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.

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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

C979 Specification for Pigments for Integrally Colored Concrete

C989 Specification for Slag Cement for Use in Concrete and Mortars

C1157 Performance Specification for Hydraulic Cement

C1232 Terminology of Masonry

C1240 Specification for Silica Fume Used in Cementitious Mixtures

C1262 Test Method for Evaluating the Freeze-Thaw Durability of Dry-Cast Segmental Retaining Wall Units and Related Concrete Units

Keywords

absorption; compressive strength; concrete masonry lintel; loadbearing; lintel; reinforced; Concrete masonry--specifications; Lintels; Loadbearing masonry units--specifications; Compressive strength; Absorption

ICS Code

ICS Number Code 91.100.30 (Concrete and concrete products)

DOI: 10.1520/C1623-05

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