High Performance Thickset Clarity 90 is comprised of 4″ hollow block with thicker faces. This extends the fire rating to 90 minutes when used as window assemblies within fire rated walls. Increasing the face thickness allows for higher levels of safety, security, and reduced sound transmission is used in buildings designed for public use; hotels, schools, nursing homes, restaurants, cinemas, etc., and in buildings where flammable or combustible materials are stored and/or handled.
The transparent glass design allows the passage of light, maintaining its direction and shape without altering its integrity.
Actual size of each block 7 3/4″ x 7 3/4″ x 3 7/8″.