Theory
SURE SHADE® Motorised operable and External retractable blinds/louvres Types & Construction (external venetian blinds)
Background
In excess of over 2 million external retractable blinds or external venetian blinds are sold annually in Europe, and to date these models have either been fully imported or copied and assembled in Australia. However the European market has accepted that blinds or louvres should be retracted in moderate winds as Europe does not have the experience of high wind and summer heat and the European market is also most interested in heat lose rather than heat gain.
Current Australian Standard for Wind Actions
Double Skin glazing structures
Wind Loading
Wind test results and in situ reality
To date wind testing of external retractable blinds and external venetian blinds has been done in two ways. There is standardised European testing to the Swiss procedure or individual wind velocity testing with direct wind flow.
Summary
Category 1 Basic wind loading models
(internal venetian blind methodology)
Ladder braid slat control & wire or extruded side guides & Zamac slat side pins
Category 2 Superior wind loading models
(progressive engineered designs)
Hagofix® slat control, extruded side guides with plastic rails & Zamac slat side pins
Category 3 Ultimate wind loading models
(total product engineering including slat, fittings, pelmet and tracking)
Wind stable aerodynamic slat profile, integrated sealing keder for maximum light minimisation and improved sound insulation, Hagofix® slat control, extruded side guides with plastic rails, Zamac side pins, 316 stainless steel end caps, grub screws & eye pin.