tc3. The terrain is the terrain, there is no reference to the building hieght in the descriptions. Shielding is not the same and it is dependent on the building in question dimensions.

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RE: AS1170.2 Wind load on apartment blocks taller than surrounding buildings

(OP)
Thanks for your help rowing

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