BS EN 12833:2001 – Skylight and conservatory roller shutters — Resistance to snow load — Test method

1 Scope
This European Standard specifies the methods of test to be applied to evaluate the snow load resistance performances of shutters inclined less than 60° from the horizontal, those resistant either alone or in mechanical association with the glazing. It applies to – skylight roller shutters ;
– conservatory roller shutters.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies (including amendments).
EN 1932 “External blinds and shutters – Resistance to wind loads – Method of testing”
prEN 12216:1995 “Shutters, external blinds, internal blinds – Terminology, glossary and definitions”
EN 13527 “Shutters and blinds – Measurement of operating force – Test methods”
prEN 13659:1999 “Shutters – Performance requirements including safety”
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in prEN 12216:1995
and the following apply.
3.1
direct nominal test pressure p N
uniform pressure or loads reproducing a uniform pressure, exerted on the external face of the test sample
3.2
safety pressure p s
uniform pressure or loads set out reproducing a uniform pressure under which there shall be no rupture of the product. The safety pressure p S is linked to the nominal pressure p N by the coefficient f S
3.3
dimensions
3.3.1
height H
visible height of the curtain including the bottom lath
3.3.2
width L
visible width of the curtain
3.3.3
surface of loading
given by L x H
3.4
distance d
distance between the internal face of the curtain and the glazing, measured with the curtain in the fully extended position
4 Test conditions
4.1 Test principle
To verify the holding of shutters under nominal pressure p N and safety pressure p S representing the particular applicable snow pressure.
Two forms of resistance to snow load are envisaged.
a) The shutter resists alone the snow pressure without contact with the glazing,The pressure is applied gradually to p N and the corresponding displacement in the center of the curtain measured.
b) The shutter resists the snow pressure together with the mechanical association with the glazing.
BS EN 12833:2001 – Skylight and conservatory roller shutters — Resistance to snow load — Test method