ASTM C1623-11

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/ACI 530/ASCE 5. 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/ACI 530/ASCE 5.
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.

General Information

• Status: Historical
• Publication Date: 14-Dec-2011
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C15 - Manufactured Masonry Units
• Drafting Committee: C15.03 - Concrete Masonry Units and Related Units

Relations

• Replaces: ASTM C1623-06 - Standard Specification for Manufactured Concrete Masonry Lintels
• Effective Date: 15-Dec-2011
• Replaced By: ASTM C1623-16 - Standard Specification for Manufactured Concrete Masonry Lintels
• Effective Date: 15-Dec-2016
• Referred By: ASTM C1232-21a - Standard Terminology for Masonry
• Effective Date: 15-Dec-2011
• Referred By: ASTM C1922-23 - Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters by Way of Water Loss
• Effective Date: 15-Dec-2011

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1623 −11
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
design of masonry lintels, all lintels must contain reinforcement. Concrete
2. Referenced Documents
masonry lintels are not typically manufactured using shear reinforcement
2
(stirrups or other vertical reinforcement).Therefore, this standard does not
2.1 ASTM Standards:
addressissuesrelatedtosuch.Forfurtherguidance,referto Building Code
A615/A615M Specification for Deformed and Plain Carbon-
Requirements for Masonry Structures, TMS 402 ⁄ACI 530 ⁄ASCE 5. Pre-
Steel Bars for Concrete Reinforcement
stressed concrete lintels are not covered by this standard.
A706/A706M Specification for Deformed and Plain Low-
1.2 Lintels are manufactured using a no-slump concrete mix
Alloy Steel Bars for Concrete Reinforcement
to provide a surface texture similar to that of concrete masonry.
A996/A996M Specification for Rail-Steel and Axle-Steel
This specification applies to both machine-made and hand-
Deformed Bars for Concrete Reinforcement
tamped concrete masonry lintels intended for use in concrete
C33 Specification for Concrete Aggregates
masonry applications.
C140 Test Methods for Sampling and Testing Concrete
1.3 Concrete masonry lintels covered by this specification
Masonry Units and Related Units
are made from lightweight or normal weight aggregates, or
C150 Specification for Portland Cement
both.
C331 Specification for LightweightAggregates for Concrete
Masonry Units
1.4 This specification does not address the design or analy-
sis of lintel capacity. Structural evaluations must be performed C595 Specification for Blended Hydraulic Cements
C618 Specification for Coal Fly Ash and Raw or Calcined
separately. The strength of a lintel is a function of factors
including,butnotlimitedto,thecharacteristicsofthematerials Natural Pozzolan for Use in Concrete
used in manufacturing (concrete materials and reinforcement), C979 Specification for Pigments for Integrally Colored Con-
the amount and location of reinforcement, and the manufac- crete
turing and curing procedures. For design and analysis methods, C989 Specification for Slag Cement for Use in Concrete and
refer to Building Code Requirements for Masonry Structures, Mortars
TMS 402⁄ACI 530⁄ASCE 5. C1157 Performance Specification for Hydraulic Cement
C1232 Terminology of Masonry
1.5 This specification does not cover U-shaped lintels or
C1240 Specification for Silica Fume Used in Cementitious
those of other cross-sections that are not 100 % solid.
Mixtures
1.6 This specification does not cover lintels of grouted
C1262 Test Method for Evaluating the Freeze-Thaw Dura-
concrete masonry lintels, or precast or cast-in-place lintels of
bility of Dry-Cast Segmental Retaining Wall Units and
slump concrete.
Related Concrete Units
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, 2011. Published January 2012. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2006 as C1623 – 06. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1623-11. the ASTM website.
*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
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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 – 06
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, ACI 530 / ASCE 5 / 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, ACI 530 /
ASCE 5 / 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 the standard.The values given in parentheses are for information
only.
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 Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement
A996/A996M Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
C33 Specification for Concrete Aggregates
C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C150 Specification for Portland Cement
C331 Specification for Lightweight Aggregates for Concrete Masonry Units
C595 Specification for Blended Hydraulic Cements
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
C989 Specification for Slag Cement for Use in Concrete and Mortars
C1157 Performance Specification for Hydraulic Cement
C1209 Terminology of Concrete Masonry Units and Related Units
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 Dec. 1, 2006. Published January 2007. Originally approved in 2005. Last previous edition approved in 2005 as C1623 – 05. DOI:
10.1520/C1623-06.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary 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.
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