The most widely-used standards for specifying concrete masonry units in the United States are published by ASTM International. These ASTM standards contain minimum requirements that assure properties necessary for quality performance. These requirements include items such specified component materials, compressive strength, permissible variations in dimensions, and finish and appearance criteria. Currently, seven ASTM standards apply to units intended primarily for construction of concrete masonry walls, beams, columns or specialty applications (see Table 1).The letter and first number of an ASTM designation is the fixed designation for that standard. For example, ASTM C55 is the fixed designation for concrete building brick. The number immediately following indicates the year of last revision (i.e., ASTM C55-11 is the version of C55 published in 2011). A date in parentheses after the last revision date is the reapproval date.
Because significant changes can be introduced into subsequent editions, the edition referenced by the building code or by a project specification can be an important consideration when determining specific requirements. Also note that it may take several years between publication of a new ASTM standard and its subsequent reference by a building code. For this reason, Table 1 includes the editions referenced in the 2006, 2009 and 2012 editions of the International Building Code (IBC) (ref. 1), as well as the most current ASTM edition. Code officials will commonly accept more current editions of ASTM standards than that referenced in the code, as they represent state-of-the-art requirements.
Philippine National Building Code Pdf 11
Developed through the review of proposed changes submitted by code enforcement officials, industry representatives, design professionals, and other interested parties, the 2021 International Building Code, just as its mass of predecessors, establishes minimum guidelines for building systems that make possible the use of new materials and new building designs. This is carried out in a manner that provides a reasonable level of safety, public health, and general welfare through prescriptive and performance related guidelines.
While the International Building Code (ICC IBC-2021) serves as the basis for laws and regulations in communities across the United States and in other countries, it is used in a variety of nonregulatory settings, including voluntary compliance programs, the insurance industry, certification of individuals and buildings, U.S. federal agencies, facilities management, best practices benchmarks, and reference works. 2ff7e9595c
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