ASTM C1623-05

Standard Specification for Manufactured Concrete Masonry Lintels

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.

General Information

• Status: Historical
• Publication Date: 14-Aug-2005
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C15 - Masonry – Manufactured Masonry Units, Mortars and Grouts
• Drafting Committee: C15.03 - Concrete Masonry Units and Related Units

Relations

• Replaced By: ASTM C1623-06 - Standard Specification for Manufactured Concrete Masonry Lintels
• Effective Date: 01-Dec-2006
• Referred By: ASTM C1232-21a - Standard Terminology for Masonry
• Effective Date: 15-Aug-2005
• 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-Aug-2005

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: C 1623 – 05
Standard Specification for
Manufactured Concrete Masonry Lintels
This standard is issued under the fixed designation C 1623; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope (excluding those in tables and figures) shall not be considered
as requirements of the standard.
1.1 This specification covers concrete masonry lintels
1.8 The values stated in inch-pound units are to be regarded
(beams) that are solid in cross-section, are reinforced for
as the standard. The values given in parentheses are for
flexure, and are made from hydraulic cement, water, and
information only.
mineral aggregates with or without the inclusion of other
materials. These lintels are suitable for both loadbearing and
2. Referenced Documents
nonloadbearing applications.
2.1 ASTM Standards:
NOTE 1—This specification covers only concrete masonry lintels con-
A 615 Specification for Deformed and Plain Billet-Steel
taining reinforcement. Due to building code imposed limitations on the
Bars for Concrete Reinforcement
design of masonry lintels, all lintels must contain reinforcement. Concrete
A 706 SpecificationforLow-AlloySteelDeformedBarsfor
masonry lintels are not typically manufactured using shear reinforcement
Concrete Reinforcement
(stirrupsorotherverticalreinforcement).Therefore,thisstandarddoesnot
A 996/A 996M-01 Standard Specification for Rail-Steel
addressissuesrelatedtosuch.Forfurtherguidance,referto Building Code
Requirements for Masonry Structures, ACI 530 / ASCE 5 / TMS 402.
and Axle-Steel Deformed Bars for Concrete Reinforce-
Prestressed concrete lintels are not covered by this standard.
ment
C33 Specification for Concrete Aggregates
1.2 Lintels are manufactured using a no-slump concrete mix
C 140 Test Methods for Sampling and Testing Concrete
toprovideasurfacetexturesimilartothatofconcretemasonry.
Masonry Units and Related Units
This specification applies to both machine-made and hand-
C 150 Specification for Portland Cement
tamped concrete masonry lintels intended for use in concrete
C 331 Specification for Lightweight Aggregates for Con-
masonry applications.
crete Masonry Units
1.3 Concrete masonry lintels covered by this specification
C 595 Specification for Blended Hydraulic Cements
are made from lightweight or normal weight aggregates, or
C 618 Specification for Coal Fly Ash and Raw or Calcined
both.
Natural Pozzolan for Use as a Mineral Admixture in
1.4 This specification does not address the design or analy-
Concrete
sis of lintel capacity. Structural evaluations must be performed
C 989 Specification for Ground Granulated Blast-Furnace
separately. The strength of a lintel is a function of factors
Slag for Use in Concrete and Mortars
including,butnotlimitedto,thecharacteristicsofthematerials
C 1157 Performance Specification for Hydraulic Cement
used in manufacturing (concrete materials and reinforcement),
C 1209 Terminology of Concrete masonry lintels and Re-
the amount and location of reinforcement, and the manufac-
lated Units
turingandcuringprocedures.Fordesignandanalysismethods,
C 1232 Terminology of Masonry
refer to Building Code Requirements for Masonry Structures,
C 1262 Test Method for Evaluating the Freeze-Thaw Dura-
ACI 530 / ASCE 5 / TMS 402.
bility of Manufactured Concrete Masonry Units and Re-
1.5 This specification does not cover U-shaped lintels or
lated Concrete Units
those of other cross-sections that are not 100 % solid.
2.2 Other Standards
1.6 This specification does not cover lintels of grouted
ACI 530 /ASCE 6 /TMS 402 Building Code Requirements
concrete masonry lintels, or precast or cast-in-place lintels of
