1 Scope
Classes A1a and B1a porcelain (as defined in ISO 13006) are now manufactured in much larger formats than previously available and are increasingly
being used as an external cladding material for buildings.
Classes A1b, A11a, and AIIb extruded ceramics (as defined in ISO 13006) are not covered by the scope of this document. These materials, when specifically
developed for external façade applications, have been used extensively for many years
and established methodologies already exist.
Large format porcelain tiles or panels are generally considered to be too large to be used externally on high
buildings when installed by conventional adhesive fixing methods (ISO/TR 17870‑1 and ISO/TR 17870‑2); therefore, mechanical fixings are used.
As there are currently no published standards or guidelines for these products to
be installed in this way, this document provides generic information on some typical
types of mechanical fixing systems in use together with positive and negative wind load factors and typical testing procedures that can be used for evaluating anchor pull-out
or edge fracture resistance. Also, because the current impact resistance test method
for ceramics tiles (ISO 10545‑5) relates only to traditional (bedded) installed tiling – which measures the coefficient
of restitution – it is not an appropriate test for unbedded (unsupported) tiles, so
alternative test methods (ISO 7892) are referred to for measuring hard-body and soft-body impact resistance.
Guidance is provided regarding typical impact zones of vulnerability ...