ISO/DIS 15082

Road vehicles -- Tests for rigid plastic safety glazing materials

Véhicules routiers -- Essais pour les vitrages de sécurité rigides en matières plastiques

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 15082
ISO/TC 22/SC 11 Secretariat: ANSI
Voting begins on: Voting terminates on:
2014-10-28 2015-01-28
Road vehicles — Tests for rigid plastic safety glazing
materials

Véhicules routiers — Essais pour les vitrages de sécurité rigides en matières plastiques

ICS: 43.040.65;83.140.01
THIS DOCUMENT IS A DRAFT CIRCULATED
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THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 15082:2014(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2014
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ISO/DIS 15082:2014(E)
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ii © ISO 2014 – All rights reserved
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ISO 15082:1999(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO

member bodies). The work of preparing International Standards is normally carried out through ISO technical

committees. Each member body interested in a subject for which a technical committee has been established has

the right to be represented on that committee. International organizations, governmental and non-governmental, in

liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical

Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.

Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard ISO 15082 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee

SC 11, Safety glazing materials.
Annexes A, B, D, E of this International Standard are for information only.
© ISO 1999

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic

or mechanical, including photocopying and microfilm, without permission in writing from the publisher.

International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
Printed in Switzerland
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INTERNATIONAL STANDARD © ISO ISO 15082:1999(E)
Road vehicles — Tests for rigid plastic safety glazing materials
1 Scope

This International Standard specifies all test methods relating to the safety requirements for rigid plastic safety

glazing materials in a road vehicle, regardless of the type of plastic of which they are composed.

NOTE Plastic safety glazing materials are classified as rigid or flexible by use of the test described in Annex A.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of

this International Standard. For dated references, subsequent amendments to, or revisions of, any of these

publications do not apply. However, parties to agreements based on this International Standard are encouraged to

investigate the possibility of applying the most recent editions of the normative documents indicated below. For

undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC

maintain registers of currently valid International Standards.

ISO 48:1994, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and

100 IRHD).
ISO 3536:1999, Road vehicles — Safety glazing materials — Vocabulary.

ISO 3538:1997, Road vehicles — Safety glazing materials — Test methods for optical properties.

ISO 3795:1989 Road vehicles, and tractors and machinery for agriculture and forestry — Determination of burning

behaviour of interior materials

ISO 3917:1999, Road vehicles — Safety glazing materials — Test methods for resistance to radiation, high

temperature, humidity, fire and simulated weathering.

ISO 4892-2:1994, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc sources.

ISO 20566:2006, Paint and varnishes – Determination of the scratch resistance of a coating system using a

laboratory car-wash

ISO 5725-2 :2002, Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method

for the determination of repeatability and reproducibility of a standard measurement method (ISO 5725-2:1994

including Technical Corrigendum 1:2002)
3 Terms and definitions

For the purposes of this International Standard, the terms and definitions given in ISO 3536 apply.

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© ISO
ISO 15082:1999(E)
4 Test conditions

Unless otherwise specified, the tests shall be carried out under the following conditions:

 ambient temperature: 20 °C ± 5 °C;
 atmospheric pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar);
 relative humidity: (60 ± 20) %.
5 Conditioning of test specimens

Unless otherwise specified, all test specimens to be tested shall be conditioned prior to testing under the following

conditions and for the following periods of time:
 ambient temperature: 23 °C ± 2 °C for at least 48 h;
 ambient relative humidity: (50 ± 5) % for at least 48 h;
 low temperature: –18 °C ± 2 °C for at least 24 h.
6 Application of tests

For certain types of safety glazing material, it is not necessary to carry out all the tests specified in this International

Standard.
7 Optical properties test
Test plastic safety glazing materials in accordance with ISO 3538.
8 Head-form/fragmentation test
8.1 Principle

Determine the fragmentation characteristics of plastic safety glazing materials at ambient temperature.

8.2 Apparatus

8.2.1 Head-form weight, with a spherical or semi-spherical head made of laminated hardwood covered with

replaceable felt and with or without a cross- beam made of wood. Between the spherical part and the cross-beam,

there is a neck shaped intermediate piece and on the other side of the cross-beam, a mounting rod.

