Structural Glass Properties: insulating_glass_unit
Mechanical, thermal, and optical properties for architectural and structural glass types. Covers annealed float (3-19 mm), heat-strengthened (4-15 mm), fully tempered (4-19 mm), laminated annealed and tempered (PVB and SGP interlayers), insulating glass units (double clear, double low-E, double high-performance, triple clear, triple low-E), chemically strengthened (2-3 mm), wired glass, and ceramic frit tempered glass. Each record includes density, elastic modulus, Poisson's ratio, characteristic strength, allowable stress (short and long duration), surface compressive stress range, thermal expansion coefficient, thermal conductivity, U-value (IGU), SHGC, visible transmittance, breakage pattern, and deflection limit. 43 records per EN 572/EN 16612, ASTM E1300, ASTM C1048, and NFRC standards.
| glass type | SHGC (dimensionless) | U value center W per m2K (W/(m^2*K)) | breakage pattern | configuration | deflection limit L over (dimensionless) | density kg per m3 (kg/m^3) | modulus of elasticity GPa (GPa) | notes | poisson ratio (dimensionless) | record key | subtype | surface compressive stress MPa max (MPa) | thermal expansion coeff per C (1/degC) | thickness mm (mm) | visible transmittance (dimensionless) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| insulating_glass_unit | 0.78 | 2.7 | per_component | 6mm+12air+6mm | 60 | 2,500 | 71.7 | Standard double-pane IGU: 6mm clear + 12mm air gap + 6mm clear; U-value center-of-glass per NFRC 100; no coating; widely used baseline reference | 0.22 | double_clear#6mm+12air+6mm | double_clear | 0 | 0.000009 | 24 | 0.79 |
| insulating_glass_unit | 0.27 | 1.2 | per_component | 6mm+16argon+6mm | 60 | 2,500 | 71.7 | High-performance double IGU: 16mm argon + two low-E coatings (surfaces 2 and 3); typical curtain wall specification; SHGC ~0.27 for solar control facades | 0.22 | double_high_perf#6mm+16argon+6mm | double_high_perf | 0 | 0.000009 | 28 | 0.4 |
| insulating_glass_unit | 0.4 | 1.5 | per_component | 6mm+12argon+6mm | 60 | 2,500 | 71.7 | Double-pane with hard-coat low-E (#2 surface) + argon fill; SHGC varies with coating type (0.25-0.55 range typical); value shown for moderate solar control low-E | 0.22 | double_low_e#6mm+12argon+6mm | double_low_e | 0 | 0.000009 | 24 | 0.7 |
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