ASTM C1349-17(2024)
(Specification)Standard Specification for Architectural Flat Glass Clad Polycarbonate
Standard Specification for Architectural Flat Glass Clad Polycarbonate
ABSTRACT
This specification covers the quality requirements for cut sizes of architectural flat glass clad polycarbonate (GCP) for use in buildings as security, detention, hurricane/cyclic wind-resistant, and blast and ballistic-resistant glazing applications. Architectural polycarbonates furnished under this specification shall be of the following kinds: Kind GCP, single core (SC); Kind GCP, multiple core (MC); and Kind GCP, others (O). The polycarbonates shall be examined by means of the following: security test; impact test for safety glazing; missile impact and cyclic pressure test; security glazing test; airblast loading test; detention glazing test; bullet resisting glazing test; burglary resisting test; visual inspection; and transmittance test. The materials shall also adhere to specified size and dimensional requirements, and maximum allowable blemishes in form of bubbles, edge boil blow-ins, fuses, single strand lint hairs, inside dirt spots, areas of concentrated lint, delamination and discoloration, short interlayer and unlaminated area chips, streaks and scuffs, white scratches, carbon specks, and crizzles.
SCOPE
1.1 This specification covers the quality requirements for cut sizes of glass clad polycarbonate (GCP) for use in buildings as security, detention, hurricane/cyclic wind-resistant, blast and ballistic-resistant glazing applications.
1.2 Optical distortion and the evaluation thereof are not currently within the scope of the standard. Mockups are recommended as a method to evaluate glass. (See Appendix X3.)
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard 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 standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1349 − 17 (Reapproved 2024)
Standard Specification for
Architectural Flat Glass Clad Polycarbonate
This standard is issued under the fixed designation C1349; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C1048 Specification for Heat-Strengthened and Fully Tem-
pered Flat Glass
1.1 This specification covers the quality requirements for
C1172 Specification for Laminated Architectural Flat Glass
cut sizes of glass clad polycarbonate (GCP) for use in buildings
C1376 Specification for Pyrolytic and Vacuum Deposition
as security, detention, hurricane/cyclic wind-resistant, blast and
Coatings on Flat Glass
ballistic-resistant glazing applications.
C1422 Specification for Chemically Strengthened Flat Glass
1.2 Optical distortion and the evaluation thereof are not
C1503 Specification for Silvered Flat Glass Mirror
currently within the scope of the standard. Mockups are
D256 Test Methods for Determining the Izod Pendulum
recommended as a method to evaluate glass. (See Appendix
Impact Resistance of Plastics
X3.)
D543 Practices for Evaluating the Resistance of Plastics to
1.3 The values stated in inch-pound units are to be regarded
Chemical Reagents
as the standard. The values given in parentheses are for
D635 Test Method for Rate of Burning and/or Extent and
information only.
Time of Burning of Plastics in a Horizontal Position
D638 Test Method for Tensile Properties of Plastics
1.4 This standard does not purport to address all of the
D648 Test Method for Deflection Temperature of Plastics
safety concerns, if any, associated with its use. It is the
Under Flexural Load in the Edgewise Position
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- D790 Test Methods for Flexural Properties of Unreinforced
and Reinforced Plastics and Electrical Insulating Materi-
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor- als
dance with internationally recognized principles on standard- D792 Test Methods for Density and Specific Gravity (Rela-
ization established in the Decision on Principles for the tive Density) of Plastics by Displacement
Development of International Standards, Guides and Recom-
D1003 Test Method for Haze and Luminous Transmittance
mendations issued by the World Trade Organization Technical
of Transparent Plastics
Barriers to Trade (TBT) Committee.
D1005 Test Method for Measurement of Dry-Film Thick-
ness of Organic Coatings Using Micrometers
2. Referenced Documents
D1044 Test Method for Resistance of Transparent Plastics to
Surface Abrasion by the Taber Abraser
2.1 Reference to these documents shall be the latest revision
unless otherwise specified by the authority applying this D3763 Test Method for High Speed Puncture Properties of
Plastics Using Load and Displacement Sensors
specification.
2 E308 Practice for Computing the Colors of Objects by Using
2.2 ASTM Standards:
the CIE System
C162 Terminology of Glass and Glass Products
E1886 Test Method for Performance of Exterior Windows,
C1036 Specification for Flat Glass
Curtain Walls, Doors, and Impact Protective Systems
Impacted by Missile(s) and Exposed to Cyclic Pressure
This specification is under the jurisdiction of ASTM Committee C14 on Glass Differentials
and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat
E1996 Specification for Performance of Exterior Windows,
Glass.
Curtain Walls, Doors, and Impact Protective Systems
Current edition approved Feb. 1, 2024. Published February 2024. Originally
Impacted by Windborne Debris in Hurricanes
approved in 1996. Last previous edition approved in 2017 as C1349 – 17. DOI:
10.1520/C1349-17R24.
