ASTM C1623-22
(Specification)Standard Specification for Manufactured Concrete Masonry Lintels
Standard Specification for Manufactured Concrete Masonry Lintels
ABSTRACT
This specification covers concrete masonry lintels (beams) that are solid in cross-section, are reinforced for flexure, and are made from hydraulic cement, water, and mineral aggregates with or without the inclusion of other materials. These lintels are suitable for both loadbearing and nonloadbearing applications. Compression and absorption tests shall be performed to meet the specified requirements.
SCOPE
1.1 This specification covers concrete masonry lintels (beams) that are solid in cross-section, are reinforced for flexure, and are made from hydraulic cement, water, and mineral aggregates with or without the inclusion of other materials. These lintels are suitable for both loadbearing and nonloadbearing applications.
Note 1: This specification covers only concrete masonry lintels containing reinforcement. Due to building code imposed limitations on the design of masonry lintels, all lintels must contain reinforcement. Concrete masonry lintels are not typically manufactured using shear reinforcement (stirrups or other vertical reinforcement). Therefore, this standard does not address issues related to such. For further guidance, refer to Building Code Requirements for Masonry Structures, TMS 402. Prestressed concrete lintels are not covered by this standard.
1.2 Lintels are manufactured using a no-slump concrete mix to provide a surface texture similar to that of concrete masonry. This specification applies to both machine-made and hand-tamped concrete masonry lintels intended for use in concrete masonry applications.
1.3 Concrete masonry lintels covered by this specification are made from lightweight or normal weight aggregates, or both.
1.4 This specification does not address the design or analysis of lintel capacity. Structural evaluations must be performed separately. The strength of a lintel is a function of factors including, but not limited to, the characteristics of the materials used in manufacturing (concrete materials and reinforcement), the amount and location of reinforcement, and the manufacturing and curing procedures. For design and analysis methods, refer to Building Code Requirements for Masonry Structures, TMS 402.
1.5 This specification does not cover U-shaped lintels or those of other cross-sections that are not 100 % solid.
1.6 This specification does not cover lintels of grouted concrete masonry lintels, or precast or cast-in-place lintels of slump concrete.
1.7 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.8 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.
1.9 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.
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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: C1623 −22
Standard Specification for
1
Manufactured Concrete Masonry Lintels
This standard is issued under the fixed designation C1623; 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* 1.7 The text of this standard references notes and footnotes
that provide explanatory material. These notes and footnotes
1.1 This specification covers concrete masonry lintels
(excluding those in tables and figures) shall not be considered
(beams) that are solid in cross-section, are reinforced for
as requirements of the standard.
flexure, and are made from hydraulic cement, water, and
mineral aggregates with or without the inclusion of other 1.8 The values stated in inch-pound units are to be regarded
materials. These lintels are suitable for both loadbearing and as standard. The values given in parentheses are mathematical
nonloadbearing applications. conversions to SI units that are provided for information only
and are not considered standard.
NOTE 1—This specification covers only concrete masonry lintels
containingreinforcement.Duetobuildingcodeimposedlimitationsonthe 1.9 This international standard was developed in accor-
design of masonry lintels, all lintels must contain reinforcement. Concrete
dance with internationally recognized principles on standard-
masonry lintels are not typically manufactured using shear reinforcement
ization established in the Decision on Principles for the
(stirrupsorotherverticalreinforcement).Therefore,thisstandarddoesnot
Development of International Standards, Guides and Recom-
addressissuesrelatedtosuch.Forfurtherguidance,referto Building Code
mendations issued by the World Trade Organization Technical
Requirements for Masonry Structures, TMS 402. Prestressed concrete
lintels are not covered by this standard. Barriers to Trade (TBT) Committee.
1.2 Lintels are manufactured using a no-slump concrete mix
2. Referenced Documents
toprovideasurfacetexturesimilartothatofconcretemasonry.
2
This specification applies to both machine-made and hand-
2.1 ASTM Standards:
tamped concrete masonry lintels intended for use in concrete A615/A615M SpecificationforDeformedandPlainCarbon-
masonry applications.
Steel Bars for Concrete Reinforcement
A706/A706M Specification for Deformed and Plain Low-
1.3 Concrete masonry lintels covered by this specification
Alloy Steel Bars for Concrete Reinforcement
are made from lightweight or normal weight aggregates, or
A996/A996M Specification for Rail-Steel and Axle-Steel
both.
