1700 13TH ST 2016-06-01 - Laserfiche WebLink

, L INTRODUCTION — CONTINUED Seismic Design Force for the component, Fp, is calculated per ASCE 7-10 Equations 13.3-1 thru 13.3-3. In order to perform these calculations it is first necessary that the project specific SOS value, defined below, be provided by the Engineer of Record or the Project Architect. The Sas value should commonly be identified on the structural plans or within the construction documents. SEISMIC FORCE VARIABLES Spectral Response Acceleration at Short Periods, SDS Component Amplification Factor, ap Component Response Modification Factor, Rp Component Importance Factor, Ip Component Operating Weight, Wp Height in Structure, Point of Component Attachment With Respect To Base, z Average Roof Height With Respect To Base, h Component Importance Factor, 1p, shall be 1.5 for components required for life safety applications after an earthquake, components that contain hazardous materials, and components needed for continued operation of Risk Category IV facilities (ie. designated seismic systems). Various components in non- essential facilities may also be assigned an 1,of 1.5 at the discretion of the facility owner and design team where the component is vital to continuity of facility operation. It is incumbent upon the design team to publish a schedule of assigned component importance factors. The ISAT Project Worksheet located at the back of the Manual is provided as a vehicle for gathering the required information. To obtain assistance in performing calculations, complete the Worksheet and transmit it to ISAT Technical Service. The resultant Fp values will then be calculated by ISAT and returned in conjunction with project specific submittal documentation. To obtain project worksheets for use with other codes, please contact ISAT Technical Service ISAT ENGINEERED BRACING TABLES The cumulative result of applying the seismic demand formulas is the need to provide engineered seismic restraint systems covering a substantial range of possible horizontal accelerations. For simplicity, the worst case horizontal acceleration can be calculated at the underside of the roof deck and then used for all floors of the structure. However, to achieve economy of installation, the horizontal acceleration for each floor can be computed separately and used in conjunction with the ISAT bracing tables. In response to this need ISAT has generated concise tables of the minimum restraint requirements for a broad array of component accelerations applied to commonly used suspended utilities. Please note - The use of the ISAT Engineered Bracing Tables is only applicable in conjunction with the use of ISAT's family of seismic restraint hardware. No Substitutions Allowed. For additional information contact ISAT Technical Service toll free at 877-999-4728 or visit our web site at www.ISATSB.com. .17r77:73 a International Seismic Application Technology 14848 Northam Street,La Mirada, CA 90638 877-999-4728 (Toll Free) 714-523-0845(fax) www.isatsb.com 47�' '�^ 10,,E REV 1 D a �c: 10/01/14 6 S4710 Page q r0.3 op oo- 2012/15 IBC