Elevated glazing applications – any louvre might not be suitable
Besides compliance with AS2047 and AS1288, louvre windows in an elevated application will have a number of additional requirements to ensure they comply with the National Construction Code.
- NCC Vol 1 & Vol 2 have structural provisions that a building element must safeguard people from injury caused by structural failure or impact with glazing. AS1288 cites that glazing within 2m of floor area can be subject to human impact. As a traditional louvre blade is not mechanically held in place it is important to determine whether those louvres subject to risk of human impact could suffer a structural failure. AS1170.1 Table 3.3 outlines “Minimum Imposed Actions for Barriers” in various applications. These loads are considerably more than a louvre without mechanical blade fixing could withstand.
- Fall prevention through openable windows is another consideration in the NCC. The ICP.005 “Protection of Openable Windows” outlines testing requirements for windows requiring fall prevention. Work is underway to convert this ICP to an Australian Standard. One aspect of this testing is the application of a 250N load on the edge of the louvre blade at its most vulnerable point for a 10 second duration. This test is failed if the blade is dislodged at all from one or both louvre clips. A louvre that is unable to pass this test may not comply with the NCC requirements.
To install a product that does not meet these requirements is irresponsible and could cause considerable suffering for anyone hurt, which would also have disastrous consequences for the window supplier.
Breezway developed the Stronghold System for the Altair Louvre so that the designer and window fabricator can have a product that has sound design principles and testing available to understand its suitability to an “elevated glazing position”.
Breezway manufactures Altair Louvre Windows in glass, timber and aluminium. They are energy and cyclone rated and suitable for multi-storey applications.Learn more
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