F1233 Test Method for Security Glazing Materials And
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Systems
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
F1642 Test Method for Glazing and Glazing Systems Sub-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ject to Airblast Loadings
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1349 − 17 (2024)
F1915 Test Methods for Glazing for Detention Facilities 3.2.16 flammability rating—the rate of burn; a CC-1 rating
2.3 ANSI Standard: is based on a rate of burn less than one in./min.
Z97.1 Safety Glazing Materials Used in Buildings—Safety
3.2.17 flexural modulus—the stiffness/rigidity of a material
Performance Specifications and Methods of Tests
as determined by bending the material at stresses less than that
2.4 Federal Document:
required to produce permanent deformation.
CPSC 16 CFR 1201 Consumer Product Safety Commission
3.2.18 fuse—see adhesion chips.
Safety Standard for Architectural Glazing Materials
3.2.19 glass clad polycarbonate (GCP)—one or more lites
2.5 UL Standards
of flat glass bonded with an aliphatic urethane interlayer to one
UL 752 Standard for Bullet Resisting Materials
or more sheets of extruded polycarbonate in a pressure/
UL 972 Standard for Burglary Resisting Glazing Materials
temperature/vacuum laminating process.
3. Terminology
3.2.20 hair—a slender, pigmented filament from human or
3.1 Definitions:
animal epidermis or other thread-like filament.
3.1.1 Refer to the terminology in the ASTM standards
3.2.21 haze—the percentage of transmitted light that, in
referenced in 2.2, as appropriate.
passing through a specimen, deviates from incident beam by
3.1.2 blemishes in flat glass—refer to Specification C1036,
forward scattering.
as appropriate.
3.2.22 inside dirt—foreign material trapped inside the lami-
3.1.3 blemishes in polycarbonate—refer to Appendix X1.
nate.
3.2 Definitions of Terms Specific to This Standard:
3.2.23 instrumented dart—a test evaluating the puncture
3.2.1 adhesion chips—glass particles or crystalline material
properties of plastics over a range of test velocities.
that is permanently bonded to the surface of a lite.
3.2.24 interlayer—a layer or multiple layers of material
3.2.2 aliphatic polyether urethane—a thermoplastic inter-
acting as an adhesive between lites of glass which add(s)
layer required to bond polycarbonate lite to polycarbonate or to
additional performance to the finished product, for example,
glass.
impact resistance, solar control, acoustical insulation, color,
3.2.3 asymmetrical construction—see non-symmetrical.
design, or combinations thereof.
3.2.4 blow-in—a separation of glass or polycarbonate and
3.2.25 izod milled notch—a test evaluating the resistance of
interlayer at or close to the laminate edge.
plastics to breakage by flexural shock. The notch in the izod
3.2.5 boil (bubble)—a gas pocket in the interlayer material
specimen serves to concentrate the stress, minimize plastic
or between the glass or polycarbonate and the interlayer. deformation, and direct the fracture to the part of the specimen
behind the notch.
3.2.6 bond—adhesion of the glass or polycarbonate ply to
the interlayer.
3.2.26 laminate—see glass clad polycarbonate.
3.2.7 bow—a curve, bend, or other deviation from flatness.
3.2.27 lint—short fibers of yarn or fabric trapped within the
laminate.
3.2.8 carbon specks—flakes of carbon inherent in the manu-
facturing and extrusion of polycarbonate sheets.
3.2.28 lite (or light)—a panel or sheet of glass or a panel or
sheet of glass clad polycarbonate.
3.2.9 crizzle—an imperfection in the form of a multitude of
fine surface fractures (also known as “crazing”).
3.2.29 mismatch—misalignment of the edges of two or
3.2.10 deflection temperature—the softening temperature as more plies of glass or polycarbonate.
determined by applying heat and load to a material.
3.2.30 non-symmetrical—an assembly for which the thick-
3.2.11 delamination—a condition in which one or more of
ness and types of glass, polycarbonate, and interlayer are not
the lites of glass or polycarbonate loses the bond between the
the same about the thickness center.
glass or polycarbonate lite and the interlayer.
3.2.31 offset—glass lites that are intentionally not aligned in
3.2.12 discoloration—a visibly noticeable color change
a laminate.
(from original) in the appearance of a material.
3.2.32 ply—one sheet or panel of glass or polycarbonate in
3.2.13 distortion—the inability to see an image clearly; the
a laminate.
image is twisted out of natural shape.
3.2.33 PVB—a polyvinyl butyral interlayer used to bond
3.2.14 edge boil—see boil.
glass to glass.
3.2.15 elongation—the increase in length of a material that
3.2.34 scratch—damage on a glass or polycarbonate surface
has been stretched.
in the form of a line caused by the relative movement of an
object across and in contact with the surface.
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
3.2.35 scuff—see streak.
4th Floor, New York, NY 10036.
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, 3.2.36 separation—see delamination.
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
3.2.37 short interlayer—a condition of the laminate in
Available from Underwriters Laboratories (UL), Corporate Progress, 333
Pfingsten Rd., Northbrook, IL 60062. which the interlayer does not extend to the edge.