Deformed Bars for Concrete Reinforcement
1.4 This specification does not address the design or analy-
C33/C33M Specification for Concrete Aggregates
sis of lintel capacity. Structural evaluations must be performed
C140/C140M Test Methods for Sampling and Testing Con-
separately. The strength of a lintel is a function of factors
crete Masonry Units and Related Units
including,butnotlimitedto,thecharacteristicsofthematerials
C150/C150M Specification for Portland Cement
used in manufacturing (concrete materials and reinforcement),
C331/C331M Specification for Lightweight Aggregates for
the amount and location of reinforcement, and the manufac-
Concrete Masonry Units
turingandcuringprocedures.Fordesignandanalysismethods,
C595/C595M Specification for Blended Hydraulic Cements
refer to Building Code Requirements for Masonry Structures,
C618 Specification for Coal Fly Ash and Raw or Calcined
TMS 402.
Natural Pozzolan for Use in Concrete
1.5 This specification does not cover U-shaped lintels or
C979/C979M Specification for Pigments for Integrally Col-
those of other cross-sections that are not 100 % solid. ored Concrete
C989/C989M Specification for Slag Cement for Use in
1.6 This specification does not cover lintels of grouted
Concrete and Mortars
concrete masonry lintels, or precast or cast-in-place lintels of
C1157/C1157M Performance Specification for Hydraulic
slump concrete.
Cement
1
This specification is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
2
C15.03 on Concrete Masonry Units and Related Units. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 15, 2022. Published January 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2017 as C1623 – 17a. DOI: Standards volume information, refer to the standard’s Documen
...
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.
Designation: C1623 − 17a C1623 − 22
Standard Specification for
1
Manufactured Concrete Masonry Lintels
This standard is issued under the fixed designation C1623; 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*
1.1 This specification covers concrete masonry lintels (beams) that are solid in cross-section, are reinforced for flexure, and are
made from hydraulic cement, water, and mineral aggregates with or without the inclusion of other materials. These lintels are
suitable for both loadbearing and nonloadbearing applications.
NOTE 1—This specification covers only concrete masonry lintels containing reinforcement. Due to building code imposed limitations on the design of
masonry lintels, all lintels must contain reinforcement. Concrete masonry lintels are not typically manufactured using shear reinforcement (stirrups or
other vertical reinforcement). Therefore, this standard does not address issues related to such. For further guidance, refer to Building Code Requirements
for Masonry Structures, TMS 402. Prestressed concrete lintels are not covered by this standard.
1.2 Lintels are manufactured using a no-slump concrete mix to provide a surface texture similar to that of concrete masonry. This
specification applies to both machine-made and hand-tamped concrete masonry lintels intended for use in concrete masonry
applications.
1.3 Concrete masonry lintels covered by this specification are made from lightweight or normal weight aggregates, or both.
1.4 This specification does not address the design or analysis of lintel capacity. Structural evaluations must be performed
separately. The strength of a lintel is a function of factors including, but not limited to, the characteristics of the materials used
in manufacturing (concrete materials and reinforcement), the amount and location of reinforcement, and the manufacturing and
curing procedures. For design and analysis methods, refer to Building Code Requirements for Masonry Structures, TMS 402.
1.5 This specification does not cover U-shaped lintels or those of other cross-sections that are not 100 % solid.
1.6 This specification does not cover lintels of grouted concrete masonry lintels, or precast or cast-in-place lintels of slump
concrete.
1.7 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.8 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
This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.03 on
Concrete Masonry Units and Related Units.
Current edition approved Aug. 1, 2017Dec. 15, 2022. Published August 2017January 2023. Originally approved in 2005. Last previous edition approved in 2017 as
C1623 – 17.C1623 – 17a. DOI: 10.1520/C1623-17A.10.1520/C1623-23.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C1623 − 22
1.9 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
A996/A996M Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
C33C33/C33M Specification for Concrete Aggregates
C140C140/C140M Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C150C150/C150M Specification for Portland Cement
C331C331/C331M Specification for Lightweight Aggregates for Concrete Masonry Units
C595C595/C595M Specification for Blended H
...
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