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3. Engineering Review of Tanks & Equipment Covered by CalARP Program <br />C:\TRICH\Jobs\4515582 Leprino Tracy\Report\Leprino Tracy CalARP 040221.docx 3-12 <br />piping support points attached to the building. In the event that the skid topples, damage <br />to the equipment is also expected. <br />Evaporative Coils: The evaporative coils are well supported from roof framing members; <br />however, lateral bracing appears marginal depending on the location. Without adequate <br />lateral bracing, the units may sway excessively resulting in possible damage to the <br />ammonia piping and connections. <br />Piping: Piping appears to be adequately supported vertically; however, lateral restraint <br />appears marginal to inadequate depending on the location. Potential failure modes <br />include damage to the pipe or connections as a result of excessive lateral movement or <br />loss of vertical support due to marginal support conditions (hanger clamps without <br />restraining straps) or excessive lateral movement (pipe located near edge of support). . <br />Most piping connections are either welded or welded flange connections, which have <br />performed well in past earthquakes. The highest risk connections are the rare threaded <br />connections as they lack ductility and have failed in past earthquakes. <br />3.3.2 Seismic Demand <br />The operating weight of the equipment was calculated based on equipment and capacity <br />information provided by Leprino Foods as well as our past experience with similar <br />equipment. The 475-year earthquake peak ground acceleration was determined to <br />be 0.541g (Appendix A). The seismic lateral force on the equipment was calculated in <br />accordance with ASCE 7-10, Chapter 13 using the following equations: <br /> 𝐹𝑝=0.4π‘Žπ‘π‘†π·π‘†π‘Šπ‘(𝑅𝑝𝐼𝑝)(1 + 2 <br />π‘§β„Ž) <br />𝐹𝑝,π‘šπ‘Žπ‘₯= 1.6π‘†π·π‘†πΌπ‘π‘Šπ‘ 𝐹𝑝,π‘šπ‘–π‘›= 0.3π‘†π·π‘†πΌπ‘π‘Šπ‘ <br />where, <br /> SDS = spectral acceleration at short period = 0.953