ASTM C1261-05

Standard Specification for Firebox Brick for Residential Fireplaces

SCOPE
1.1 This specification covers brick intended for use as the lining in the fireboxes of residential fireplaces.
1.2 Firebox brick are manufactured from clay, fire clay, shale, or similar naturally occurring earthy substances and subjected to a heat treatment at elevated temperatures (firing). The heat treatment must develop a fired bond between the particulate constituents to provide the strength and durability requirements of this specification.
Note 1—Firebox brick are typically installed using ground fire clay mortar or refractory mortar. Mortar joints are typically 1/ 8 in. (3.2 mm) thick, just thick enough to accommodate dimensional variations in the firebox brick.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The text of this specification 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 this specification.

General Information

• Status: Historical
• Publication Date: 31-Dec-2003
• ICS: 81.080 - Refractories
• Technical Committee: C15 - Manufactured Masonry Units
• Drafting Committee: C15.02 - Brick and Structural Clay Tile

Relations

• Replaces: ASTM C1261-04 - Standard Specification for Firebox Brick for Residential Fireplaces
• Effective Date: 01-Jan-2004
• Replaced By: ASTM C1261-07 - Standard Specification for Firebox Brick for Residential Fireplaces
• Effective Date: 01-Jun-2007
• Referred By: ASTM C1232-21a - Standard Terminology for Masonry
• Effective Date: 01-Jan-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 1261 – 05
Standard Specification for
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Firebox Brick for Residential Fireplaces
This standard is issued under the fixed designation C 1261; 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* 4. Materials, Manufacture, and Finish
1.1 This specification covers brick intended for use as the 4.1 Clay, as it occurs in nature, differs in composition and
lining in the fireboxes of residential fireplaces. physical properties. These differences are compensated for by
1.2 Firebox brick are manufactured from clay, fire clay, varying the manufacture processes of forming and firing. In
shale, or similar naturally occurring earthy substances and order to be satisfactory for firebox brick production, clays must
subjected to a heat treatment at elevated temperatures (firing). have plasticity that permits them to be shaped or molded when
The heat treatment must develop a fired bond between the mixed with water. Clays must also have sufficient tensile
particulate constituents to provide the strength and durability strength to maintain shape.
requirements of this specification. 4.2 Firebox brick are shaped during manufacture by mold-
ing, pressing, or extruding and cutting. Firebox brick shall be
NOTE 1—Firebox brick are typically installed using ground fire clay
100 % solid with no cores or frogs.
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mortar or refractory mortar. Mortar joints are typically ⁄8 in. (3.2 mm)
4.3 Firebox brick shall be free of defects, deficiencies, and
thick, just thick enough to accommodate dimensional variations in the
firebox brick. surface treatments, including coatings, that would interfere
with the proper setting of the brick or significantly impair the
1.3 The values stated in inch-pound units are to be regarded
strength or performance of the construction.
as the standard. The values given in parentheses are for
information only.
5. Physical Properties
1.4 The text of this specification references notes and
5.1 Modulus of Rupture—Residential firebox brick shall
footnotes that provide explanatory material. These notes and
have a minimum modulus of rupture of 500 psi (3.45 MPa).
footnotes (excluding those in tables and figures) shall not be
5.2 Pyrometric Cone Equivalent (PCE)—Firebox brick
considered as requirements of this specification.
shallhaveaminimumpyrometricconeequivalent(PCE)of13.
2. Referenced Documents
6. Dimensions and Permissible Variations
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2.1 ASTM Standards:
6.1 Size—The size of the firebox brick shall be as specified
C24 TestMethodforPyrometricConeEquivalent(PCE)of
by the purchaser. In the sample of units, no firebox brick shall
Fire Clay and High Alumina Refractory Materials
depart from the specified size by more than the maximum
C43 Terminology of Structural Clay Products
permissible variation given in Table 1.
C67 Test Methods of Sampling and Testing Brick and
6.2 Warpage—Tolerances for distortion or warpage of face
Structural Clay Tile
or edges of individual brick from a plane surface and from a
straight line, respectively, shall not exceed the maximum
3. Terminology
permissible distortion given in Table 1.
3.1 Definitions—For definitions of terms relating to this
6.3 Visual Inspection—The brick, as delivered to the site,
specification, see TerminologyC43.
shall conform by visual inspection to the samples approved as
the standard of comparison. Minor indentations or surface
cracks incidental to the usual method of manufacturing or the
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This specification is under the jurisdiction of ASTM Committee C15 on
chippage resulting from the customary methods of handling in
Manufactured Masonry Units and is the direct responsibility of Subcommittee
shipments and delivery shall not be deemed grounds for
C15.02 on Brick and Structural Clay Tile.
rejection.
Current edition approved Dec. 15, 2005. Published January 2006. Originally
approved in 1994. Last previous edition approved in 2004 as C 1261 – 04.
6.4 Variation of Appearance Requirements—When units are
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
required for decorative installations that have appearance
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
requirements, that is, size variation, distortion, or chippage,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. other than those prescribed by this specification, the purchaser
*ASummary of Changes section appears at the end of this standard.
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