Request for Proposal [insert date]

Materials

Safety Glass Glazing Panels

Side windows glazing material shall have a minimum of 3/16 in. nominal thickness tempered safety glass. The material shall conform to the requirements of ANSI Z26.1-1996 Test Grouping 2 and the Recommended Practices defined in SAE J673.
Alternative

Polycarbonate Glazing Panels

Side window glazing material shall have a minimum 3/16 in. nominal thickness. The material shall conform with the requirements of ANSI Z26.1-1996, “Standard for Type AS-5 Safety Glazing Materials,” except for Test Number 17, which shall subject the specimens to 100 cycles with less than 4 percent hazing and 500 cycles with less than 12 percent hazing. Windows shall be polycarbonate sheet with an abrasion resistant coating on both sides of the window.
Alternative

Acrylic Glazing Panels

Side window glazing material shall have a minimum of 3/16 in. nominal thickness. The material shall conform with the requirements of ANSI Z26.1-1996, “Standard for Type AS-5 Safety Glazing Materials,” except for Test Number 17, which shall subject the specimens to 100 cycles with less than 4 percent hazing and 500 cycles with less than 12 percent hazing. Windows shall be cell cast acrylic sheet with an abrasion resistant coating on both sides of the window.
Alternative

Laminated Glazing Panels (Not Available on Hidden Frame [Seamless] Windows)

Side windows glazing material shall have a minimum of 3/16 in. nominal thickness laminated safety glass. The material shall conform to applicable requirements of ANSI Z26.1-1996 and the Recommended Practices defined in SAE J673.
Alternative

Laminated and Tempered Safety Glazing with Anti-vandalism Polyester Sacrificial Film

All glazing material that is aft of the standee line shall be equipped with 6 mm laminated polyester film. This material shall be easily installed and removed without the use of specialized tools. Polyester film shall adhere to the window and be resistant to peeling, curling and discoloration by ultraviolet rays. The film shall withstand normal cleaning operations.
Alternative

Anti-Vandalism Sacrificial Liner (“Quick Change”)

All glazing material aft of the standee line shall be equipped with necessary bracketry, fasteners and clear acrylic liner that shall be easily removable in the event of vandalism. The acrylic liner shall be clear and shall have minimal effect on the transmittance of the underlying glazing. This material shall not be adversely affected by ultraviolet rays and shall withstand normal cleaning practices. The installation of the liner shall prevent clouding or fogging. This acrylic sacrificial liner must be replaced without removing the window from its installed position on the bus, without removing the tempered glazing from the sash, and without the removal or manipulation of the window assembly’s rubber molding.

Windows on the bus sides and in the rear door shall be tinted a neutral color, complementary to the bus exterior. The maximum solar energy transmittance shall not exceed 37 percent, as measured by ASTM E-424. Luminous transmittance shall be measured by ASTM D-1003. Windows over the destination signs shall not be tinted.

Default (light)

55 percent luminous transmittance.

75 percent luminous transmittance.

27 percent luminous transmittance.

Property to specify, but by no less than 12 percent.

Safety Glass Glazing Panels

Side windows glazing material shall have a minimum of 3/16 in. nominal thickness tempered safety glass. The material shall conform to the requirements of ANSI Z26.1 Test Grouping 2 and the Recommended Practices defined in SAE J673.
Alternative

Polycarbonate Glazing Panels

Side window glazing material shall have a minimum of 3/16 in. in. nominal thickness. The material shall conform to the requirements of ANSI Z26.1-1977, “Standard for Type AS-5 Safety Glazing Materials,” except for Test Number 17, which shall subject the specimens to 1000 cycles and the arithmetic mean of the percentages of light scattered shall not exceed 5 percent. Windows shall be polycarbonate sheet with an abrasion-resistant coating on both sides of the window.
Alternative

Acrylic Glazing Panels

Side window glazing material shall have a minimum of 3/16 in. in. nominal thickness. The material shall conform to the requirements of ANSI Z26.1-1977, “Standard for Type AS-5 Safety Glazing Materials,” except for Test Number 17, which shall subject the specimens to 1000 cycles and the arithmetic mean of the percentages of light scattered shall not exceed 5 percent. Windows shall be cell cast acrylic sheet with an abrasion-resistant coating on both sides of the window.
Alternative

Laminated Glazing Panels

Side windows glazing material shall have a minimum of 3/16 in. in. nominal thickness laminated safety glass. The material shall conform to applicable requirements of ANSI Z26.1 and the Recommended Practices defined in SAE J673.
Alternative

Anti-Vandalism Polyester Sacrificial Film

All glazing material that is aft of the standee line shall be equipped with 6 mm laminated polyester film. This material shall be easily installed and removed without the use of specialized tools. Polyester film shall adhere to the window and be resistant to peeling, curling and discoloration by ultraviolet rays. The film shall withstand normal cleaning operations.
Alternative

Anti-Vandalism Sacrificial Liner (“Storm Window Type”)

All glazing material aft of the standee line shall be equipped with necessary bracketry, fasteners and clear acrylic liner that shall be easily removable in the event of vandalism. The acrylic material shall be clear and shall have minimal effect the transmittance of the underlying glazing. This material shall not be adversely affected by ultraviolet rays and shall withstand normal cleaning practices. The installation of the liner shall prevent clouding or fogging. A mechanic shall be able to easily remove and replace the acrylic liner without the use of any specialized tools in 5 minutes or less.

Windows on the bus sides and in the rear door shall be tinted a neutral color, complementary to the bus exterior. The maximum solar energy transmittance shall not exceed 37 percent, as measured by ASTM E-424, and the luminous transmittance shall be no less than 16 percent, as measured by ASTM D-1003. Window at the destination/location sign shall not be tinted in the vicinity of the sign.