The dimensions shall be in accordance with Figure 1.
The total mass of the apparatus shall be 10 kg ± 0,2 kg.
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© ISO
ISO 15082:1999(E)
Dimensions in millimetres
Key
1 Mounting rod
2 Intermediate piece
3 Cross-beam (optional)
4 Head
5 Felt cover 5 mm thick
Figure 1 — Head-form weight

8.2.2 Means for dropping the head-form weight freely from a height to be specified, or means for giving the

weight a velocity equivalent to that obtained by the free fall.

When a device to project the head-form weight is used, the tolerance on velocity shall be ± 1 % of the velocity

equivalent to that obtained by the free fall.

8.2.3 Supporting fixture, as shown in Figure 2, for testing flat test specimens. The fixture is composed of two

steel frames, with 50 mm wide machined edges, fitting one over the other and faced with rubber gaskets about 3

mm thick, and 15 mm ± 1 mm wide, of hardness 70 IRHD, measured in accordance with ISO 48. The upper frame

is pressed against the lower frame by at least eight bolts; the minimum recommended torque for M20 bolts is 30

Nm. Alternatively, other pressing techniques may be used, e.g. hydraulic or pneumatic pressing. (Reference to

Paragraph 8.4)
8.3 Test specimens
+5 +5

Test specimens shall be flat rectangles with length 1 100 mm mm and width 500 mm mm.

−2 −2
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© ISO
ISO 15082:1999(E)
Dimensions in millimetres
Key
1 Rubber gasket
2 Bolt
Figure 2 — Support for head-form tests
8.4 Procedure

Place a conditioned test specimen in the supporting fixture (Figure 2); the torque on the bolts, or the amount of

hydraulic or pneumatic pressure, shall ensure that the movement of the test specimen during the test will not

exceed 2 mm. The plane of the test specimen shall be substantially perpendicular to the incident direction of the

head-form weight.

The head-form weight shall strike the test specimen, from a height to be specified, within 40 mm of its centre on

that face which represents the inside face of the plastic safety glazing material when mounted on the vehicle, and

shall be allowed to make only one impact.
The felt cover shall be replaced after 12 tests, or when damaged.
8.5 Expression of results

Evaluate the fracture characteristics of the plastic safety glazing material by recording whether the test specimen

did not break and the head-form was supported, or the test specimen broke and the head-form was supported, or

the test specimen broke and the head-form was not supported. Record the drop height for each impact test.

In the event of fracture, evaluate the plastic safety glazing material by recording the smallest angle between two

adjacent sides of resulting fragments and the area, longest dimension, and weight of the largest fragment. Record

this data for the fragments remaining in the supporting fixture and for those that are dislodged from the supporting

fixture.
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© ISO
ISO 15082:1999(E)
9 Head-form test with deceleration measurement
9.1 Principle

Assessment of the minimum strength and fragmentation characteristics of plastic safety glazing materials under

impact from a blunt, bulky object at ambient temperature. The danger of skull-brain-injuries is assessed by

simultaneous determination of the HIC (head injury criterion)-values.
Tests can be performed on flat specimens or on complete panes.
9.2 Test conditions

Unless otherwise specified, the test shall be carried out under the following conditions:

 ambient temperature: 20°C ± 5°C;
 atmospheric pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar);
 relative humidity: (60 ± 20) %.
9.3 Conditioning of test pieces

Unless otherwise specified, the test pieces to be tested shall be conditioned prior to testing under the following

conditions and for the following periods of time:
 ambient temperature: 23°C ± 2°C for at least 48 h;
 ambient relative humidity: (50 ± 5) % for at least 48 h
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© ISO
ISO 15082:1999(E)
9.4 Apparatus

To perform the head-form test with deceleration measurement, a test apparatus according to Figure 3 can be used.

