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Guidelines for foundation designs in dolomitic areas
Background
The NHBRC Manual and the Joint Structural Division, Code of Practice for Foundation and Superstructures for Single Storey Residential Buildings of Masonry Construction, provide with clear guidelines with respect to foundation design for prevailing soil conditions on a particular site. However, both documents do not provide clear design criteria and guidelines for foundation design in dolomitic areas. Most designers utilise, for design purpose, information published in an article published in the SAICE Journal (vol. 44(3), 2002), namely: Discussion: Proposed method for dolomite land hazard and risk assessment in South Africa.
The article was published as a discussion paper, without any alternative guidelines, designers used it as best available information on how to design foundation on dolomitic areas. However, the article had its shortcomings in particular the use of earth mattress for structural purpose (i.e. designed to roof over a sinkhole). Therefore, this document is based on the refined work on the article. In addition, the information in here is to be published in the latest revision of SANS 10400.
Purpose
The purpose of this document is to provide designers with the criteria and guidelines for foundation designs in dolomitic areas.
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Assessment of Housing Products
Background
The National Building Regulations and Building Standard Act, 1977 (Act 103 of 1977) form a basis
on how the development of buildings and their surroundings are to be done in order suit human
habitation. It is from this basis that the Regulations, made in terms of the Act, prescribes mandatory
requirements that support the objectives of the Act. Any conventional material, methods or systems
that can be utilised in the construction of building are documented in the Code of Practice (SANS
10400): The Application of the National Building Regulations.
Purpose
The purpose of this document is to describe the process at which a housing product, either
conventional or not, follows in order to comply with the National Building Regulation’s mandatory
requirements. The document also discusses the National Home Builders Registration Council
(NHBRC) and Agrément processes of assessing new housing products.
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