Standard Test Method for In Situ Measurement of Masonry Deformability Properties Using the Flatjack Method
Standard Test Method for In Situ Measurement of Masonry Deformability Properties Using the Flatjack Method
SIGNIFICANCE AND USE 5.1 Deformation and strength properties are measured only on the masonry between flatjacks. Boundary effects of the collar joint behind the wythe tested and adjacent masonry are neglected. In the case of multi-wythe masonry, deformability is estimated only in the wythe in which the flatjack is inserted. Deformability of other wythes may be different. SCOPE 1.1 This test method describes an in situ method for determining the deformation properties of existing unreinforced solid-unit masonry. (See Note 1.) This test method concerns the measurement of in-situ masonry deformability properties in existing masonry by use of thin, bladder-like flatjack devices that are installed in cut mortar joints in the masonry wall. This test method provides a relatively non-destructive means of determining masonry properties. Note 1: Solid-unit masonry is that built with stone, concrete, or clay units whose net area is equal to or greater than 75 % of the gross area. 1.2 The text of this standard refers to 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. 1.3 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. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 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.
ASTM C1197-22 outlines the standard test method for in situ measurement of masonry deformability properties using the flatjack method. Developed by ASTM International, this standard is applicable primarily to existing unreinforced solid-unit masonry constructed from stone, concrete, or clay units. The flatjack method is a relatively non-destructive testing approach, allowing engineers to determine the deformation properties of masonry structures directly and efficiently while minimizing damage to the investigated area.
This test method is especially significant for evaluating existing masonry in historical buildings and infrastructure, where traditional destructive testing techniques are not viable or desirable. The method measures deformation properties solely in the section of masonry between flatjacks, providing engineers and asset managers with key insights for structural assessment and conservation planning.
The ASTM C1197-22 standard is applicable in a variety of practical scenarios involving masonry assessment:
Другие стандарты ASTM
Typical users include structural engineers, heritage consultants, building surveyors, and infrastructure asset managers seeking accurate, minimally invasive assessment data.
For comprehensive interpretation and use of ASTM C1197-22, the following related ASTM standards are referenced and widely utilized:
These standards provide the foundational terminology and calibration procedures necessary for consistent application and reporting in accordance with ASTM C1197-22.
By using ASTM C1197-22, professionals can carry out reliable, in situ deformation testing of masonry, ensuring safety, durability, and informed decision-making for new and existing masonry structures. This standard supports effective non-destructive testing in line with international best practices and regulatory principles.