By Rochelle C. Jaffe
Rochelle Jaffe is an authorized architect and a certified structural engineer. She is additionally qualified as a building specifier (by the development Specification Institute) and as a distinct inspector of structural masonry (by the overseas convention of creating Officials). As a Senior undertaking advisor with NTH experts, Ltd., in Farmington Hills, Michigan, Ms. Jaffe focuses on research, assessment, and rehabilitation of current, deteriorated, and broken masonry buildings, and has over two decades' event during this field.Ms. Jaffe is a member of the yank Concrete Institute (ACI) and the yank Society of Civil Engineers (ASCE). As an lively member of The Masonry Society (TMS), she is a former member of the Board of administrators and a former editor of the magazine, serves at the layout Practices Committee, and is present chairperson of the Architectural Practices Committee. Her lively participation within the ACI/ASCE/TMS Masonry criteria Joint Committee, the crowd that authors the construction Code standards for Masonry constructions (ACI 530/ASCE 5/TMS 402) and the Specification for Masonry buildings (ACI 530.1/ASCE 6/TMS 602), comprises serving as a former chair of the Stone Cladding Subcommittee.Ms. Jaffe has authored or co-authored journal articles and texts, in addition to various technical stories on the topic of investigations of masonry buildings with fabric and architectural or structural deficiencies. She has spoken at quite a few seminars and different technical services.
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Physical requirements for ASTM C 1405 glazed units are based on the unit class (exterior or interior), while those for ASTM C 126 are based on the direction of the coring in the units. In ASTM C 1405, the class refers to the installation application of exterior or interior. When the class is not specified, the requirements for Class Exterior govern. 6. Glazed clay units are specified by type, grade, and class. In both relevant ASTM standards, the type refers to the number of finished (glazed) faces.
01. Freezing and thawing testing consists of cycles of 4 hour submersion in a 75 degree F water-filled thawing tank followed by 20 hours in 1⁄2 inch of water in a freezer. The five half-length bricks are subjected to 50 cycles unless withdrawn from the test due to disintegration. 5 percent • Specimen separates into two or more significant pieces • Specimen develops a crack whose length exceeds the minimum dimension of the specimen To evaluate the initial rate of absorption, five whole bricks are used.
For concrete roof pavers, three full-size units are required to be tested for flexural (bending) capacity. When the top surface is irregular, the test specimen must be capped as is done for compression testing. The flexural testing applies a single line load along the center of the test specimen. Absorption testing may be performed on full-size units or on specimens that have been saw-cut from full-size units. For absorption testing, the test specimens are immersed in 60 to 80 degree F water for 24 hours.