The head-form (Paragraph 9.4.1 and Figure 4) is fixed to the cross arm of the guide system and moved to the

required drop height by means of a lifting device. To start the drop test the cross arm with the head-form is

released. After passing the height-adjustable light barrier the head-form is released from the cross arm, the cross

arm’s fall is dampened and the head-form drops onto the test piece. Instead of the data transmission via cables,

wireless data transmission (e.g. radio transmission) may be used. In this case the guide system can be omitted

because of no risk of obstruction of the free vertical drop by any cables.
Figure 3 — Principal sketch of a test apparatus for the head-form test with
deceleration measurement
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© ISO
ISO 15082:1999(E)

9.4.1 Head-form weight: head-form (as shown in Figure 4 for data transmission via co-axial (BNC) cables)

with total mass of 10.0 kg +0.2/-0.0 kg, which allows the simultaneous determination of HIC-values. The

components of the head-form according to Figure 4 are listed in Table 1. In the middle of the base plate (24) the tri-

axial mounting block (26) is mounted in the centre of gravity to hold the acceleration gauges (27). The acceleration

gauges must be arranged vertically to each other.

The basin (18) and cover (19) situated under the base plate (24) share, to a great extent, the elastic properties of

the human skull. The elastic properties of the head-form on impact are determined by the hardness and the

thickness of the intermediate ring (13) and the basin.

If wireless data transmission is used instead of transmission via co-axial cables, it must be ensured that those

electronic components additionally installed in the head-form do not influence mass, gravity centre point and spring

force of the head-form. Those electronic components must be installed on the base plate (24) only. A mass

correction, if necessary, is also restricted to the base plate at that surface which faces the hollow space within the

head-form. If additional miniature components for controlling of the electronic modules are required (e.g. micro

switches, loading sockets for voltage supply), these may replace the co-axial cables. In this case the original holes

in the cover plate (29) and the protective cap (30) have to be used for the installation and wiring.

(1) Magnetic holding device
Vibration damper (2)
(30) Protective cap
HF connector BNC (3)
Hexagonal nut (4)
(29) Cover plate
Disc (5)
(28) Wood component
Transition piece (6)
Cylinder screw (7)
(27) Acceleration gauge
Hexagonal nut (8)
(26) Tri-axial
Disc (9)
mounting block
(25) Set screw with Rubber ring (10)
hexagon socket
Damping ring (11)
(22) Damping disc
Intermediate ring (13)
(24) Base plate
Guide tube (14)
Threaded bolt (16)
Hexagonal nut (15)
Basin
Counter sunk screw (21) (18)
Screwed insert (17)
Cover
Guide bush (20)
(19)
Figure 4 — 10 kg head-form

9.4.2 Measuring device – for recording and evaluation of the measured deceleration curves a (t), a (t) and

x y

(t), transmitted from the head-form acceleration gauges via cables or wireless: acceleration gauges, measuring

and recording instruments according to ISO 6487, channel-amplitude class CAC 5000 m/s² and channel-

frequency class CFC 1000Hz.
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© ISO
ISO 15082:1999(E)
Table 1: List of components for the 10 kg head-form shown in Figure 4
Position Number of
Standard notation Material Remarks
No. Pieces
1 1 Magnetic holding device Steel: EN10025-2-E295GC -
Diameter: 50 mm
2 1 Vibration damper Rubber / Steel Thickness: 30 mm
Thread: M10
Coupler-coupler
4 HF connector BNC -
(EN 122120)
Hexagonal nut
4 1 - -
ISO10511-M10-05
Disc
5 6 - -
ISO7090-6-200HV
Transition piece
3 - -
Pos.No. 3 – Pos.No. 27
Cylinder screw
7 6 - Torque about 12 Nm
ISO4762–M6x140–8.8
Hexagonal nut Torque about 4 Nm
8 3 -
ISO10511-M8-05 (ref. paragraph 9.5)
Hole diameter: 8 mm
9 3 Disc Steel EN10025-2-E295GC Outer diameter: 35 mm
Thickness: 1.5 mm
Hole diameter: 8 mm
Rubber, hardness 60 IRHD (ISO
10 3 Rubber ring Outer diameter: 30 mm
48)
Thickness: 10 mm
Hole diameter: 120 mm
11 1 Damping ring Gasket paper Outer diameter: 199 mm
Thickness: 0.5 mm
12 - - - -
Hole diameter: 129 mm
Butadiene-rubber, hardness about Outer diameter: 192 mm
13 1 Intermediate ring
60 IRHD (ISO 48) Thickness: about 6 mm
(ref. paragraph 9.5)
Inner diameter: 8 mm
14 3 Guide tube Polytetrafluoroethylene (PTFE) Outer diameter: 10 mm
Length: 40 mm
Hexagonal nut
15 3 - -
ISO10511-M8-05
Threaded bolt
16 3 - -
DIN976–1–M8x90–B–8.8
Cast alloy Dimensions M8 x 12
17 3 Screwed insert
EN1982-CuZn39Pb1Al-C-GP (DIN 7965)
18 1 Basin Polyamide 12 (ISO 1874-1) -
Thickness: 6 mm
19 1 Cover Butadiene-rubber
Rib on one side
20 1 Guide bush Steel EN10025-2-E295GC -
Counter sunk screw
21 4 - -
ISO2009–M5x10–5.8
Diameter: 65 mm
22 1 Damping disc Gasket paper
Thickness: 0.5 mm
23 - - - -
24 1 Base plate Steel EN10025-2-E295GC -
Set screw with hexagonal
25 1 Class of strength 45H (ISO 898-5) -
socket
26 1 Tri-axial mounting block - -
3 Acceleration gauge - ref. Paragraph 9.4.2
28 1 Wood component Hornbeam, glued in layers -
Alloy EN573-3 ; EN AW-5019
29 1 Cover plate -
(EN AW-AlMg5)
30 1 Protective cap Polyamide 12 (ISO 1874-1) -

