Featuring a 90-minute fire rating, the Clarity hollow glass block (8″x8″x4″) from the High Performance series delivers maximum visibility and light transmission. The Clarity 90-Minute block is also impact resistant, combining safety with clarity.
- Specs
- Mortar Accessories
- Resources
- Actual Size: 7-3/4" x 7-3/4"x 3-7/8"
- Weight: 10.6
- Approx. Installed Weight with mortar per ft²: 25.5
- Pieces per Square Foot: 2.25
- Heat Transmission U-Value (BTU/hr ft2 °F): 0.51
- Thermal Resistance R-value (hr ft2 °F/BTU): 1.96
- Privacy: Minimal
- Fire Rating: 90
- Visible Light Transmission: 69
- Shading Coefficient: 0.65
- Sound Transmission S.T.C.(dB): 50
- Solar Heat Gain Coefficient: .66-.68⁵
