Laminating Division Specification No. GANA LD 101-08
Standard Specification for Ball Drop Impact
Resistance of Laminated Architectural Flat Glazing
1. Scope
1.1 This specification covers the destructive
ball drop testing of laminated flat glass products intended for
use in architectural glazing applications.
1.2 This specification is intended for use as
an in-plant quality control test to evaluate the impact
performance of laminated flat glass when a 2270 g, 83 mm
diameter (5 lb., 3.25 in. diameter) smooth solid steel ball is
dropped from a specified height.
1.3 This specification does not yield data
that is a substitute for safety glazing test requirements of
ANSI Z97.1 or CPSC 16 CFR 1201. Qualification under this
specification provides a basis for judgment of the ability of
specimens to withstand the appropriate shot-bag impact. This
specification provides a mechanism to allow fabricators a less
cumbersome and lower cost method for the evaluation of impact
performance that may be performed on a frequent basis while
reducing the amount of waste materials generated from
traditional impact tests.
1.4 This specification is applicable to
symmetrical and asymmetrical annealed, heat-strengthened,
chemically strengthened, and fully tempered laminated
architectural flat glass including but not limited to: float,
patterned, sheet, sand-blasted, grooved and fritted.
1.5 The dimensional values stated in metric
units are to be regarded as the standard. The inch-pound units
given in parentheses are for information only.
1.6 This specification does not purport to
address all of the safety concerns, if any, associated with its
use. It is the responsibility of the user of this specification
to establish appropriate safety and health practices and to
determine the applicability of state and local building codes
and other regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards
C 162 Terminology of Glass and Glass
Products
C 1036 Standard Specification for Flat Glass
C 1048 Standard Specification for Heat-Treated Flat Glass
– Kind HS, Kind FT Coated and Uncoated
C 1172 Standard Specification for Laminated Architectural
Flat Glass
C 1422 Standard Specification for Chemically Strengthened
Flat Glass
E 631 Standard Terminology of Building Constructions
2.2 ANSI Standards
Z26.1 American National Standard for
Safety Glazing Materials for Glazing Motor Vehicles and
Motor Vehicle Equipment Operating on Land Highways – Safety
Standard
Z97.1 American National Standard for Safety Glazing
Materials Used in Buildings – Safety Performance
Specification and Methods of Test
2.3 Other Documents
CPSC 16 CFR 1201 United States Consumer
Product Safety Commission, Safety Standard for Architectural
Glazing Materials
GANA LD-100-06 Glass Association of North America,
Laminating Division
Standard Test Method for Ball Drop Impact of Laminated
Architectural Flat Glass
2.4 Terminology
2.4.1 For definition of terms used in this
test method, refer to Terminology ASTM C 162 and ASTM E 631.
2.5 Definitions
2.5.1 Symmetrical: a term used to describe the
construction of a laminate comprised of only one glass type and
thickness. An example of a symmetrical construction is: 3 mm
(1/8 in.) annealed glass – 0.76 mm (0.030 in.) PVB interlayer –
3 mm (1/8 in.) annealed glass. Note: A color difference in the
glass plies is permitted.
2.5.2 Asymmetrical: a term used to describe
the construction of a laminate comprised of dissimilar glass
types and/or thickness. An example of an asymmetrical
construction is: 3 mm (1/8 in.) annealed glass – 0.76 mm (0.030
in.) PVB interlayer – 6 mm (1/4 in.) annealed glass.
2.5.3 Two (2)-ply glass laminates: A
manufactured assembly consisting of two sheets of glass bonded
together with an interlayer to at least one other sheet of
glass.
2.5.4 Glass/plastic laminates: A manufactured
assembly consisting of one layer of glass and one layer of
plastic glazing sheet material bonded together with interlayer.
2.5.5 Two (2)-ply plastic laminates: A
manufactured assembly consisting of two sheets of plastic bonded
together with an interlayer to at least one other sheet of
plastic.
2.5.6 Multi-ply laminates: A laminated glazing
consisting of more than two layers of glass and/or plastic
glazing sheet material bonded together by interlayers.
2.5.7 Organic-coated glass: A manufactured
assembly consisting of a sheet of glass covered on one or both
surfaces with either: (1) an adhesive-applied organic film or
sheeting, or (2) an applied coating.
