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After several years of dealing with this process, I have found that the majority of the country will be classified as a Seismic Design Category B. This section will prove to be the most referenced section in the process. This exemption allows mechanical and electrical components that are a Seismic Design Category B to be excluded.
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The third exemption is where fire sprinkler systems are addressed. The second allows architectural components that are in a Seismic Design Category B with some exceptions concerning parapets and wall types.
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The first exemption allows you to exclude all aforementioned components if the Seismic Design Category is A. It is within these six exemptions that the “if” can be determined. Within this section are six exemptions that detail when seismic is not required. The referenced sections that deal specifically with fire sprinklers are found in the body of Section 9.6. The first exemption says, “Structures designed in accordance with the provisions of Sections 9.1 through 9.6, 9.13 and 9.14 of ASCE 7 shall be permitted.” This exemption allows the use of ASCE 7 in lieu of IBC. Structures determined to be in Seismic Design Category A need only comply with Section 1616.4.” The 2003 edition kept this requirement in place but revised the exemptions that followed. IBC Section 1614.1 states, “Every structure, and portion thereof, shall as a minimum, be designed and constructed to resist the effects of earthquake motions and assigned a Seismic Design Category as set forth in Section 1616.3. The first edition of IBC in 2000 introduced the requirement for seismic design for fire sprinklers but did not directly reference ASCE 7 at that time. It includes design criteria for seismic restraint of architectural, mechanical, and electrical components and systems. This separate document is published by the American Society of Civil Engineers. The text about earthquake protection in the IBC is based in large part on criteria found in ASCE 7. Let’s first take a look at how the IBC deals with seismic. IBC, NFPA 5000: Building Construction and Safety Code, and others all use the data collected by this organization to create the criteria that should be followed. Now that we are working in this new era, you must understand the “if” of the requirement before discussing the “how.” The information used to determine design standards includes data that is collected and tested by the National Earthquake Hazard Reduction Program (NEHRP). Part 1: Using the Seismic Design Category to determine the need for earthquake bracing.Ĭontinued from Seismic Design For Fire Sprinkler Systems – Part 1a: The Seismic Shift