Codes Regulations  
ISO Releases Trio of Glass Standards;  
SHGC Standard for Fenestration  
he International Organization  
for Standardization (ISO) has  
published three new standards  
under the auspices of its Glass in Build-  
ing technical committee (see box). Two Explosion-resistant security glaz-  
are in the“basic soda lime silicate glass  
products” category, while the other is  
tance, solar direct transmittance,  
total solar energy transmittance, ul-  
traviolet transmittance and related  
glazing factors;  
ing—Test and classification for  
arena air-blast loading;  
under “heat soaked tempered soda Explosion-resistant security glaz-  
lime silicate safety glass.”  
The Glass in Building subcom-  
ing—Test and classification by  
shock-tube loading;  
mittees have more standards under Bullet-resistant security glazing—  
development, according to the latest Test and classification;  
information listed in ISO’s catalogue. Forced-entry security glazing—Part Standardization, headquartered in  
The International Organization for  
They are:  
2: Test and classification by repetitive Geneva, Switzerland, recently published  
impact of a hammer and axe at room new standards on the use of glass in  
Electrochromic glazings—Acceler-  
ated aging test and requirements;  
buildings, as well as one related to  
Vacuum glass—Part 1: Basic speci- Forced-entry security glazing—Part doors and windows.  
fication of products and evaluation  
methods for thermal and sound in-  
sulation performance;  
3: Test and classification by manual  
• Forced-entry security glazing—Part  
• Determination of emissivity.  
In addition, ISO has published ISO  
Vacuum glass—Part 2: Mechanical  
Determination of light transmit-  
4: Test and classification by pendu- 19467:2017, “Thermal Performance  
lum impact under thermally and fire of Windows and Doors—Determina-  
stressed conditions; and  
tion of solar heat gain coefficient using  
solar simulator,” which specifies a  
method to measure the solar heat gain  
coefficient (SHGC) of complete doors  
and windows.  
Glass in Building – Basic Soda Lime Silicate Glass Products  
Part 2: Float Glass  
ISO 16293-2:2017 specifies dimensional and minimum quality require-  
ments—in respect of optical and visual faults—for float glass for use in build-  
ings, according to the standard’s scope. It applies to float glass supplied in  
stock sizes and final cut sizes.  
According to the document, it is  
“designed to provide solar heat gain  
coefficient values by standardized  
measurement method and to enable a  
fair comparison of different products.”  
The document applies to doors and  
windows with various types of glazing,  
including systems that are single- or  
multi-glazed; with or without low-E  
coatings; and with spaces filled with  
air or gases.  
Glass in Building – Basic Soda Lime Silicate Glass Products  
Part 3: Polished Wired Glass  
ISO 16293-3:2017 specifies dimensional and minimum quality require-  
ments—respecting optical, visual and wire faults—for polished wired glass  
used in buildings. According to its scope, the standard applies only to polished  
wired glass supplied in rectangular panes, in-stock sizes and final-cut sizes.  
Glass in Building – Heat Soaked Tempered Soda Lime  
Silicate Safety Glass  
ISO 20657:2017 specifies product definitions, product characteristics, i.e. tol-  
erances, flatness, edgework, etc., fracture characteristics, including fragmen-  
tation, and the physical and mechanical characteristics of flat, heat soaked  
tempered soda lime silicate safety glass for use in buildings, according to its  
scope. The standard does not cover curved (bent) glass.  
It also applies to doors and win-  
dows with opaque panels, as well as  
various types of frames, shading de-  
vices and solar fenestration systems,  
including building-integrated photo-  
voltaics or building-integrated solar  
thermal collectors. n  
USGlass, Metal & Glazing | July 2017  

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