Interpretation ID: aiam3112
Orient Glass
Inc.
445 South Figueroa Street
Los Angeles
CA 90071;
Dear Mr. Ohmura: This responds to your recent letter asking whether a bus bar extensio on rear-window passenger car glazing would comply with Safety Standard No. 205. I assume from your letter that the bus bar is a defrosting template that is embedded in the glazing material.; Safety Standard No. 205, through the ANS Z26 standard that i incorporated by reference, requires glazing materials requisite for driving visibility in passenger cars to have a luminous transmittance of at least 70 percent (Test No. 2 in ANS Z26). This requirement would be applicable to rear- window glazing for passenger cars, since these windows are necessary for driving visibility. Rear-window glazing that contains a bus bar extension and electrical template wires would still have to comply with the 70-percent luminous transmittance requirement, when tested in accordance with Test No. 2. The .67- inch bus bar extension would not preclude compliance with this requirement, although it obviously has no luminous transmittance, if the remaining parts of the glazing meet the 70-percent requirement. However, if the electrical wires of the template are so numerous or located so near each other that a tested section of the glazing would not have a luminous transmittance of at least 70 percent, the rear window would not be in compliance with Safety Standard No. 205.; Sincerely, Frank Berndt, Chief Counsel