ASTM D4956-01a

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: D 4956 – 01a
Standard Specification for
1
Retroreflective Sheeting for Traffic Control
This standard is issued under the fixed designation D4956; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
4
1. Scope surement by Tristimulus (Filter) Colorimetry
E1349 Test Method for Reflectance Factor and Color by
1.1 This specification covers flexible, non-exposed glass
4
Spectrophotometry Using Bidirectional Geometry
beadlensandmicroprismatic,retroreflectivesheetingdesigned
G7 Practice for Atmospheric Environmental Exposure
for use on traffic control signs, delineators, barricades, and
5
Testing of Nonmetallic Materials
other devices.
G147 Practice for Conditioning and Handling of Nonme-
1.2 The values stated in inch-pound units are to be regarded
5
tallicMaterialsforNaturalandArtificialWeatheringTests
as the standard. The values given in parentheses are for
G151 Practice for Exposing Nonmetallic Materials in Ac-
information only.
5
celeratedTest Devices that Use Laboratory Light Sources
1.3 The following safety hazards caveat pertains only to the
G152 PracticeforOperatingOpenFlameCarbonArcLight
test methods portion, Section 7, of this specification. This
5
Apparatus for Exposure of Nonmetallic Materials
standard does not purport to address all of the safety concerns,
G153 Practice for Operating Enclosed Carbon Arc Light
if any, associated with its use. It is the responsibility of the user
5
Apparatus for Exposure of Nonmetallic Materials
of this standard to establish appropriate safety and health
2.2 Federal Specifications:
practices and determine the applicability of regulatory limita-
FP-92 Standard Specifications for Construction of Roads
tions prior to use.
6
and Bridges on Federal Highway Projects
2. Referenced Documents
L-S-300C Federal Specification for Sheeting and Tape,
7
Reflective: Non Exposed Lens
2.1 ASTM Standards:
2.3 AASHTO Specification:
B209 Specification for Aluminum and Aluminum-Alloy
8
2
M 268-00 I
Sheet and Plate
B209M Specification for Aluminum and Aluminum-Alloy
3. Terminology
2
Sheet and Plate [Metric]
3
3.1 Definitions—Definitions of terms are as described in
B449 Specification for Chromates on Aluminum
4 Terminology E284E284 and Practice E808E808.
D523 Test Method for Specular Gloss
4
3.2 Definitions of Terms Specific to This Standard:
E284 Terminology of Appearance
3.2.1 reboundable sheeting, n—retroreflective material in-
E308 Practice for Computing the Colors of Objects by
4
tended to be attached to flexible impact resistant plastic
Using the CIE System
4 devices, such as traffic drum-like channelizing devices.
E808 Practice for Describing Retroreflection
E810 Test Method for Coefficient of Retroreflection or
4. Classification
4
Retroreflective Sheeting
4.1 Retroreflective sheeting shall consist of a white or
E 991 Practice for Color Measurement of Fluorescent
4 colored sheeting having a smooth outer surface and that
Specimens
essentially has the property of a retroreflector over its entire
E1164 Practice for Obtaining Spectrophotometric Data for
4
surface. There are nine types and five classes of retroreflective
Object-Color Evaluation
sheeting. Types are determined by conformance to the retrore-
E1347 Test Method for Color and Color-Difference Mea-
flectance, color, and durability requirements listed in 6.1 and
1
This specification is under the jurisdiction ofASTM Committee D04 on Road
5
and Paving Materials and is the direct responsibility of Subcommittee D04.38 on Annual Book of ASTM Standards, Vol 14.04.
6
Highway Traffic Control Materials. Available from Superintendent of Documents, U.S. Government Printing
Current edition approvedAug. 10, 2001. Published September 2001. Originally Office, Washington, DC 20402.
7
published as D4956–89. Last previous edition D4956–01. AvailablefromGeneralServicesAdministration,470EastL’EnfantPlazaS.W.,
2
Annual Book of ASTM Standards, Vol 02.02. Suite 8100, Washington, DC 20407.
3 8
Annual Book of ASTM Standards, Vol 02.05. Available from theAmericanAssociation of State Highway andTransportation
4
Annual Book of ASTM Standards, Vol 06.01. Officials, 444 N. Capitol St., N.W., Washington, DC 20001.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
D 4956 – 01a
A
TABLE 1 Type VII Shee
...