ASTM C901-18

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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: C901 − 10 C901 − 18
Standard Specification for
Prefabricated Masonry Panels
This standard is issued under the fixed designation C901; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers the structural design and quality control of fabrication for load-bearing and non-load-bearing
prefabricated masonry panels. Methods of prefabrication, field erection, and jointing are not covered in this specification.
1.2 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.
1.3 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.
1.4 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
2.1 ASTM Standards:
C67 Test Methods for Sampling and Testing Brick and Structural Clay Tile
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C270 Specification for Mortar for Unit Masonry
C476 Specification for Grout for Masonry
C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C1019 Test Method for Sampling and Testing Grout
C1180 Terminology of Mortar and Grout for Unit Masonry
C1232 Terminology for Masonry
C1314 Test Method for Compressive Strength of Masonry Prisms
C1357 Test Methods for Evaluating Masonry Bond Strength (Withdrawn 2016)
C1717 Test Methods for Conducting Strength Tests of Masonry Wall Panels
E518 Test Methods for Flexural Bond Strength of Masonry
2.2 Other Standards:
TMS 402⁄ACI 530⁄ASCE 5 Building Code Requirements for Masonry Structures
TMS 602⁄ACI 530.1⁄ASCE 6 Specification for Masonry Structures
3. Terminology
3.1 The terms used in this specification are identified in Terminologies C1180 and C1232.
This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.05 on
Masonry Assemblies.
Current edition approved Dec. 15, 2010Sept. 1, 2018. Published December 2010September 2018. Originally approved in 1979. Last previous edition approved in 20092010
as C901 – 09.C901 – 10. DOI: 10.1520/C0901-10.10.1520/C0901-18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
Available from The Masonry Society, 3970 Broadway, Suite 201-D, Boulder, CO 80304–1135,105 South Sunset Street, Suite Q, Longmont, CO 80501-6172,
http://www.masonrysociety.org.
*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
C901 − 18
4. Materials and Manufacture
4.1 Masonry—Masonry units, mortar, grout, reinforcement, anchors, ties, and accessories shall conform to
TMS 602TMS 602.⁄ACI 530.1⁄ASCE 6.
5. Structural Design
5.1 General—Structural design of panels shall be performed in accordance with the provisions of the applicable local building
code and the requirements of TMS 402TMS 402.⁄ACI 530⁄ASCE 5. Structural design of panels shall consider all loading and
restraint conditions from initial fabrication to in-service conditions in the completed structure, including storage, transportation,
and erection. The design loads shall be of the type and magnitude required by the applicable building code. Panels and connections
required to resist wind, seismic, or other dynamic loads shall be designed to resist the required positive and negative forces in all
directions. The joints between dissimilar materials within each panel, between panels, and between panels and their structural
supports shall be designed to accommodate differential movement and deflections of each material, panel, and adjacent building
elements.
5.2 Lifting Devices—Lifting devices and their connections to the panels shall have an ultimate capacity of four times the dead
weight of the appropriate portion of the panel. Inclination of the lifting forces shall be considered.
6. Dimensions and Permissible Variations
6.1 Standard Dimensions—The standard nominal widths and heights of the panels shall be in multiples of nominal individual
masonry unit heights and lengths. The nominal thickness of panels shall be the sum of the nominal thicknesses of the masonry units
in the panels plus the nominal thickness of cavities, if any. The specified dimensions may be less than the required nominal
dimensions by the thickness of one mortar joint but not by more than ⁄2 in. (13 mm).
6.2 Custom Dimensions—For custom installations, all dimensions of panels shall be as shown on the drawings or as specified.
6.3 Thickness of panels—The specified thickness of the panels shall be as required for adequate strength, fire resistance, or other
design criteria for the type of construction and occupancy as required by the applicable building code.
6.4 Dimensional Tolerances—Based on actual dimensions, a prefabricated masonry wall panel shall not vary from the specified
face dimensions by more than the following:
10 ft (3.05 m) or under—± ⁄8 in. (3.2 mm)
1 3
10 to 20 ft (3.5 to 7.1 m)—+ ⁄8 in. (3.2 mm) or − ⁄16 in. (4.8 mm)
1 1
20 to 30 ft (6.096 to 9.144 m)—+ ⁄8 in. (3.2 mm) or − ⁄4 in. (6.4 mm)
For each additional 10 ft (3.5 m)—± ⁄16 in. (1.6 mm)
The maximum permissible variation from the specified thickness of prefabricated masonry panels shall be not greater than − ⁄8
in. (3.2 mm) or + ⁄4 in. (6.4 mm). Prefabricated masonry panels shall have maximum out-of-square differential dimensions
(difference in length of the two diagonal face measurements) not greater than ⁄8 in./6 ft
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