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// CODE SNIPPET

3103F.5.2.1.2 Survival Condition

California Building Code 2016 (Vol 1 & 2) > 31F [SLC] Marine Oil Terminals > 3103F Structural Loading Criteria > 3103F.5 Mooring Loads on Vessels > 3103F.5.2 Wind Loads > 3103F.5.2.1 Design Wind Speed > 3103F.5.2.1.2 Survival Condition
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The survival condition is defined as the state wherein a vessel can remain safely moored at the berth during severe winds. For new MOTs, the survival condition threshold is the maximum wind velocity, for a 30-second gust and a 25-year return period, obtained from historical data.
For an existing MOT, a reduced survival condition threshold is acceptable (see Figure 31F-2-1). If the wind rises above these levels, the vessel must depart the berth; it shall be able to depart within 30 minutes (see 2 CCR 2340) [3.4].
The 30-second duration wind speed shall be determined from the annual maximum wind data. Average annual summaries cannot be used. Maximum wind speed data for eight directions (45-degree increments) shall be obtained. If other duration wind data is available, it shall be adjusted to a 30-second duration, in accordance with Equation (3-12). The 25-year return period shall be used to establish the design wind speed for each direction. In order to simplify the analysis for barges (or other small vessels), they may be considered to be solid free-standing walls (Chapter 29 of ASCE/SEI 7 [3.5]). This will eliminate the need to perform a computer assisted mooring analysis.

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3103F.5.2.1.2 [SLC] Marine Oil Terminals, Survival Condition
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California Building Code 2016 (Vol 1 & 2) > 31F [SLC] Marine Oil Terminals > 3103F Structural Loading Criteria > 3103F.5 Mooring Loads on Vessels > 3103F.5.2 Wind Loads > 3103F.5.2.1 Design Wind Speed > 3103F.5.2.1.2 Survival Condition
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