Solbet
SOLBET since 1951

Fire Resistance

Fire Resistance

AAC is non-combustible and falls under fire reaction euroclass A1. During fire it does not emit any harmful or poisonous substances. AAC blocks do not take part in a possible fire, they will stand on the verge of spreading fire. Their high resistance to high temperatures is evidenced by the fact that the AAC is used in chambers in which fire tests of other building materials are performed.

FIRE CLASSIFICATION OF WALLS MADE OF SOLBET BLOCKS ACCORDING TO EN 1996-1-2

Width [mm]

EI (according to N.B.4.1 EN 1006-1-2) REI (according to N.B.4.2 EN 1996-1-2)

non-plastered walls

plastered walls non-plastered walls plastered walls
wall load proportions wall load proportions
α ≤ 1 α ≤ 0,6 α ≤ 1 α ≤ 0,6

lower 
limit

upper 
limit

lower 
limit

upper 
limit

lower 
limit

upper 
limit

lower 
limit

upper 
limit

lower 
limit

upper 
limit

lower 
limit

upper 
limit
60 EI 60 EI 90 EI 90 EI 120 - -
80 EI 90 EI 180 EI 120 EI 180 - -
100 EI 90 EI 240 EI 180 EI 240 REI 30 REI 120 REI 30 REI 120 REI 30 REI 120 REI 30 REI 180
120 EI 240 REI 60 REI 120 REI 90 REI 120 REI 90 REI 120 REI 120
180 EI 240 REI 90 REI 240 REI 180 REI 240 REI 90 REI 240 REI 180  
240 EI 240 REI 180 REI 240 REI 240 REI 180 REI 240 REI 240
300 EI 240 REI 180 REI 240 REI 240 REI 240
360 EI 240 REI 240
420 EI 240 REI 240

Notes to the table:

  • The thickness in the table refers to the thickness of the wall without finishing, i.e. used blocks.
  • The term plastered wall means the wall plastered on both sides with the use of gypsum plaster or 10 mm thick heat-insulating mortar or plastered on one side, the side exposed to fire.
  • The coefficient α - means the proportion of load bearing capacity of the wall.