GB/T 2680-1994
Determination of light transmittance,solar direct transmittance,total solar energy transmittance and ultraviolet transmittance for glass in building and related glazing factors (English Version)
- Standard No.
- GB/T 2680-1994
- Language
- Chinese, Available in English version
- Release Date
- 1993
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2021-10
- Replace By
- GB/T 2680-2021
- Latest
- GB/T 2680-2021
- Replace
- GB 2680-1981
- Scope
- This standard specifies the measurement conditions and calculation formulas for visible light transmittance (reflection) ratio of architectural glass, direct sunlight transmittance (reflection, absorption) ratio, total solar energy transmittance, ultraviolet transmittance (reflection) ratio, hemispheric emissivity and shading coefficient. This standard applies to the determination of the optical properties of architectural glass and its single-layer and multi-layer glass components.
GB/T 2680-1994 history
- 2021 GB/T 2680-2021 Glass in building—Determination of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing factors
- 1993 GB/T 2680-1994 Determination of light transmittance,solar direct transmittance,total solar energy transmittance and ultraviolet transmittance for glass in building and related glazing factors
- 0000 GB 2680-1981
