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

GENERAL APPLICATION NOTES — CONTINUED 8. Every run which requires bracing shall have a minimum of two Transverse Brace locations and one Longitudinal Brace location. 9. For the purpose of these guidelines a "run" is defined as a suspended, distributed utility having a minimum of 10 foot straight run length. Refer to Page A1.2 for guidance on treating interconnected short runs with multiple off-sets. 10. If a change in run direction results in an offset in the run, the offset may not be required to be braced. Refer to specific guidelines per the "A" series pages. 11. Solid strut provides higher design capacities than punched or slotted and may allow for greater brace spacing. The ISAT Bracing Tables, therefore, are based on the use of solid strut for rigid seismic restraint brace arm construction unless noted otherwise. Refer to page El for brace arm lengths and capacities. Punched or short slot channel may be used provided the reduced design values on Page El are accounted for. 12. For trapeze construction at seismic restraint locations, strut may be solid or punched with holes. Trapeze beam elements and maximum uniform loads are shown on Page G2. 13. Solid, punched or short slot strut may be used for rod stiffening per Page G1 and for rigid brace arms or as trapeze elements. Use short slot strut as trapeze elements only at non-seismic locations. 14. Strut with 3" long slot or large diameter knockouts are not to be used. 15. Where brace elements are through-bolted, the mounting hole in the element is to be no more than 1/16" in diameter larger than the bolt or threaded rod. 16. A Longitudinal Brace at a 90 degree change in direction may act as a Transverse Brace if it is located within 2 feet of the change in direction or within the set back distances per the "A" series pages. The brace arm and anchorage must be sized to meet or exceed the requirements of the tabulated Transverse Brace loads. 17. A Transverse Brace at a 90 degree change in direction may act as a Longitudinal Brace if it is located within 2 feet of the change in direction or within the set back distances per the "A" series pages. The brace arm and anchorage must be sized to meet or exceed the requirements of the tabulated Longitudinal Brace loads. 18. When utilizing cable bracing (for other than vibration isolated systems or on piping likely to have thermal expansion and/or contraction), tension the cable to remove slack without inducing uplift of the suspended element. Cable installation is to be symmetrical. 17771 International Seismic Application Technology 14848 Northam Street,La Mirada, CA 90638 877-999-4728 (Toll Free) 714-523-0845(fax) www.isatsb.com ark ,D Rev. I �QO�+a qac-. 10/01/14 s a710 D Page 4.2 #d'4 /of c AUP- 2012/15 IBC