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ACI 318 Building Code Requirements for Structural Concrete provides minimum requirements necessary to provide public health and safety for the design and construction of structural concrete buildings. [6] It is issued and maintained by the American Concrete Institute. [7] The latest edition of the code is ACI 318-19.
The ACI 318 Building Code Requirements for Structural Concrete uses Limit State design. The ANSI/ AISC 360 Specification for Structural Steel Buildings , the ANSI/ AISI S-100 North American Specification for the Design of Cold Formed Steel Structural Members , and The Aluminum Association 's Aluminum Design Manual contain two methods of design ...
Common US specifications, published by ACI and ASTM, are: American Concrete Institute: "ACI 318-14 Building Code Requirements for Structural Concrete and Commentary", ISBN 978-0-87031-930-3 (2014) ASTM A82: Specification for Plain Steel Wire for Concrete Reinforcement
Anchor channels and channel bolts are qualified in Europe according to EAD 330008-XX-0601 and designed according to EN 1992-4. In the US, the system is qualified according to Acceptance Criteria AC232 and designed according to AC232 and ACI 318.
The ACI codebook puts an upward limit on the spacing between ties. ACI Code 7.10.5: Vertical spacing of ties shall not exceed 16 longitudinal bar diameters, 48 tie bar or wire diameters, or least dimension of the compression member. If the ties are spaced too far apart, the column will experience shearfailure and barrel in between the ties. [4]
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Reinforced concrete structures are normally designed according to rules and regulations or recommendation of a code such as ACI-318, CEB, Eurocode 2 or the like. WSD, USD or LRFD methods are used in design of RC structural members. Analysis and design of RC members can be carried out by using linear or non-linear approaches.
The ultimate strength of concrete is influenced by the water-cementitious ratio (w/cm), the design constituents, and the mixing, placement and curing methods employed.All things being equal, concrete with a lower water-cement (cementitious) ratio makes a stronger concrete than that with a higher ratio. [2]