Best Practices for Project Management, Design, and Construction of ...
Best Practices for Project Management, Design, and Construction of ... Best Practices for Project Management, Design, and Construction of ...
3.7 Equipment Anchorage Purpose Permanent equipment and other manufactured items used in the operation of the building are required to be anchored to the floor, wall, or roof construction. The anchorage requirements must meet minimum design requirements to resist lateral forces of seismic movement as defined in the CBC. The primary consideration here is to prevent the life safety of occupants from being affected by structural and nonstructural building elements during a seismic event and to allow continued operation of hospital buildings. Equipment within the building must resist forces caused by a seismic event, which vary based on equipment location in the building. These forces must be delivered to elements of the building structure capable of resisting them. Although all permanent components, equipment, and elements of the structure must be anchored, the anchorage of some items need not be designed and detailed on the approved drawings. Section 1615A, in Part 2 of the CBC provides exemptions as follows: • Furniture (however, modular furniture that is hardwired, contains significant storage, or exceeds certain height and weight limits must be anchored); • Temporary or movable equipment (although restraints for heavy equipment and equipment with utility connections may be required); • Architectural, mechanical and electrical components in Seismic Design Categories D, E or F where all of the following apply: o o The component is positively attached to the structure; Flexible connections are provided between the component and associated ductwork, piping and conduit; and either: • The component weighs 400 pounds or less and has a center of mass located 4 feet or less above the adjacent floor or roof level that directly support the component; or, • The component weighs 20 pounds of less or, in the case of a distributed system, 5 lbs/ft or less. In many instances the information needed to provide details for specific products may be lacking in a project. Sometimes, with OSHPD acceptance, equipment anchorage may be submitted as a deferred submittal. However, it is generally more desirable to submit all equipment with the initial submission documents than to separate the equipment details, to avoid delays in approval that might affect construction. This means that design decisions must be made in advance to allow the details to be completed, and as selections and procurement dictate changes, changes submitted to OSHPD as an Amended Construction Document must be issued for each final installation. In addition to seismic anchorage, the CBC references ASCE 7, Section 13.2.2, for Special Seismic Certification for mechanical and electrical equipment “that must remain operable following the design earthquake.” Such equipment must be certified by the supplier as operable based on (OSHPD Best Practices) Page 38 DRAFT FINAL, Sept. 2011
approved “shake table testing.” OSHPD has instituted a Special Seismic Certification submittal process which assigns numbers to tested components meeting the acceptance criteria IC-ES AC156. (OSHPD Best Practices) Page 39 DRAFT FINAL, Sept. 2011
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approved “shake table testing.” OSHPD has instituted a Special Seismic Certification submittal<br />
process which assigns numbers to tested components meeting the acceptance criteria IC-ES<br />
AC156.<br />
(OSHPD <strong>Best</strong> <strong>Practices</strong>) Page 39 DRAFT FINAL, Sept. 2011
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