Appendix A to Part 223 - Certification of Glazing Materials
49:4.1.1.1.18.4.15.1.32 : Appendix A
Appendix A to Part 223 - Certification of Glazing Materials
As provided in this part, certified glazing materials installed
in locomotives, passenger cars, or cabooses must be certified by
the glazing manufacturer in accordance with the following
procedures:
a. General Requirements
(1) Each manufacturer that provides glazing materials, intended
by the manufacturer for use in achieving compliance with the
requirements of this part, shall certify that each type of glazing
material being supplied for this purpose has been succcessfully
tested in accordance with this appendix and that test verification
data is available to a railroad or to FRA upon request.
(2) The test verification data shall contain all pertinent
original data logs and documentation that the selection of material
samples, test set-ups, test measuring devices, and test procedures
were performed by qualified personnel using recognized and
acceptable practices and in accordance with this appendix.
b. Testing Requirements
(1) The material to be tested (Target Material) shall be a full
scale sample of the largest dimension intended to be produced and
installed.
(2) The Target Material shall be representative of production
material and shall be selected on a documented random choice
basis.
(3) The Target Material shall be securely and rigidly attached
in a fixture so that the fixture's own characteristics will not
induce test errors.
(4) The Target Material so selected and attached shall
constitute a Test Specimen.
(5) The Test Specimen will then be equipped with a Witness Plate
that shall be mounted parallel to and at a distance of six inches
in back of the Target Material. The Witness Plate shall have at
least an area which will cover the full map of the Target
Material.
(6) The Witness Plate shall be an unbacked sheet of maximum
0.006 inch, alloy 1100 temper O, aluminum stretched within the
perimeter of a suitable frame to provide a taut surface.
(7) The Test Specimen will be positioned so that the defined
projectile impacts it at an angle of 90 degrees to the Test
Specimen surface.
(8) The point of impact of the defined projectile will be within
a radius of 3″ of the centroid of the Target Material.
(9) Velocity screens or other suitable velocity measuring
devices will be positioned so as to measure the impact velocity of
the defined projectile within a 10% accuracy tolerance, with test
modifications made to guarantee that the stipulated minimum
velocity requirements are met.
(10) The Test Specimen for glazing material that is intended for
use in end facing glazing locations shall be subjected to a Type I
test regimen consisting of the following tests:
(i) Ballistic Impact in which a standard 22 caliber long rifle
lead bullet of 40 grains in weight impacts at a minimum of 960 feet
per second velocity.
(ii) Large Object Impact in which a cinder block of 24 lbs
minimum weight with dimensions of 8 inches by 8 inches by 16 inches
nominally impacts at the corner of the block at a minimum of 44
feet per second velocity. The cinder block must be of composition
referenced in American Society for Testing and Materials (ASTM)
Specification C33L or ASTM C90.
(11) The Test Specimen for glazing material that is intended for
use only in side facing glazing locations shall be subjected to a
Type II test regimen consisting of the following tests:
(i) Ballistic Impact in which a standard 22 caliber long rifle
lead bullet of 40 grains in weight impacts at a minimum of 960 feet
per second velocity.
(ii) Large Object Impact in which a cinder block of 24 lbs
minimum weight with dimensions of 8 inches by 8 inches by 16 inches
nominally impacts at the corner of the block at a minimum of 12
feet per second velocity. The cinder block must be of the
composition referenced in ASTM C33L or ASTM C90.
(12) Three different test specimens must be subjected to the
ballistic impact portion of these tests.
(13) Two different test specimens must be subjected to the large
object impact portion of these tests.
(14) A material so tested must perform so that:
(i) there shall be no penetration of the back surfaces (side
closest to Witness Plate) of the Target Material by the projectile.
Partial penetration of the impact (front) surface of the Target
Material does not constitute a failure; and
(ii) there shall be no penetration of particles from the back
side of the Target Material through the back side of the prescribed
Witness Plate.
(15) Test specimens must consecutively pass the required number
of tests at the required minimum velocities. Individual tests
resulting in failures at greater than the required minimum
velocities may be repeated but a failure of an individual test at
less than the minimum velocity shall result in termination of the
total test and failure of the material.
(16) After successful completion of the prescribed set of
required consecutive tests, a manufacturer may certify in writing
that a particular glazing material meets the requirements of these
standards.
c. Material Identification
(1) Each individual unit of glazing material shall be
permanently marked, prior to installation, to indicate that this
type of material has been successfully tested as set forth in this
appendix and that marking shall be done in such a manner that it is
clearly visible after the material has been installed.
(2) Each individual unit of a glazing material that has
successfully passed the Type I testing regimen shall be marked to
indicate:
(i) “FRA Type I” material;
(ii) the manufacturer of the material;
(iii) the type or brand identification of the material.
(3) Each individual unit of a glazing material that has
successfully passed the Type II testing regimen shall be marked to
indicate:
(i) “FRA Type II” material;
(ii) the manufacturer of the material;
(iii) the type or brand identification of the material.