1 These components are unnecessary in case of wireless data transmission. In this case other components

for data transmission are installed in the head-form (e.g. radio transmitter), ref. Paragraph 9.4.1.

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© ISO
ISO 15082:1999(E)

9.4.3 Supporting fixture for testing flat test specimens, as shown in Figure 5. The fixture is composed

of two steel frames, with machined edges, 50 mm wide, fitting one over the other and faced with rubber gaskets

about 3 mm thick, and 50 mm +1/-0 mm wide, of hardness 70 IRHD, determined in accordance with ISO 48. The

upper frame is pressed against the lower frame by at least eight bolts; the minimum recommended torque for

M20 bolts is 30 Nm. Alternatively, other pressing techniques may be used, e.g. hydraulic or pneumatic pressing

(ref. Paragraph 9.7).
Rubber Gasket Bolt
105
1070
1170
Dimensions in millimetres
Figure 5 — Support for tests on flat specimens

9.4.4 Supporting fixture for testing complete panes: The support shall consist of a rigid piece

corresponding to the shape of the pane so that the head-form weight faces the internal surface. The pane shall

be clamped to the supporting structure by means of appropriate devices, with interposed stripes of rubber of

hardness 70 IRHD, determined in accordance with ISO 48, and thickness of about 3 mm, the width of contact

over the whole perimeter being about 15 mm.
9.4.5 Equipment to calibrate the head-form

9.4.5.1 Drop appliance which must allow drop heights between 50 mm and 254 mm to be adjusted exactly to

within 1 mm. A guide system is not necessary for these small drop heights.

9.4.5.2 Impact plate made of steel, dimensions 600 mm x 600 mm, minimum thickness 50 mm, flatness

tolerance t = 0.05 mm, determined in accordance with ISO 1101.
9.5 Calibration procedure and adjustment of the head-form

Before each test series and no later than each 50 tests within a series, the head-form must be calibrated and

adjusted if necessary.

The impact plate must be clean and dry and must lie non-positively on a concrete base during the calibration

procedure. Alternatively the impact plate may be placed in a massive supporting device if this device is connected

to a concrete foundation.

The head-form is allowed to hit the impact plate vertically. The drop heights (measured from the lowest point of the

head-form to the surface of the impact plate) are 50, 100, 150 and 254 mm. The deceleration curves shall be

recorded.
Dashed line indicates centre line of rubber strip, centrally on support edge
470
570
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© ISO
ISO 15082:1999(E)

The greatest deceleration a from the various drop heights on the z-axis must lie within the limits given in Table 2.