for Masonry Structures
slump concrete.
ACI 530.1 / ASCE 6 / TMS 602 Specification for Masonry
1.7 The text of this standard references notes and footnotes
Structures
that provide explanatory material. These notes and footnotes
1 2
This specification is under the jurisdiction of ASTM Committee C15 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Manufactured Masonry Units and is the direct responsibility of Subcommittee contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
C15.03 on Concrete Masonry Units and Related Units. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Aug. 15, 2005. Published October 2005. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1623–05
separately by the purchaser. Consult local suppliers as to the availability
3. Terminology
of lintels having the desired features.
3.1 Terminology defined in Terminology C 1209 and Ter-
minology C 1232 shall apply for this specification. 5.2 All lintels shall be sound and free of cracks or other
defects that interfere with proper placement unless defects are
4. Material
considered to be not detrimental to structural capacity of the
4.1 Cementitious Materials—Materials shall conform to the lintel before or after defects are repaired using practices
satisfactory to the engineer.
following applicable specifications: 4.1.1 Portland Cement—
Specification C 150.
NOTE 3—The purchaser is the public body or authority, association,
4.1.1 Portland Cement—Specification C 150.
corporation, partnership, or individual entering into a contract or agree-
4.1.2 Modified Portland Cement—Portland cement con-
ment to purchase or install, or both, concrete masonry lintels. The time of
forming to Specification C 150, modified as follows:
delivery to the purchaser is FOB plant when the purchaser or the
(1) Limestone – If calcium carbonate is added to the cement, purchaser’s agent transports the concrete masonry lintels, or at the time
unloaded at the worksite if the manufacturer or the manufacturer’s agent
the CaCO content shall be not less than 85 %.
transports the concrete masonry lintels.
(2) Limitation on Insoluble Residue—1.5 %.
NOTE 4—When these lintels are used in above-grade applications as
(3) Limitation on Air Content of Mortar—Volume percent,
part of a vertical, free-draining assemblage, the physical requirements in
22 % max.
this specification have been shown to result in durable products. In
(4) Limitation on Loss on Ignition—7 %.
applications where the lintels are frequently exposed to deicing chemicals
4.1.3 Blended Hydraulic Cements—Specification C 595
or saturated conditions in conjunction with freezing and thawing tempera-
4.1.4 Hydraulic Cement —Specification C 1157.
tures, testing should be considered to evaluate freezing and thawing
4.1.5 Pozzolans—Specification C 618. resistance using ASTM C 1262.
4.1.6 Ground Granulated Blast Furnace Slag—
6. Permissible Variations in Dimensions
Specification C 989.
4.1.7 Silica Fume—Specification C 1240
6.1 Overall dimensions for width, and height shall differ by
4.2 Aggregates—Aggregates shall conform to the follow-
not more than 6 ⁄8 in. (3.2 mm) from the specified standard
ing specifications, except that grading requirements shall not
dimensions. Overall dimension for length shall differ by not
necessarily apply:
more than 0.5 % from the specified length.
4.2.1 Normal Weight Aggregates—SpecificationC33.
6.2 Warpage
4.2.2 Lightweight Aggregates—Specification C 331.
6.2.1 The longitudinal straightness of each of the four faces
4.3 Steel Reinforcement—Steel reinforcement shall consist
shall not deviate from a straight line more than ⁄4 in. (6 mm)
of deformed bars conforming to Specifications A 615, A 706,
over 10 ft (3.05 m). Measure deviations with lintel resting on
or A 996
flat, horizontal surface.
4.4 Other Constituents—Air-entraining agents, coloring
6.2.2 The cross-section of the lintel shall not deviate from
pigments, integral water repellents, finely ground silica, and
square more than ⁄8 in. (3 mm) over 8 in. (203 mm) in height.
otherconstituentsshallbepreviouslyestablishedassuitablefor
use in concrete masonry lintels and shall conform to applicable
7. Requirements for Reinforcement
ASTM standards or shall be shown by test or experience not to
7.1 Reinforcement and its placement shall comply with
be detrimental to the durability of the concrete masonry lint
...