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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Seismic resistance of the building shall be expressed as a percentage of the current National Building Code of Canada requirements for new buildings.
Planned additions to existing buildings are considered to be under the category s823 new buildings.
The planned timelines for the development of these tools are as follows:. 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.
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. However, as a result of damage caused by recent earthquakes, focus has shifted to the behaviour of OFCs in overall building performance.
Need more than one copy? Subscription pricing is determined by: The main focus of the new guideline will be on strategies that can be used as a decision support tool for identification of the appropriate approach for the seismic assessment and upgrading of heritage masonry structures. Already Subscribed to this document. Seismic requirements for existing buildings undergoing significant projects are to be in compliance with this section.
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.
External seismic hazards such as potential failure of service lifelines, ground failures outside the building, and business resumption after an earthquake are not addressed in the Seismic Standard. New buildings shall be designed and constructed in accordance with the seismic requirements of the current National Building Code of Canada.
Due consideration shall be given to internally fragile OFCs equipped with stop anchors or snubbers comprising air gaps as large shock accelerations may be induced if the OFC impacts on its supports during strong shaking [see Clause 9.
In a number of cases, improvements to the overall seismic performance of the building can be achieved by improving the performance of OFCs. For example, a seismic resistance of 0. A higher level of upgrading, beyond the minimum established in this Ss832 Standard, shall be considered.
Your Alert Profile lists the documents that will be monitored. 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. 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:.
It supersedes the previous editions published in and The damage resulting from these components can be considerably more than that arising from structural css failure, particularly in areas of low and moderate seismic intensity. Upgrade options for operational and functional components OFCs shall be considered.
Annexes are designated normative mandatory or informative non-mandatory to define their application. This Standard is intended to address the need to reduce the seismic risk of OFCs and thus improve the post-earthquake functionality of buildings. PSPC has been working cs the NRC to update the following seismic screening and seismic evaluation tools for the use on existing buildings. The classification of consequences of failure is based on recent research conducted by the National Research Council refer to Relevant Technical Documentation below.
Definitions of the appropriate consequence class for the two most common building occupancies for PSPCthat is office buildings and public buildings buildings to cs the public are admittedare given in the Seismic Standard. Please first verify your email before subscribing to css. Some examples of building components and sub-components are listed in Figures 1 and 2. National codes and guidelines are in place css the seismic design, evaluation, and upgrading of building structures in Canada.
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. Examples include emergency response facilities, electric power systems, telecommunication systems, water supply, wastewater collection and treatment systems, hospitals and nursing homes, large assembly occupancies, industrial risk-generating facilities, laboratories and hazardous materials, art z832 and museums, and correctional institutions see Annex G.
Notes accompanying clauses do not include requirements csw alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. OFCs are divided into three categories of sub-components: Definitions for quality of inspection and degree of redundancy are based on industry practice and Standard.
We have no amendments or corrections for this standard.
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. 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.
The Canadian Standards Dsa CSA Standard provides information and methodology to identify and evaluate hazards caused by earthquake forces acting on OFCs and to undertake appropriate mitigation strategies and techniques.
In many cases, losses associated with damage to these components are considerably greater than damage to the structural system. If the document is revised or amended, you will be notified by email. Systems comprising several OFCs especially those involving fluid or gas flow require careful assessment of interconnections.
Guidelines for the seismic risk reduction of OFCsalso known as non-structural building components that is, building contents, bookcases, piping, light fixtures, etc.
Such work must be undertaken by a qualified professional engineer. 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. This standard is also available to be included in Standards Subscriptions. Standards Subsctiption may be the perfect solution.
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. Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Seismic Standard – Technical Guides – NPMS – Real Property – PSPC
It is important that building owners, building designers, utility designers, and geotechnical experts coordinate the interface design and details. The main cause of casualties and property damage in the event of an earthquake is often the failure cxa these OFCs. The objective is to provide a consistent risk management approach.