Fire Resistance and Combustion Classification
Two main standards guide fire safety in building interiors: Standard 931 evaluates the fire resistance of structural elements, while SI 755 classifies material behavior during a fire. Both standards assess material performance at high temperatures, temperature development during a fire, mechanical behavior, and overall fire resistance of building components.
Maximum Fire Resistance of White Block
Ashkalit blocks meet Israeli fire resistance standards and hold the highest V1.4.4 fire rating, classified as non-combustible by the Standards Institute. They excel across parameters like toxic emissions, combustibility, flammability, and smoke density. Using Ashkalit blocks in insulation walls protects the structural frame during fires and prevents heat transfer to the reinforcement and concrete.
Fire Resistance of 3–6 Hours
The white block offers particularly high fire resistance of 3 to 6 hours, depending on the block thickness and the plaster coating. A 10 cm-thick bare Ashkalit block resists fire for at least 100 minutes, while the same block with a 2 cm-thick cement plaster coating on each side can resist fire for at least 180 minutes. A 20 cm-thick Ashkalit block can achieve a fire resistance level of at least 6 hours.