I think I have it figured. You are right.
The commentary mentions deriving the C&C pressures from enveloping the
extreme pressures obtained from a model rotated through 360 degrees in a
wind tunnel.
To AS1170.2 I have to work such effects out, it would typically be the
longitudinal loading which produces a symmetrical loading: I would magnify
those pressures for small tributary areas.
Thanks for the feedback.
Regards
Conrad Harrison
B.Tech (mfg & mech), MIIE, gradTIEAust
mailto:sch.tectonic@bigpond.com
Adelaide
South Australia
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