Table 2: Greatest deceleration a on the z-axis which must be reached for calibration, depending on the

drop height.
Drop height Greatest deceleration a
m/s²
50 (82 ± 8) g
100 (128 ± 8) g
150 (167 ± 10) g
254 (227 ± 14) g

The deceleration curves must be based on a uni-modal oscillation. The deceleration curve of the drop height of 254

mm must run at least 1.5 ms and at most 2 ms over 100 g.

If the requirements given above are not met, the elastic properties of the head-form must be adjusted by varying

the thickness of the intermediate ring (13) of the base plate (24). Corrections can be carried out by adjusting the

three self-locking hexagonal nuts (8) on the threaded bolts (16) by which the basin (18) is fixed to the base plate

(24). The rubber rings (10) under the hexagonal nuts (8) must not be brittle or cracked.

The cover (19) of the impact surface and the intermediate ring (13) must be replaced if damaged; especially they

must always be replaced simultaneously if the head-form can no longer be adjusted.

9.6 Test Pieces: Flat test specimens (1170 mm +0/-2 mm x 570 mm +0/-2 mm) or complete panes shall be

subjected to testing.

9.7 Test Procedure: In case of flat test specimens, fix the specimen in the supporting frames (Paragraph

9.4.3). In case of tests on complete panes, clamp the pane to a support which has a shape corresponding to the

pane (Paragraph 9.4.4).

The torque on the bolts respectively the amount of hydraulic or pneumatic pressure shall ensure that the movement

of an edge of the test piece during the test will not exceed 2 mm.

The plane of the test piece shall be substantially perpendicular to the incident direction of the weight. The head-

form weight shall strike the test piece within 40 mm of its geometric centre on that face which represents the inward

face of the safety glazing pane when the latter is mounted on the vehicle, and shall be allowed to make only one

impact.

In case of data transmission via co-axial cables, the head-form is fixed to the cross arm of the guide system (ref.

Figure3) and moved to the required drop height which depends on the desired impact velocity. In case of tests on

complete panes, drop heights between 1.5 m and 3 m are used if not specified otherwise. The cross arm which

carries the head-form is released. After passing the height-adjustable light barrier the head-form is released from

the cross arm, the cross arm’s drop is dampened and the head-form drops onto the test piece.

In case of wireless data transmission, the guide system can be omitted. The head-form is fixed directly to the upper

release device of the lifting unit and moved to the required drop height. The head-form is released and drops freely

onto the test piece.

No impulse may be given to the head-form by the drop appliance or by the data-transmission cables (if applicable),

so that it is accelerated only by gravity and drops freely and vertically.

The values of the greatest deceleration a are maximum values of the deceleration curves a (t), expressed in multiples of g

z z
(acceleration due to gravity: g = 9.81 m/s²).

The drop height is the distance between the lowest point of the head-form and the upper surface of the test piece.

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© ISO
ISO 15082:1999(E)

The deceleration curves occurring on impact on the test piece for a , a and a shall be recorded versus time t.

x y z

After the head-form weight has impacted the test piece, it shall be checked whether a glazing edge has moved

more than 2 mm in the support and whether the requirement for the point of impact was met. The acceleration

components a and a shall be smaller than 0.1 a for a vertical impact.
x y z
9.8 Evaluation
The deceleration curves shall be evaluated as follows:

The resulting deceleration a (t) in the centre of gravity shall be calculated according to equation (1) from the

res

measured deceleration curves a (t), a (t) and a (t) as multiple of the acceleration due to gravity g, expressed in

x y z
meters per square second (m/s²).
1/2
2 2 2
a (t) = (a (t) + a (t) + a (t))
res x y z
(1)

The period for which the deceleration a exceeds the value of 80 g continually, and the greatest value of a shall

res res

be determined. The HIC-value as a measure of the danger of blunt skull-brain-injuries shall be calculated

according to equation (2):
2.5
 
 
−1.5
   
(2) HIC = max f (t) = max (t − t ) a (t)dt
t ,t 2 1 res
1 2
 
 
 1 
 
with
max f (t) f (t)
maximum value of the function

point of time selected for the calculation as start point of the deceleration measurement, in

seconds;

point of time selected for the calculation as end point of the deceleration measurement, in seconds;

a resulting deceleration according to equation (1) as multiple of the acceleration due to gravity g,

res
expressed in meters per square second.

