This standard, ""Earthquake-Actuated Automatic Gas Shutoff Devices
(ASCE 25-97)"", provides minimum functionality requirements for
earthquake-actuated automatic gas shutoff devices and systems meant
to include mechanical devices consisting of a sensing means and a
means to shut off the flow of gaseous fuels. It basically applies
to single-family or multi-family structures of three stories or
less. The seismic performance requirements established by this
Standard are based upon data from recent earthquakes, primarily in
Southern California.
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