The greater the equivalent thickness, the greater the fire rating.
Fire Resistance Ratings of CMU Walls Calculator
Applying plaster of gypsum wallboard will also increase the fire resistance.
Exterior Walls – Masonry Block Wall Fire Rating
Portland cement (proportioned by volume) and not more than 50 percent hydrated lime (by cement volume). As an example, an 8″ standard weight block has a 1 hour rating and an 8″ lightweight block has a 2 hour rating. Colours are representational only, please visit a sales centre for current samples. Fire resistance of concrete masonry walls is a function of aggregate type and equivalent thickness of the masonry units.
Concrete Block Fire Resistance Test
The brief was to remove the non rated decorative wall and install 2 hour fire rated wall to house the buildings new hydrant pump.
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