C1349 − 17 (2024)
3.2.38 specific gravity—the ratio of a given volume of a 5.1.4 Overall nominal thickness of the GCP, including the
material to the weight of an equal volume of water at standard nominal thickness and treatment of glass plies and the nominal
conditions. thicknesses of the polycarbonate and interlayer material;
5.1.5 Nominal length and width of the GCP;
3.2.39 streak—a noticeably visible directional blemish or
5.1.6 Blueprint, drawing, template, orientation, or other
discoloration on or in the laminated unit.
information useful to the manufacturer regarding installation of
3.2.40 surfaces—surfaces of glass and polycarbonate faces
the product;
are counted from the exterior (threat) to the interior (protected).
5.1.7 Color or tint of the GCP laminate (tinted glass,
If a laminate of glass-interlayer-polycarbonate-interlayer glass
interlayer, polycarbonate, or combinations);
is used as an example, the No. 1 surface is the surface that is
5.1.8 Required minimum visible light transmittance of the
to the exterior; the Nos. 2 and 3 surfaces are the next glass and
laminate;
polycarbonate surfaces, respectively, separated by and bonded
5.1.9 Mockup requirements (see 8.6—Flatness, Table 1, and
to the interlayer material; the Nos. 4 and 5 surfaces are the
Appendix X3);
following polycarbonate and glass surfaces, respectively, that
5.1.10 Security and safety standards or regulations to which
are separated by and bonded to the interlayer; the No. 6 surface
the laminate must conform (see 7.1 – 7.8);
is the surface that is to the interior.
5.1.11 Schedule requirements; and
3.2.41 symmetrical—an assembly for which the thickness 5.1.12 All other standards to which the laminate must
conform.
and types of glass, polycarbonate, and interlayers are the same
about the thickness center.
5.2 Packaging Requirements—Glass and polycarbonate
3.2.42 tabor abrasion—a measure of the effect of a specific packaging and protection will be standard manufacturer’s
type of abrasion; the change in percent haze is measured for practices unless otherwise specified. Consult manufacturers
transparent materials, and weight loss is measured for opaque before specifying.
materials.
6. Other Requirements
3.2.43 template—a pattern used as a guide to define the
6.1 Annealed glass plies should conform to the require-
overall size and shape of a cut lite.
ments of Specification C1036.
3.2.44 tensile strength—the load that causes a material to
6.2 Heat-strengthened or fully tempered glass plies shall
break during elongation/stretching.
conform to the requirements of Specification C1048.
3.2.45 unlaminated area—an area of the glass clad polycar-
bonate that failed to laminate during the laminating process. 6.3 Pyrolytic and vacuum deposition coated glass plies shall
This blemish is discernible due to the textured appearance of conform to the requirements of Specification C1376.
the interlayer material.
6.4 Chemically strengthened glass plies shall conform to the
requirements of Specification C1422.
4. Classification
6.5 Silvered mirror glass plies shall conform to the require-
4.1 Kinds—Glass clad polycarbonate furnished under this
ments of Specification C1503.
specification shall be of the following kinds, as specified:
6.6 Polycarbonate sheets shall conform to the requirements
4.1.1 Kind GCP, Single Core (SC)—Glass clad polycarbon-
of Appendix X1.
ate consisting of one or more lites of flat glass bonded with an
6.7 The aliphatic polyether urethane interlayer shall con-
aliphatic urethane interlayer to one sheet (single core) of
form to the requirements of Appendix X2.
polycarbonate in a pressure/temperature/vacuum laminating
process.
6.8 The polyvinyl butyral interlayer shall conform to the
4.1.2 Kind GCP, Multiple Core (MC)—Glass clad polycar-
manufacturer’s specifications.
bonate consisting of one or more lites of flat glass bonded with
an aliphatic urethane interlayer to more than one sheet (mul-
tiple core) of polycarbonate in a pressure/temperature/vacuum
ABC
TABLE 1 Maximum Allowable Overall Bow
laminating process.
Longest Edge Dimension, Maximum Allowable Bow
4.1.3 Kind GCP, Others (O)—glass clad polycarbonate con-
in. (mm) in. (mm)
structions not covered by 4.1.1 or 4.1.2.
0 to 18 (0 to 460) ⁄32 (2.4)
Over 18 to 36 (over 460 to 910) ⁄16 (4.8)
Over 36 to 48 (over 910 to 1220) ⁄4 (6.4)
5. Ordering Information
Over 48 to 60 (over 1220 to 1520) ⁄16 (7.9)
5.1 Procurement Information—Purchasers should select the Over 60 to 96 (over 1520 to 2440) ⁄2 (12.5)
A
applicable options permitted in this section and include the
The above table is for GCP of any overall thickness having glass on both sides.
B
For GCP with glass on both sides in a strip condition or for GCP with glass on one
following information in procurement documents:
side and exposed polycarbonate on the opposing side in a nonstrip condition, the
5.1.1 Title, number, and date of this specification;
overall bow and warp is to be multiplied by 1.5. Strip condition is defined as a GCP
product with a long side to short s
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