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Composite doors that passed bs476 include models with cores that melt when tested and release (likely highly toxic) smoke. There is no smoke control part of this test, so not a fail... but when you do the burn test you can see the door is unsafe as it belches out smoke. they were still marketed as ok and are now defended by manufacturers and developers on the basis that they 'met the standards of the time' and any failure is due to inadequate maintenance.

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