Find the most up-to-date version of CSA S at Engineering The level of seismic upgrading of the OFCs required is dependent on the performance objective selected for the asset, as defined in CAN / CSA -S . Buy CSA S SEISMIC RISK REDUCTION OF OPERATIONAL AND FUNCTIONAL COMPONENTS (OFCS) OF BUILDINGS from SAI.
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While seismic risk reduction of OFCs is affected by the structural performance of a building, this Standard does not address structural integrity see Clause 1.
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A higher level of cza, beyond the minimum established in this Seismic Standard, shall be considered. OFCs are divided into three categories of sub-components: Buildings in Canada that are designed in accordance with early codes can be vulnerable to the failure or malfunctioning of OFCs after an earthquake. National codes and guidelines are in place for the seismic design, evaluation, and upgrading of building structures in Canada.
The required Minimum level of seismic resistance for existing buildings to satisfy life safety requirements assuming National Building Code of Canada seismic loading requirements as the baseline is to be determined through a risk-based approach taking into consideration of the following three factors:. Earthquakes have rendered many buildings unusable due to extensive damage to their operational and functional components OFCs commonly referred to as non-structural componentsincluding building contents.
These systems require special interfacing design and details at the building junction to allow for differential movements between the building and its surrounding environment. The damage resulting from these components can be considerably more than that arising from structural component failure, particularly in areas of low and moderate seismic intensity.
Annexes are designated normative mandatory or informative non-mandatory to define their application. To obtain further information or to contact your regional representative, please contact tpsgc. Please first log in with a verified email before subscribing to alerts. However, the application of this Standard can result in continued functionality and operation for certain OFCs, depending on the intensity of shaking and the level of over-design introduced in the mitigation scheme.
Some OFCs can contribute to the structural integrity of a building, depending on their location, type of construction, and method of fastening, but these are not generally considered structural components. Lifeline components in the immediate vicinity of the building and essential to its performance objective such as transformers, back-up power generators, fuel tanks, elevators, etc. As the voice of the U. Planned additions to existing buildings are considered to be under the category of new buildings.
You may delete a document from your Alert Profile at any time. Need more than one copy? These include, but are not limited to, building components such as canopies over exit ways, partitions, roof parapets, mechanical and electrical systems, ceilings, and cladding.
The optimum level of upgrade shall be selected based on a holistic review of financial, functional, operational, security, and client requirements, including a review of the Investment Analysis Report.
Please first verify your email before subscribing to alerts. The new guideline will also provide information on the general understanding of both the potential seismic deficiencies and the methods of seismic upgrading of stone masonry structures. Most complex OFCs containing electronic parts, for example that are used in high seismic areas are designed and built with internal seismic isolation and subjected to seismic qualification testing.
Upgrade options for operational and functional components OFCs shall be considered. We have no document history for this standard. Subscription pricing is determined by: Where a seismic upgrade is deemed necessary, the upgraded structure must have a seismic resistance that at least meets the minimum level as outlined in the Seismic Standard.
When determining what constitutes a significant project, the long range plans for the asset must be reviewed in order to determine the most appropriate time to complete any necessary seismic upgrades mid-life retrofit, major base building recapitalization. Guidelines for the seismic risk reduction of OFCsalso known as non-structural building components that is, building contents, bookcases, piping, light fixtures, etc. This standard is also available to be included in Standards Subscriptions.
Notes to tables and figures are considered part of the table or figure and may be written as requirements. Changes to this edition include a harmonization with the National Building Code of Canada NBCC; b a general reorganization of contents; c revisions in definitions and symbols; d update of references; e revised definitions of OFC performance objectives; f a revised clause Clause 5 on procedures for OFCs in new buildings; g new flowcharts Figures 3 to 5 to better illustrate the various procedures described in this Standard; h a revised clause Clause 7.
PSPC has been working with the NRC to update the following seismic screening and seismic evaluation tools for the use on existing buildings. This standard is not included in any packages.
Some examples of building components and sub-components are listed in Figures 1 and 2. Definitions of the appropriate consequence class for the two most common building occupancies for PSPCthat is office buildings and public buildings buildings to where the public are admittedare given in the Seismic Standard. For example, a seismic resistance of 0. If the document is revised or amended, you will be notified by email.
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Intrinsic functionality issues refer to the functionality of those OFCs that would be adversely affected by the malfunction of one or more elements damaged by the design earthquake.
PSPC is developing a new guideline to aid the seismic assessment of stone masonry structures.
Seismic Standard – Technical Guides – NPMS – Real Property – PSPC
However, as a result of damage caused by recent earthquakes, focus has shifted to the behaviour of OFCs in overall building performance. Seismic requirements for existing buildings undergoing significant projects are to be in compliance with this section.
Such work must be undertaken by a qualified professional engineer.