API RP-2A 20TH EDITION UPDATE: SEISMIC TOPSIDES DESIGN AND ASSESSMENT GUIDELINES

American Petroleum Institute (API) guidelines have been updated to assist with the mitigation of hazards due to undersized and inappropriately restrained deck appurtenances and equipment subject to earthquake loading. Guidance is provided for the design of new appurtenances and equipment, as well as for the assessment of the adequacy of existing facilities. Areas for continued improvement are identified.