Fire Rating of Acrylic

Both cast and extruded Acrylic burn more or less like hardwood; very little smoke generation. Its combustion gases are non-toxic and non-corrosive.

Cast PMMA (Acrylic) is classed

  • Classification E, according to the “EURO-Norm” (DIN EN SO 11925:2:2002-07) . Find the test report  here (German only).
  • B2, with no burning droplets, according to DIN 4102 (Germany)
  • M4 (no droplets) according to NF 92500+ (France).
  • The Results of tests for fire propagation when tested to BS 476 Part 7 confirm that acrylic glazing achieves a Class 3 classification (U.K.).
  • This material can thus be classified Category TP(b) according to BS 2782, Method 508 A for thermoplastics material as defined by the Building Regulations.(U.K.)

Its standard glow wire resistance is IIIa or BH3 to DIN VDE 0304, Part 3, and the UL flammability is UL 94 HB.

It is strongly dependent on the individual country’s fire regulations if acrylic can be used in buildings as walls, roofs or ground. The use of acrylic outside a building as facade elements or part of the storefront is less critical. We recommend to work on an individual solution with your local authorities for your specific project.

flame_acrylic

Categories: Technology of Glazing under Pressure
Created: 22 March 2013
Last Modified: 8 July 2016

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