High winds accompanying thunderstorms probably cause more damage than the
occasional tropical cyclone. Yet our wind loading codes don't really cover
the violent down drafts associated with such storms.
Also a tropical cyclone / hurricane is tracked for some 24hours before it
hits land, and is seasonal, whilst a thunderstorm lucky to get 15 minutes
warning and can occur throughout the year.
Yet required to design building as open in hurricane regions, windows
broken. Whilst in non-hurricane regions can assume building sealed. Yet at
the design wind speeds considered, those hanging baskets on the pergola are
going to destroy the window.
Regards
Conrad Harrison
B.Tech (mfg & mech), MIIE, gradTIEAust
mailto:sch.tectonic@bigpond.com
Adelaide
South Australia
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