Polycarbonate Performance Chart

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                                                                                                        Polycarbonate Performance Chart

Multi Wall Monolithic
Sheet Thickness MM 8 25 25 25 6
Inch 5/16 1 1 1 1/4
Wall Type Twin Five Five/M Five/Superlife N/A
Rib Spacing Inch 0.35 0.787 N/A N/A N/A
Structure Type Polycarbonate Walls
Weight (lbs./ft²) 0.35 0.7 0.7 0.70 1.46
Light
TransmissionASTM-D1003 (%)
Clear 81% 60% 60% 83%
Bronze 52% 20% 26% 50%
Opal 66% 30% 30%
Blue/Opal 20%
Gold/Opal 20%
Athermic/Opal 20%
Minimum Bending Radius (ft./1″) 3′-11″ 12′-5″ 12′-5″ 12′-5″ 23′-6″
U-Factor 0.56 0.29 0.31 0.26 0.9
R-Value 1.67 3.57 3.26 3.78 1.11
U-VALUE –  Measure of the ability of different structural components to conduct heat. The U-value of polycarbonate is measured by the number of BTUs that will pass through each square foot of area, per degree of temperature difference, from one side of the polycarbonate to the other. U-values indicate how well the polycarbonate will hold the heated or cooled air. The lower the U-value, the greater the polycarbonate’s resistance to heat flow and the higher the insulating value. The U-value is the inverse of the R-value.
R-VALUE – Measure of resistance to heat gain or loss (insulative ability). R-values, rather than thicknesses, can be compared for different materials. The higher the R-value, the greater the polycarbonate’s resistance to heat flow and the higher the insulating value. The R-value is the inverse of the U-value.
SOLAR HEAT GAIN COEFFICIENT (SHGC) – The fraction of solar radiation transmitted through polycarbonate expressed as a percentage. The lower a polycarbonate’s SHGC, the less solar heat it transmits and the greater its shading ability. Generally, a lower SHGC is desirable in warm climates and a higher SHGC is desirable in cold climates. SHGC has replaced Shading Coefficient as the standard indicator of polycarbonate’s shading ability.
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