ASTM C1824-16e1
(Test Method)Standard Test Method for Full Scale Bending Test of Spun Prestressed Concrete Bases for Tapered Steel Lighting Poles
Standard Test Method for Full Scale Bending Test of Spun Prestressed Concrete Bases for Tapered Steel Lighting Poles
SIGNIFICANCE AND USE
5.1 This test method is intended to provide the user with acceptable apparatus requirements and a prescribed procedure to determine the bending moment capacity of spun pre-stressed concrete bases for use with tapered steel poles.
5.2 The results of this test method are used as a basis for verification of calculated bending moment capacity, quality control tool for manufacturing process and as a basis for determining statistical bending moment capacity.
5.3 This test method shall not be used for full length prestressed concrete, steel, or composite poles.
SCOPE
1.1 This test method covers determination of ultimate bending moment capacity and cracking moment capacity of concrete bases used as foundations for tapered steel lighting poles in accordance to Specification C1804.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
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´1
Designation: C1824 − 16
Standard Test Method for
Full Scale Bending Test of Spun Prestressed Concrete
1
Bases for Tapered Steel Lighting Poles
This standard is issued under the fixed designation C1824; 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
ε NOTE—Editorial changes were made in March 2016.
1. Scope 3.1.3 ground line—is the distance from the butt end of the
base to the point where theoretical embedment in the founda-
1.1 This test method covers determination of ultimate bend-
tion is specified (theoretical buried depth).
ing moment capacity and cracking moment capacity of con-
3.1.4 second crack (re-cracking) load—the load at which a
crete bases used as foundations for tapered steel lighting poles
previously formed crack will reopen.
in accordance to Specification C1804.
3.1.5 spun base—a base in which the concrete is distributed
1.2 The values stated in inch-pound units are to be regarded
and compacted through centrifugal force.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3.1.6 tapered section—upper portion of base, which has a
and are not considered standard.
taper designed to match overlapping steel pole taper.
1.3 This standard does not purport to address all of the
3.1.7 ultimate load—maximum test load the base will carry
safety concerns, if any, associated with its use. It is the
in the specified direction before the steel or concrete will reach
responsibility of the user of this standard to establish appro-
its limiting state.
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use.
4.1 This test consists of applying transverse loads at a
2. Referenced Documents predetermined distance to simulate bending moments induced
by wind forces exerted on the spun concrete base. The base is
2.1 ASTM Standards:
tested in a horizontal orientation. The concrete base specimen
C39 Test Method for Compressive Strength of Cylindrical
is laterally supported at two locations: at the ground line and
Concrete Specimens
near the bottom end of the base. The bending load is applied
C192 Practice for Making and Curing Concrete Test Speci-
through a steel test arm consisting of a matching taper steel
mens in the Laboratory
adaptor with appropriate extension, which is of sufficient
C1804 Specification for Spun Cast Prestressed Concrete
length to deem shear effects negligible. Bending loads are
Bases for Tapered Steel Lighting Poles
applied gradually at a predetermined loading sequence. The
test bending moment is determined by multiplying the moment
3. Terminology
arm measured from the simulated ground line to the load
3.1 Definitions:
application point multiplied by the applied load value. Due to
3.1.1 cracking load—a load which creates a bending mo-
the relatively short height of these bases extending above
ment of enough magnitude to produce a tensile stress greater
ground line in comparison to the entire structure height,
than the sum of induced compression plus the tensile strength
obtaining deflection data is not required.
of the concrete resulting in tensile cracks on the tension face of
5. Significance and Use
the base.
3.1.2 cylindrical section—lower portion of base designed to 5.1 This test method is intended to provide the user with
be buried in concrete backfill below ground line. acceptable apparatus requirements and a prescribed procedure
to determine the bending moment capacity of spun pre-stressed
concrete bases for use with tapered steel poles.
1
This test method is under the jurisdiction ofASTM Committee C27 on Precast
5.2 The results of this test method are used as a basis for
Concrete Products and is the direct responsibility of Subcommittee C27.20 on
verification of calculated bending moment capacity, quality
Architectural and Structural Products.
control tool for manufacturing process and as a basis for
Current edition approved Jan. 1, 2016. Published January 2016. DOI: 10.1520/
C1824–16E01. determining statistical bending moment capacity.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1824 − 16
5.3 This test method shall not be used for full length cell controller shall have current calibration certificate. Cali-
prestressed concrete, steel, or composite poles. bration shall be performed annually.
6.5 Fixturing of Test Specimen—The test specimen shall be
6. Apparatus
laterally supported at the two reaction
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: C1824 − 16 C1824 − 16
Standard Test Method for
Full Scale Bending Test of Spun Prestressed Concrete
1
Bases for Tapered Steel Lighting Poles
This standard is issued under the fixed designation C1824; 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
ε NOTE—Editorial changes were made in March 2016.
1. Scope
1.1 This test method covers determination of ultimate bending moment capacity and cracking moment capacity of concrete
bases used as foundations for tapered steel lighting poles in accordance to Specification C1804.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
C39 Test Method for Compressive Strength of Cylindrical Concrete Specimens
C192 Practice for Making and Curing Concrete Test Specimens in the Laboratory
C1804 Specification for Spun Cast Prestressed Concrete Bases for Tapered Steel Lighting Poles
3. Terminology
3.1 Definitions:
3.1.1 cracking load—a load which creates a bending moment of enough magnitude to produce a tensile stress greater than the
sum of induced compression plus the tensile strength of the concrete resulting in tensile cracks on the tension face of the base.
3.1.2 cylindrical section—lower portion of base designed to be buried in concrete backfill below ground line.
3.1.3 ground line—is the distance from the butt end of the base to the point where theoretical embedment in the foundation is
specified (theoretical buried depth).
3.1.4 second crack (re-cracking) load—the load at which a previously formed crack will reopen.
3.1.5 spun base—a base in which the concrete is distributed and compacted through centrifugal force.
3.1.6 tapered section—upper portion of base, which has a taper designed to match overlapping steel pole taper.
3.1.7 ultimate load—maximum test load the base will carry in the specified direction before the steel or concrete will reach its
limiting state.
4. Summary of Test Method
4.1 This test consists of applying transverse loads at a predetermined distance to simulate bending moments induced by wind
forces exerted on the spun concrete base. The base is tested in a horizontal orientation. The concrete base specimen is laterally
supported at two locations: at the ground line and near the bottom end of the base. The bending load is applied through a steel
test arm consisting of a matching taper steel adaptor with appropriate extension, which is of sufficient length to deem shear effects
negligible. Bending loads are applied gradually at a predetermined loading sequence. The test bending moment is determined by
1
This test method is under the jurisdiction of ASTM Committee C27 on Precast Concrete Products and is the direct responsibility of Subcommittee C27.20 on Architectural
and Structural Products.
Current edition approved Jan. 1, 2016. Published January 2016. DOI: 10.1520/C1824–16.10.1520/C1824–16E01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
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C1824 − 16
multiplying the moment arm measured from the simulated ground line to the load application point multiplied by the applied load
value. Due to the relatively short height of these bases extending above ground line in comparison to the entire structure height,
obtaining deflection data is not required.
5. Significance and Use
5.1 This test method is intended to provide the user with acceptable apparatus requirements and a prescribed procedure to
determine the bending moment capacity of spun pre-stressed concrete bases for use with tapered steel poles.
5.2 The results of this test method are used as a basis for verification of calculated bending moment capacity, quality control
tool for manufacturing process and as a basis for determining statistical bending moment capacity.
5.3 This test method sha
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