2. Application technical notes
The carrier sheet of 4BIRD is typically a monolithic Fully Tempered safety glass SECURIT-H [>]. Laminated compositions are normally comprised of individual sheets of Heat-Strengthened glass PLANIDUR with 0.76 mm PvB interlayer. The coatings are positioned on both of the outer surfaces.
The minimum glass thickness for the carrier sheet is 4mm but the actual required thickness needs to be checked for structural capacity and prevailing local technical regulations. The glass thickness has no influence on the bird-protection function. Reflective glass coatings are nor permitted. To improve the acoustic performance we recommend using STADIP SILENCE [>].
In contrast to adhesive films or plastics, the fused-in ceramic 4BIRD marking is a permanent and proven solution. We strongly advise against subsequent application of films onto Fully Tempered glass since this will compromise the safety function should the glass break (shatter into small pieces).
Generally the glass should be installed so the coating is facing the expected approach path of the birds. For free-standing structures such a noise barriers or waiting rooms, it is not possible to determine approach path. It is therefore recommended to use a double-sided 4BIRD marking. This is only possible using laminated safety glass.
To find the optimum project solution, many organisations are available for consultation. In Austria, the Vienna Environmantal ministry has a consultation service using actual research results. [Contact]
Our general Glazing guidelines are also applicable for 4BIRD [>].