The integration limits t and t shall be selected in such a way that the function f(t)gets a maximum value.

1 2
9.9 Expression of results
Record the drop height for each impact test.

Evaluate the fracture characteristics of the plastic safety glazing material by recording whether the test piece did

not break and the head-form was supported, or the test piece broke and the head-form was supported, or the test

piece broke and the head-form was not supported. In the event of fracture, report if or not the piece broke into fully

separate large pieces.
Report the following numerical results:

 The period for which the resulting deceleration a exceeded the value of 80 g continually;

res
 the greatest value of the resulting deceleration a
res
 the HIC value
The unit of the HIC-value is defined as unit 1.
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© ISO
ISO 15082:1999(E)
10 227g ball test
10.1.1 Principle

Determination of whether the plastic safety glazing material has a certain minimum strength and cohesion under

impact from a small hard object at ambient and low temperatures.
10.1.2 Apparatus

10.1.2.1 Hardened steel ball, with a mass of 227 g ± 2 g and a diameter of approximately 38 mm.

10.1.2.2 Means for dropping the ball freely from a height to be specified, or means for giving the ball a velocity

equivalent to that obtained by the free fall.

When a device to project the ball is used, the tolerance on velocity shall be ± 1 % of the velocity equivalent to that

obtained by the free fall.

10.1.2.3 Supporting fixture, such as that shown in Figure 6, composed of two steel frames with 15 mm wide

machined borders, fitting one over the other and faced with rubber gaskets about 3 mm thick and 15 mm wide, of

hardness 50 IRHD, determined in accordance with ISO 48.

The lower frame rests on a steel box, about 150 mm high. The test specimen is held in place by the upper frame,

the mass of which is about 3 kg. The supporting frame is welded on a sheet of steel about 12 mm thick, resting on

the floor, with an interposed sheet of rubber, about 3 mm thick, of hardness 50 IRHD measured in accordance with

ISO 48.
Dimensions in millimetres
Key
1 Test piece
2 Rubber gasket
3 Sheet of rubber
Figure 6 — Support for ball tests
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© ISO
ISO 15082:1999(E)
10.1.3 Test specimens
+10
Test specimens shall be flat squares with 300 mm mm sides.
10.1.4 Procedure

Place a conditioned test specimen in the supporting fixture and conduct the impact test at once. To minimize the

temperature change of the test specimen, the test should take place as quickly as possible (within 30 s of its

removal from the conditioning appliance). The plane of the test specimen shall be perpendicular, within 3°, to the

incident direction of the ball. When necessary to retain the test specimen in the fixture, it shall be clamped to

ensure that the movement of the test specimen during the test will not exceed 2 mm at any point along the inside

periphery of the fixture.

The point of impact shall be within 25 mm of the geometric centre of the test specimen for a drop height less than

or equal to 6 m, and within 50 mm of the geometric centre of the test specimen for a drop height greater than 6 m.

The ball shall strike the surface of the test specimen which represents the outside face of the plastic safety glazing

material when mounted on a vehicle and shall be allowed to make only one impact.
10.1.5 Expression of results

Evaluate the strength, type, and extent of damage to the test specimen. Record the drop height, and temperature

for each test specimen and whether the test specimen supported or did not support the 227 g ball.

10.2 2260 g ball test
10.2.1 Principle

Determination of whether the plastic safety glazing material has a certain minimum penetration resistance under

impact from a large hard object at ambient and low temperature.
10.2.2 Apparatus

10.2.2.1 Hardened steel ball, with a mass of 2 260 g ± 20 g and a diameter of approximately 82 mm.

10.2.2.2 Means for dropping the ball freely from a height to be specified, or means for giving the ball a

velocity equivalent to that obtained by the free fall.

When a device to project the ball is used, the tolerance on velocity shall be ± 1 % of the velocity equivalent to that

obtained by the free fall.

10.2.2.3 Supporting fixture, such as that shown in Figure 6 and specified in Paragraph 10.1.2.3.

10.2.3 Test specimens
+10

Test specimens shall be flat squares with 300 mm mm sides or shall be cut out from the flattes

...