UHP safety inpsection manual:
PLT Safety Inspection Manual Revised January 1, 2006 63 VEHICLE WINDOWS - Continued Windshields are designed to support the roof of a vehicle and keep the driver and occupants protected in the event of a crash. Cracks in the windshield may cause a visibility problem. Cracks may be repaired in the acute area when the damage is one inch (1 ) or less in diameter, a size equal to a quarter coin. *NOTE: Architectural glass and Plexiglas is prohibited.
A. WINDSHIELD 1. Check windshield for appropriate AS number. a. REJECT when:
1) Windshield does not have AS1, AS10, or AS14 marking.
2. Visually inspect windshield for scratches, etching, or other marks. REJECT when:
1) Windshield glass is scratched, discolored, clouded or marked to the point vision is obstructed.
2) Windshield has decorative etching that is not OEM. 3. Check windshield for breakage.
a. REJECT when:
1) Windshield has outright breakage; glass shattered either on the inside or outside surface and/or broken glass leaving sharp or jagged edges.
2) Windshield cloudiness is more than 1 inch in from each side edge, more than 4 inches down from the top edge, or more than 3 inches up from the bottom edge.
3) Damage or repairs in the acute area that is more than 1 inch or larger than the size of a quarter coin.
PLT Safety Inspection Manual Revised January 1, 2006 64 VEHICLE
WINDOWS - Continued
4. Crack(s) from the 6 border area that extends into the acute area more than 1 inch. *NOTE: With the new rule regarding the acute area, multiple single cracks may be in the 6 border surrounding the acute area.
5. Check for unauthorized tinting, signs, posters or other non-transparent materials.
REJECT when:
1) Windshield allows less than 70% light transmittance and signs, posters, or any other non-transparent materials are MORE THAN 4 inches down from the top edge of the molding on the windshield or below the AS 1 line, whichever is Lower. *NOTE: All measurements are taken on the outside of glass from the edge where the glass and the molding meet.
The acute area (measured on the outside) of the windshield is defined vertically by measuring six inches (6 ) down from the top edge of glass where it meets the molding, six inches (6 ) up from the bottom edge of glass where it meets the molding. Horizontally, by measuring six inches (6 ) in from the left side edge of glass where it meets the molding and six inches (6 ) in from the right side edge of glass where it meets the molding. WHEN THERE IS ANY DAMAGE WITHIN THE ACUTE AREA, LARGER THAN ONE INCH (1 ) THE WINDSHIELD WILL BE REJECTED AND REPLACED.