Laserfiche WebLink
GENERAL APPLICATION NOTES - CONTINUED <br /> 19. Avoid bracing to structural elements which may respond differently in a seismic event. <br /> 20. As a general rule, do not mix rigid bracing and cable bracing in the same run. <br /> However, once bracing has made a 90 degree change in run direction, the bracing <br /> type may switch from rigid to cable or vice versa. <br /> 21. Bracing tables included in this Manual are based on a nominal brace angle of 45 <br /> degrees from horizontal +/- 2.5 degrees. Brace angles less than 45 degrees are <br /> acceptable without modification. Brace angles greater than 47.5 degrees up to 60 <br /> degrees above horizontal are acceptable along with those 60 degrees below <br /> horizontal. However, the Tabulated Brace Spacing and anchorage loads will require <br /> modification by ISAT Technical Support. <br /> 22. Bracing may be installed with up to +/- 7-1/2 degrees variation from "true" Transverse <br /> or "true" Longitudinal alignment without the need for additional engineering. Refer to <br /> installation details. <br /> 23. Brace Reaction (P) per the Engineered Bracing Tables was calculated based on a <br /> brace arm inclination of 45 degrees. To determine the horizontal or vertical <br /> component, divide Brace Reaction by 1.414. For purposes of this Manual, "point <br /> load" equals Brace Reaction divided by 1.414. Where other brace angles are used, <br /> the vertical and horizontal force components may be calculated using the principles of <br /> statics. <br /> 24. Minimum Rod Diameter sizes for seismic brace locations are shown within the ISAT <br /> "C" Series Engineered Bracing Tables. For locations utilizing cable brace arms, the <br /> rod size is based on dead load plus a vertical seismic acceleration force equal to 0.2 <br /> Sips Wp in accordance with ASCE 7-10, Sections 12.4.2.2 and 13.3.1. Where rigid <br /> brace arms are to be utilized the vertical component of the seismic brace reaction has <br /> also been added to the rod load. Rod strength values are listed within the "H" series <br /> pages. <br /> 25. Compare ISAT minimum rod diameters to the local trade specific requirements and to <br /> the project specifications. Use the largest required rod diameter. <br /> 26. Bolt connection strength and strut-nut slippage design values are based on the <br /> Manufacturer's recommended bolt torque. If these are not given use the values listed <br /> here: 3/8" Diameter Bolt 19 ft-lbs <br /> 1/2" Diameter Bolt 50 ft-lbs <br /> 5/8" Diameter Bolt 100 ft-lbs <br /> For RC-1, RC-2 and RC2.1 Rod Stiffener tightening requirements, refer to Page G1. <br /> 111*1 <br /> _ — <br /> International Seismic Application Technology <br /> 14848 Northam Street,La Mirada, CA 90638 <br /> 877-999-4728 (Toll Free) 714-523-0845(fax) <br /> www.isatsb.com <br /> o Rev. 1 <br /> ° a �'`ry 10/01/14 <br /> S 4710 n Page <br /> 4.3 <br /> ii.FocC40 <br /> ° 2012/15 IBC <br />